Document:

<PAGE>
                                                                    Exhibit 10.2

                       NAVIGATION TECHNOLOGIES CORPORATION
                             A Delaware Corporation

                             DEMAND PROMISSORY NOTE

$ _____________                                               ____________, 2001

         NAVIGATION TECHNOLOGIES CORPORATION, a Delaware corporation (the
"Company"), for value received, hereby promises to pay to the order of PHILIPS
CONSUMER ELECTRONIC SERVICES B.V. ("Philips"), ON ____________, 2001 or earlier
ON DEMAND (the "MATURITY DATE"), the principal sum of ________________
($__________) (the "Loan"), together with interest on the principal balance
hereof outstanding from time to time from the date hereof until payment in full
hereof at the rates and on the dates determined in accordance with this Note.

         1. Defined Terms. In this Note the following terms have the following
meanings:

         "Collateral" has the meaning ascribed to such term in the Master Loan
Agreement.

         "Common Stock" means the Common Stock of the Company, par value $.001
per share.

         "Escrow Agent" means FileSafe, a California corporation.

         "Escrow Agreement" means the Escrow Agreement, dated as of October 22,
1996, as amended through the date hereof, by and among the Company, NavTech
North America, Philips and the Escrow Agent.

         "Escrow Agreement Amendment" means the Escrow Agreement Amendment
attached hereto as Exhibit B.

         "Default Interest Rate" has the meaning ascribed to such term in
paragraph 2 hereof.

         "Master Loan Agreement" means the Amended and Restated Master Loan
Agreement, dated as of April 1, 1997.

<PAGE>

         "NavTech North America" means Navigation Technologies North America,
Inc., a wholly-owned subsidiary of the Company and a Delaware corporation.

         "Security Agreements" means the Security Agreement, dated October 22,
1996, as amended through the date hereof, between Philips and the Company, and
the Security Agreement, dated October 22, 1996, as amended through the date
hereof, between NavTech North America and Philips.

         "Security Agreements Amendment" means the Security Agreements Amendment
attached hereto as Exhibit A.

         2. Interest Rates. The Loan shall bear interest from the date hereof at
an annual rate of 14% (on the basis of a 360-day year) until the Maturity Date.
Interest which accrues on the Loan prior to the Maturity Date shall be payable
in arrears on such date. After the Maturity Date, the Loan shall bear interest
at an annual rate of 16% (on the basis of a 360-day year) (the "Default Interest
Rate"), which interest shall be immediately due and payable, but if not so paid
shall, to the extent permitted by law, be capitalized and added to the principal
amount of the Loan and such capitalized amounts shall thereafter bear interest
at the Default Interest Rate as well. All amounts paid pursuant to this Note
shall be (i) applied first to interest and then to principal and (ii) paid by
wire transfer in immediately available funds to an account specified by Philips,
except as otherwise provided in this Note.

         3. Rank and Security. The Loan shall rank pari passu with all other
senior, secured, direct, unconditional and unsubordinated debt of the Company,
including the Notes issued under the Master Loan Agreement, and the Company
agrees to secure its obligations hereunder by granting and causing NavTech North
America to grant to Philips a first priority security interest in the Collateral
by amending the Security Agreements pursuant to the Security Agreements
Amendment.

         4. Representations and Warranties. The Company hereby represents and
warrants to Philips that (a) it is a corporation duly organized, validly
existing and in good standing under the laws of the State of Delaware and has
full corporate power to execute and deliver this Note; (b) its execution and
delivery of this Note and the borrowing evidenced hereby and the execution and
delivery of the Security Agreements Amendment and the Escrow Agreement Amendment
(i) have been duly authorized by all requisite corporate action on its part,
(ii) do not require the approval of its stockholders, (iii) will not (A) violate
any law or its Certificate of Incorporation or By-Laws, (B) violate any
governmental or agency rule or regulation applicable to the Company or any order
of any court, tribunal or governmental agency binding on it or any of its
properties, (C) violate, be in conflict with, result in a breach of or
constitute (with due notice or lapse of time or

<PAGE>

both) a default under any indenture, agreement, license or other instrument or
contract to which it is a party or by which it or any of its properties is bound
or (D) result in the creation or imposition of any lien of any nature whatsoever
on any of its assets (other than in accordance with the Security Agreements, as
amended as of the date hereof), and (iv) do not require any license, consent or
approval of any governmental agency, regulatory authority or any other third
party, not already obtained or given; and (c) each of this Note, the Security
Agreements Amendment and the Escrow Agreement Amendment to which either the
Company or NavTech North America is a party have been duly executed and
delivered by such company and are the legal, valid and binding obligations of
such company, enforceable against it accordance with their terms, except as such
enforceability may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting the enforceability of
creditors' rights generally.

         5. Covenants. (a) The Company shall at its sole expense, execute,
acknowledge, deliver, record, re-record, file, re-file, register and re-register
any and all such further acts, deeds, conveyances deeds of trust, trust deeds,
assignments, assurances and other instruments and to take all other actions
necessary (i) to ensure that the Loan ranks pari passu with all other senior,
secured, direct, unconditional and unsubordinated debt of the Company, including
the Notes issued under the Master Loan Agreement, at all times and (ii) to
perfect the security interest in the Collateral granted to Philips under the
Security Agreements, as amended pursuant to the Security Agreements Amendment.

         (b) The Company shall use its best efforts to obtain the due execution
and delivery of the Escrow Agreement Amendment by the Escrow Agent as soon as
practicable after the date hereof.

         6. Miscellaneous. (a) The Company and all endorsers and guarantors of
this Note hereby jointly and severally waive presentment, demand, notice,
protest and all other suretyship defenses generally and agree that (i) any
renewal, extension or postponement of the time of payment or any other
indulgence, (ii) any modification, supplement or alteration of any of the
Company's obligations undertaken in connection with this Note, or (iii) any
substitution, exchange or release of collateral or the addition or release of
any person or entity primarily or secondarily liable, may be effected without
notice to the Company or any endorser or guarantor of the Company's obligations,
and without releasing the Company or such endorser or guarantor from any
liability hereunder.

         (b) No delay or omission on the part of the holder in exercising any
rights hereunder shall operate as a waiver of such right or any other right of
such holder, nor shall any delay, omission or waiver on any one occasion be
deemed a bar to or waiver of the same or any other right on any future occasion.

                                       3
<PAGE>

         (c) The Company shall pay on demand all costs, including court costs
and reasonable attorneys' fees, paid or incurred by the holder hereof in
enforcing this Note.

         (d) Any communication, demand or notice to be given hereunder will be
duly given when delivered in writing or by telecopy to a party at its address as
indicated below. A communication, demand or notice given hereunder shall be
addressed:

                  If to the Company, at

                           10400 W. Higgins Road, Suite 400
                           Rosemont, IL  60018
                           Telecopy:   (847) 699-8057
                           Attention:  General Counsel

                  If to Philips, at

                           Philips Consumer Electronic Services B.V.
                           c/o Philips Electronics North America Corp.
                           1251 Avenue of the Americas
                           New York, New York 10020
                           Telecopy:   (212) 536-0589
                           Attention:  General Counsel

         (e) In case any one or more of the provisions contained in this Note
shall be invalid, illegal or unenforceable in any respect under any law, the
validity, legality and enforceability of the remaining provisions contained
herein shall not in any way be affected or impaired thereby.

         (f) THIS NOTE SHALL BE GOVERNED AND CONSTRUED IN ACCORDANCE WITH THE
INTERNAL LAWS OF THE STATE OF NEW YORK, UNITED STATES OF AMERICA.

         IN WITNESS WHEREOF, the Company has caused this Note to be executed and
delivered by its duly authorized officer and to be dated the date of issuance
hereof.

                       NAVIGATION TECHNOLOGIES CORPORATION

By:                                          By:
   -------------------------                    ----------------------------
Name:                                        Name:
     -----------------------                      --------------------------
Title:                                       Title:
      ----------------------                       -------------------------

                                        4

<PAGE>

                                                                       EXHIBIT A

                                                              ____________, 2001

Philips Consumer Electronic Services B.V.
c/o Philips Electronics North America Corp.
100 East 42nd Street
New York, NY 10017

                      Re: Amendment of Security Agreements

Ladies and Gentlemen:

         This letter agreement (the "Letter Agreement") is made as of the date
first written above, by and among Philips Consumer Electronic Services B.V.
(f.k.a. Philips Media Services B.V.) ("Philips"), Navigation Technologies
Corporation, a Delaware corporation (the "Company"), and Navigation Technologies
North America Inc., a wholly-owned subsidiary of the Company and a Delaware
corporation ("NavTech"). Reference is made to (i) the Demand Promissory Note,
dated _________, 2001 (the "Convertible Demand Note"), issued by the Company to
Philips; (ii) the Security Agreement, dated October 22, 1996, as amended through
the date hereof (the "Company Security Agreement"), between the Company and
Philips; and (iii) the Security Agreement, dated October 22, 1996, as amended
through the date hereof (the "NavTech Security Agreement", and together with the
Company Security Agreement, the "Security Agreements"), between NavTech and
Philips. Each of Philips, the Company and NavTech is referred to herein
individually as a "Party", and collectively as the "Parties".

         WHEREAS, Philips has agreed to provide the Company with a convertible
demand note loan subject to and upon the terms and conditions of the Convertible
Demand Note, including inter alia that the Company secure the obligations of the
Company thereunder to Philips by pledging to Philips the Company Collateral
(described in the Company Security Agreement) and that NavTech secure the
obligations of the Company thereunder by pledging to Philips the NavTech North
America Collateral (described in the NavTech Security Agreement);

         WHEREAS, the Company and NavTech have agreed that the obligations of
the Company to Philips under the Convertible Demand Note will comprise Secured
Obligations of the Company for all purposes under the Security Agreements;

         NOW, THEREFORE, the Parties agree as follows:

     1.  The following paragraphs replace in their entirety the third and fourth
additional recitals, respectively, of each of the Security Agreements:

                                        1

<PAGE>

                  "WHEREAS, the Borrower has issued to the Lender a
                  Demand Promissory Note, dated ________, 2001; and

                  WHEREAS, the Borrower and the Lender have agreed that the Loan
                  (as defined in such Demand Promissory Notes) will be made only
                  upon the condition that the Borrower shall have amended this
                  Security Agreement;"

     2. The definition of "Convertible Demand Notes" in each of the Security
Agreement is replaced in its entirety with the following:

                  "Convertible Demand Notes" shall mean collectively the Demand
                  Promissory Note, dated ________, 2001, issued by the Borrower
                  to the Lender and each individually a "Convertible Demand
                  Note".

     3. The definition of "Event of Default" in each of the Security Agreements
is replaced in its entirety with the following:

                  "Event of Default" shall mean any of the events described in
                  Section 8.01 of the Loan Agreement or any payment default
                  under any of the Convertible Demand Notes.

     4. The definition of "Secured Obligations" in each of the Security
Agreements is replaced in its entirety with the following:

                  "Secured Obligations" shall mean (i) all of the unpaid
                  principal amount of, and accrued interest on, the Demand Note
                  Loans, (ii) all of the unpaid principal amount of, and accrued
                  interest on, the loan under the Convertible Demand Note, and
                  (iii) all other liabilities and obligations of the Borrower,
                  whether now existing or hereafter incurred, under or in
                  connection with the Loan Agreement, any of the Convertible
                  Demand Notes, this Security Agreement or any of the other
                  Credit Documents."

     5. Except as expressly provided in this Letter Agreement, all of the terms
and provisions of the Security Agreements shall be and remain in full force and
effect as written as of October 22, 1996, and as previously amended as of
____________, 2001.

         If the foregoing is in accordance with your understanding, please sign
and return to us a counterpart of this Letter Agreement, whereupon it will
become the valid and legally binding agreement of the Parties.

                                        2

<PAGE>

                                          Very truly yours,

                                          NAVIGATION TECHNOLOGIES
                                          CORPORATION

                                          By
                                            ------------------------------------
                                            Name:
                                            Title:

                                          NAVIGATION TECHNOLOGIES
                                          NORTH AMERICA, INC.

                                          By
                                            ------------------------------------
                                            Name:
                                            Title:

Agreed and accepted as of the date
first above written:

PHILIPS CONSUMER ELECTRONIC SERVICES B.V.

By
  ----------------------------------------
  Name:
  Attorney-in-fact pursuant to
  Power of Attorney

                                        3

<PAGE>

                                                                       EXHIBIT B

                                                              ____________, 2001

Philips Consumer Electronic Services B.V.
c/o Philips Electronics North America Corp.
100 East 42nd Street
New York, NY 10017

                        Re: Amendment of Escrow Agreement

Ladies and Gentlemen:

         This letter agreement (the "Letter Agreement") is made as of the date
first written above, by and among Philips Consumer Electronic Services B.V.
(f.k.a. Philips Media Services B.V.)("Philips"), Navigation Technologies
Corporation, a Delaware corporation (the "Company"), Navigation Technologies
North America Inc., a wholly- owned subsidiary of the Company and a Delaware
corporation ("NavTech") and FileSafe Inc., a California corporation (the "Escrow
Agent"). Reference is made to (i) the Demand Promissory Note, dated _________,
2001, issued by the Company to Philips (the "Convertible Demand Note"); (ii) the
Security Agreement, dated October 22, 1996, as amended through the date hereof
(the "Company Security Agreement"), between the Company and Philips; (iii) the
Security Agreement, dated October 22, 1996, as amended through the date hereof
(the "NavTech Security Agreement", and together with the Company Security
Agreement, the "Security Agreements"), between NavTech and Philips; and (iv) the
Escrow Agreement, SourceFile Number 7405, among Philips, the Company, NavTech
and the Escrow Agent, as amended through the date hereof. Each of Philips, the
Company, NavTech and the Escrow Agent is referred to herein individually as a
"Party", and collectively as the "Parties".

         WHEREAS, Philips has agreed to provide the Company with a convertible
demand note loan subject to and upon the terms and conditions of the Convertible
Demand Note, including inter alia that the Company secure the obligations of the
Company thereunder to Philips by pledging to Philips the Company Collateral
(described in the Company Security Agreement) and that NavTech secure the
obligations of the Company thereunder by pledging to Philips the NavTech North
America Collateral (described in the NavTech Security Agreement);

                                       1
<PAGE>

         WHEREAS, the Company and NavTech have agreed that the obligations of
the Company to Philips under the Convertible Demand Note comprise Secured
Obligations of the Company for all purposes under the Security Agreements and
have agreed to amend the Security Agreements as of the date hereof accordingly;

         NOW, THEREFORE, the Parties agree to amend the Escrow Agreement in
conjunction with the foregoing recitals as follows:

     1. The first recital of the Escrow Agreement is amended by replacing the
words "and the Demand Promissory Note, dated _________, 2001," with the words ",
the Demand Promissory Note, dated ___________, 2001 (each, a "Convertible Demand
Note"),".

     2. The introductory paragraph of Section 3 Terms and Conditions of Source
Code Escrow is amended by replacing the clause starting immediately after the
words "...date hereof" in the fifth line with the following:

                  "or Beneficiary provides SourceFile with an affidavit stating
                  that, "A payment default has occurred under any Convertible
                  Demand Note"".

     3. Except as expressly provided in this Letter Agreement, all of the terms
and provisions of the Escrow Agreement shall be and remain in full force and
effect as written as of October 22, 1996, and as amended as of _____________,
2001.

                                        2

<PAGE>

         If the foregoing is in accordance with your understanding, please sign
and return to us a counterpart of this Letter Agreement, whereupon it will
become the valid and legally binding agreement of the Parties.

                                          Very truly yours,

                                          NAVIGATION TECHNOLOGIES CORPORATION

                                          By
                                            ------------------------------------
                                            Name:
                                            Title:

                                          NAVIGATION TECHNOLOGIES
                                          NORTH AMERICA, INC.

                                          By
                                            ------------------------------------
                                            Name:
                                            Title:

                                          FILESAFE, INC.

                                          By
                                            ------------------------------------
                                            Name:
                                            Title:

Agreed and accepted as of the date
first above written:

PHILIPS CONSUMER ELECTRONIC SERVICES B.V.

By
  ----------------------------------------
  Name:
  Attorney-in-fact pursuant to
  Power of Attorney

                                        3<PAGE>

                                                                  Exhibit 10.3

                   AMENDED AND RESTATED MASTER LOAN AGREEMENT

                  AMENDED AND RESTATED MASTER LOAN AGREEMENT, dated as of April
1, 1997, between NAVIGATION TECHNOLOGIES CORPORATION, a Delaware corporation
(the "Company"), and PHILIPS MEDIA SERVICES B.V. ("Philips").

                              W I T N E S S E T H:
                               - - - - - - - - - -

                  WHEREAS, the Company and Philips are party to a Master Loan
Agreement, dated October 22, 1996 (the "Original Master Loan Agreement", and as
amended and restated on the date hereof, the "Master Loan Agreement"); and

                  WHEREAS, the Company has secured all of its obligations under
the Original Master Loan Agreement by pledging to Philips the Company Collateral
described in the Security Agreement, dated October 22, 1996, between the Company
and Philips (the "Company Security Agreement"); and

                  WHEREAS, NAVIGATION TECHNOLOGIES NORTH AMERICA, INC., a
Delaware corporation and wholly-owned subsidiary of the Company ("NavTech North
America"), has secured all of the Company's obligations under the Master Loan
Agreement by pledging to Philips all of its right, title and interest in and to
the NavTech North America Collateral (together with the Company Collateral, the
"Collateral") described in the Security Agreement, dated October 22, 1996,
between NavTech North America and Philips (the "NavTech North America Security
Agreement" and, together with the Company Security Agreement, the "Security
Agreements"); and

                  WHEREAS, the Company and Philips have agreed to amend and
restate the Original Master Loan Agreement as provided herein; and

                  WHEREAS, the Company and NavTech North America have
acknowledged and consented to such amendments and restatement and have agreed
that the Company's obligations to Philips under this Master Loan Agreement as so
amended and restated will comprise Secured Obligations of the Company for all
purposes under the Company Security Agreement and the NavTech North America
Security Agreement, respectively, as evidenced by their respective signatures
set forth following the signature page hereof; and

                  WHEREAS, Philips has provided the Company a total of
$34,750,000 (excluding capitalized interest thereon) of Demand Note Loans prior
to April 1, 1997 on the terms and conditions set forth in the Original Master
Loan Agreement; and

<PAGE>

                  WHEREAS, the Company has requested that Philips agree to
provide Term Note Loans to the Company from time to time to enable the Company
to fund its operations; and

                  WHEREAS, Philips has agreed to provide Term Note Loans on the
terms and conditions set forth herein,

                  NOW, THEREFORE, the parties hereto agree as follows:

                                   ARTICLE I.

                  Section 1.01.  Definitions.

                  (a) Terms Generally. The terms defined in this Section 1.01
and elsewhere in this Agreement shall apply equally to both the singular and
plural forms of the terms defined. Whenever the context may require, any pronoun
shall include the corresponding masculine, feminine and neuter forms. The words
"include", "includes" and "including" shall be deemed to be followed by the
phrase "without limitation". All references herein to Articles, Sections,
Exhibits and Schedules shall be deemed references to Articles and Sections of,
and Exhibits and Schedules to, this Agreement unless the context shall otherwise
require. Unless otherwise provided, all references herein to "dollars" and "$"
shall be deemed references to the lawful money of the United States of America.

                  (b) Accounting Terms. Except as otherwise expressly provided
herein, all terms of an accounting or financial nature shall be construed in
accordance with GAAP, as in effect from time to time.

                  (c) Other Terms. The following terms shall have the meanings
ascribed to them below or in the Sections of this Agreement indicated below:

                  "Affiliated Entity" shall mean any corporation, partnership or
limited liability company, in which the Company, directly or indirectly, has 50%
or more of the voting power or the right to receive 50% or more of the income
(or, in the case of partnerships, distributions) or, upon dissolution or
liquidation, the assets thereof.

                  "Ancillary Agreements" shall mean the Termination Agreement,
substantially in the form attached hereto as Exhibit E-1, Amendment No. 2 to the
1994 Stock Purchase Agreement, substantially in the form attached hereto as
Exhibit E-2, and Amendment No. 4 to the Stock Purchase Agreement, substantially
in the form attached hereto as Exhibit E-3.

                                      -2-

<PAGE>

                  "Board" shall mean for any Person the board of directors or
any organization having substantially the same functions, rights and powers as
the board of directors of a corporation incorporated in the State of Delaware.

                  "Business Day" shall mean any day except a Saturday, Sunday or
other day on which commercial banks in New York City are required or authorized
by law to close.

                  "Capital Expenditures" shall mean, for any period, the
aggregate of all expenditures (whether paid in cash or accrued as liabilities
and including that portion of Capital Leases which is capitalized on the balance
sheet of the Company) by the Company during that period that are included in the
property, plant or equipment reflected in the balance sheet of the Company.

                  "Capital Lease" shall mean, with respect to any Person, any
obligation of such Person to pay rent or other amounts under a lease with
respect to any property (whether real, personal or mixed) acquired or leased by
such Person that is required to be accounted for as a liability on a balance
sheet of such Person.

                  "Capital Lease Obligations" shall mean the obligation of any
Person to pay rent or other amounts under a Capital Lease.

                  "Collateral" shall have the meaning ascribed to such term in
the recitals hereof.

                  "Common Stock" shall mean the Common Stock of the Company, par
value $.001 per share.

                  "Company" shall have the meaning ascribed to such term in the
introductory paragraph of this Agreement.

                  "Company Collateral" shall have the meaning ascribed to such
term in the recitals hereof.

                  "Company Security Agreement" shall have the meaning ascribed
to such term in the recitals hereof.

                  "Credit Documents" shall mean this Agreement, as amended and
as it may be further amended, the Security Documents, the Escrow Agreement, the
Warrant Agreement and the Term Notes.

                  "Database" shall mean, whether in the Company's possession,
NavTech North America's possession, SEI's possession, or otherwise, (i) the
Company's navigable database, as it may be updated or expanded from time to
time, as described in the

                                      -3-

<PAGE>

Registration Statement, which is a digital representation of road transportation
networks currently covering the United States and selected European countries,
and (ii) all software and tools, as such term is used in the Registration
Statement, used in database creation, updating, modification, distribution, and
other operations of the Company related to such navigable database either
currently conducted or contemplated to be conducted, including (a) tools for
automated data capture from machine-readable sources, including post office and
public domain government spatial data files; (b) comparison and validation tools
for merging data from multiple sources; (c) verification tools to validate
connectivity and consistency; (d) integration tools for merging new data into
the database structure; (e) statistical and reporting tools for extracting
information in human readable form; and (f) translation software for generating
versions of the database in a variety of formats.

                  "Default" shall mean any event or circumstance which, with the
giving of notice or the passage of time, or both, would become an Event of
Default.

                  "Demand Note Loan" shall mean any loan provided pursuant to
the Original Master Loan Agreement

                  "Demand Notes" shall mean the promissory notes evidencing any
Demand Note Loans.

                  "Escrow Agent" shall mean FileSafe, or any successor escrow
agent under the Escrow Agreement.

                  "Escrow Agreement" shall mean the Escrow Agreement, dated as
of October 22, 1996, by and among the Company, NavTech North America, Philips
and FileSafe, Inc. ("FileSafe") as escrow agent.

                  "Event of Default" shall mean any of the events described in
Section 8.01.

                  "Expected Monthly Shortfall" for any month means the amount by
which (x) the Company's Operating Cash Outflows (pursuant to the most recent
business plan and budget approved and as amended from time to time by the
Company's Board) projected for such month by the Company exceed (y) the sum of
(i) expected cash receipts for such month excluding any new Term Note Loans
(pursuant to such business plan and budget) plus (ii) the expected balances in
all of the Company's bank accounts at the beginning of such month (net of $1
million of ordinary operating cash balances); provided, that Expected Monthly
Shortfall shall not include the amount in this clause (ii) after any funding
termination notice is provided to the Company by Philips pursuant to Section
2.08, except in the manner set forth therein.

                  "Governmental Authority" shall mean any nation or government,
any state or other political subdivision thereof and any entity exercising
executive, legislative, judicial, regulatory or administrative functions of or
pertaining to government.

                                      -4-

<PAGE>

                  "hereby", "herein", "hereof", "hereunder" and words of similar
import refer to this Agreement as a whole (including any schedules thereto) and
not merely to the specific section, paragraph or clause in which the respective
word appears.

                  "Indebtedness" of any Person shall mean, without duplication,
(a) all indebtedness of such Person for borrowed money or for the deferred
purchase price of property or services (including all obligations, contingent or
otherwise, of such Person in connection with letter of credit facilities,
acceptance facilities, Interest Rate Protection Agreements or other similar
facilities, including currency swaps) other than indebtedness to trade creditors
and service providers incurred in the ordinary course of business, (b) all
obligations of such Person evidenced by bonds, notes, debentures or other
similar instruments, (c) all indebtedness created or arising under any
conditional sale or other title retention agreement with respect to property
acquired by such Person (even though the rights and remedies of the seller or
lender under such agreement in the event of default are limited to repossession
or sale of such property), (d) all Capital Lease Obligations of such Person, (e)
all Indebtedness of others of the type referred to in clause (a), (b), (c) or
(d) above secured by (or for which the holder of such Indebtedness has an
existing right, contingent or otherwise, to be secured by) any Lien upon or in
property (including accounts and contract rights) owned by such Person, even
though such Person has not assumed or become liable for the payment of such
Indebtedness, (f) all preferred stock issued by such Person which is redeemable
prior to the full satisfaction of the Company's obligations under the Credit
Documents (including repayment in full of the Demand Note Loans and the Term
Note Loans and all accrued interest thereon) other than at the option of such
Person, valued at the greater of its voluntary or involuntary liquidation
preference plus accrued and unpaid dividends and (g) all Indebtedness of others
guaranteed by such Person.

                  "Initial Term Note Loan" shall have the meaning ascribed to
such term in Section 2.01 hereof.

                  "Interest Expense" of the Company shall mean, for any period,
the actual expense, whether paid or accrued, incurred by the Company for
interest on its Indebtedness, as shown on the income statement for the Company
for such period.

                  "Interest Rate Protection Agreements" shall mean any interest
rate swap agreement, interest rate cap agreement or similar arrangement used by
a Person to fix or cap a floating rate of interest on Indebtedness to a
negotiated maximum rate or amount.

                  "Lien" shall mean, with respect to any asset, (a) any
mortgage, deed of trust, lien, pledge, encumbrance, charge or security interest
in or on such asset, (b) the interest of a vendor or lessor under any
conditional sale agreement, capital lease or title retention agreement relating
to such asset, (c) in the case of securities, any purchase option, call or
similar right of a third party with respect to such securities, and (d) any

                                      -5-

<PAGE>

assignment of interest filed with the United States Copyright Office or the
United States Patent and Trademark Office, provided, however, that non-exclusive
licenses in and to the Database (or any portion thereof) shall not be considered
Liens for any purposes hereof.

                  "Material Adverse Effect" shall mean, with respect to the
Company, (i) any material adverse effect on the business, properties, condition
(financial or otherwise), prospects or operations of the Company since any
reference date, (ii) any material adverse effect on the ability of the Company
to perform its obligations hereunder and under any of the Credit Documents,
(iii) any adverse effect on the legality, validity, binding effect or
enforceability of any other Credit Document, and (iv) any adverse effect on the
perfection (to the extent required under the Security Agreement) or priority of
Philips' Liens upon the Collateral under the Security Documents.

                  "NavTech International" shall mean Navigation Technologies
International Corporation, a wholly-owned subsidiary of the Company.

                  "NavTech North America" shall have the meaning set forth in
the recitals hereof.

                  "NavTech North America Collateral" shall have the meaning
ascribed to such term in the recitals hereof.

                  "NavTech North America Security Agreement" shall have the
meaning ascribed to such term in the recitals hereof.

                  "Note" shall mean a Demand Note or a Term Note and "Notes"
shall mean the Demand Notes and the Term Notes collectively.

                  "Operating Cash Outflows" shall mean, for any period with
respect to any Person, cash expenditures (including Capital Expenditures made in
accordance with Section 7.02(f) hereof) by such Person during such period.

                  "Permitted Encumbrances" shall mean (i) Liens for taxes not
delinquent or being contested in good faith and by appropriate proceedings and
for which reserves adequate under GAAP are being maintained, (ii) deposits or
pledges to secure obligations under workers' compensation, social security or
similar laws, or under unemployment insurance, (iii) deposits or pledges to
secure bids, tenders, contracts (other than contracts for the payment of money),
leases, statutory obligations, surety and appeal bonds and other obligations of
like nature arising in the ordinary course of business, (iv) mechanics',
worker's, materialmen's or other like Liens arising in the ordinary course of
business with respect to obligations which are not due or which are being
contested in good faith, (v) minor imperfections of title on real estate,
provided such imperfections do not render title unmarketable, (vi) any mortgage,
encumbrance or other Lien upon, or security interest in,

                                      -6-

<PAGE>

any property hereafter acquired, pursuant to a Capital Lease or otherwise, by
the Company created contemporaneously with such acquisition to secure or provide
for the payment or financing of any part of the purchase price thereof, or the
assumption of any Lien upon, or security interest in, any such property
hereafter acquired existing at the time of such acquisition, or the acquisition
of any such property subject to any Lien without the assumption thereof,
provided that each such Lien shall attach only to the property so acquired and
fixed improvements thereon, including properties and improvements directly or
indirectly on such acquired property and (vii) Liens granted to Philips pursuant
to the Security Agreements, provided, however, notwithstanding (i) through (vii)
above, Permitted Encumbrances shall not include any Liens of any kind
voluntarily created by the Company or NavTech North America on the Database.

                  "Person" shall mean any individual, sole proprietorship,
partnership, joint venture, trust, unincorporated organization, association,
corporation, institution, public benefit corporation, entity or government
(whether Federal, state, county, city, municipal or otherwise, including any
instrumentality, division, agency, body or department thereof).

                  "Philips Group" shall mean Philips Electronics N.V. and its
direct and indirect subsidiaries.

                  "Positive Net Operating Cash Flow" shall mean, for any period,
the amount (if any) by which the cash receipts during such period exceed the
Operating Cash Outflows for such period.

                  "Preferred Stock" shall mean the preferred stock of the
Company outstanding on the date hereof.

                  "Registration Statement" shall mean the Registration Statement
(Registration No. 333-08409) filed by the Company with the Securities and
Exchange Commission on July 19, 1996, as amended by Amendment No. 1 thereto
filed on August 22, 1996, Amendment No. 2 thereto filed on September 10, 1996
and Amendment No. 3 thereto filed on September 17, 1996.

                  "Security Agreements" shall have the meaning ascribed to such
term in the recitals hereof.

                  "Security Documents" shall mean the Security Agreements,
financing statements relating thereto prepared on Form UCC-1, assignment of
interest documents filed with the United States Copyright Office and the United
States Patent and Trademark Office, and other financing and assignment documents
as provided in the Security Agreements.

                  "SEI" shall mean Shields Enterprises, Inc., a Delaware
corporation.

                                      -7-

<PAGE>

                  "Term Note Loan" shall have the meaning ascribed to such term
in Section 2.01 hereof.

                  "Term Notes" shall have the meaning ascribed to such term in
Section 2.02 hereof.

                  "Termination Date" shall have the meaning set forth in Section
10.04.

                  "Warrant Agreement" shall mean the Warrant Agreement, dated as
of April 1, 1997, between the Company and Philips.

                                   ARTICLE II.

                               THE TERM NOTE LOANS

                  Section 2.01. The Term Note Loans. Subject to the terms and
conditions hereof and satisfaction of the conditions precedent contained in
Sections 6.01 and 6.02 relating thereto, Philips agrees to make a loan to the
Company (the "Initial Term Note Loan") in an amount equal to the outstanding
balance of all Demand Note Loans outstanding on such date, including all
capitalized interest and any accrued but not capitalized interest. Thereafter,
upon the written request of the Company (which shall not be made more frequently
than once per calendar month), subject to the terms and conditions hereof and
satisfaction of the conditions precedent contained in Sections 6.01 and 6.02
relating thereto, and subject to the provisions of Section 2.08, Philips agrees
to make additional term loans (each a "Term Note Loan" and, together with the
Initial Term Note Loan, the "Term Note Loans") to the Company on or prior to the
earliest of (x) the date on which Philips' obligations to provide additional
Term Note Loans terminates as provided in Section 2.08, (y) January 1, 2001 and
(z) the Termination Date, in such amounts as shall be requested, from time to
time, by the Company up to the Expected Monthly Shortfall for the upcoming
calendar month.

                  Section 2.02. The Term Note. The Company's obligation to repay
the Term Note Loans shall be evidenced by promissory notes of the Company,
substantially in the form of Exhibit A attached hereto (each, a "Term Note"),
payable to the order of Philips or its designee.

                  Section 2.03. Warrants. Concurrent with any making of the Term
Note Loans (subject, in the case of the Initial Term Note Loan, to the proviso
to the immediately following sentence) hereunder, NavTech shall issue to Philips
or an Affiliated Entity warrants to purchase shares of NavTech Common Stock (the
"Warrants") as provided in the immediately following sentence. The number of
shares of Common Stock which may be purchased upon exercise of the Warrants
shall initially be

                                      -8-

<PAGE>

equal to 412,000 shares (as currently constituted) for every $1,000,000
principal amount of Term Note Loans provided to NavTech, adjusted
proportionately for increments of less than $1,000,000, subject to adjustment
mutatis mutandis in accordance with the provisions of Section 9 of the Warrant
Agreement; provided, that no Warrants shall be issued in respect of the amount
of outstanding Demand Note Loans (including all amounts in respect of
capitalized interest and accrued but not capitalized interest thereon) made by
Philips to the Company hereunder prior to April 1, 1997. The terms and
conditions of the Warrants shall be as provided in the Warrant Agreement.

                  Section 2.04. Repayment of Demand Note Loans with Proceeds of
Initial Term Note Loan. The Company will use the proceeds of the Initial Term
Note Loan immediately to repay in full the balance of all Demand Note Loans
outstanding on such date, including all capitalized interest and any accrued but
not capitalized interest thereon. Upon such repayment in full, Philips shall
return all Demand Notes to the Company.

                  Section 2.05. Repayment of Term Note Loans. All outstanding
amounts under any Term Notes, including all amounts in respect of capitalized
interest and any accrued but not capitalized interest and any unpaid interest
thereon, shall be due and payable in full on April 1, 2007.

                  Section 2.06. Mandatory Prepayments of Term Note Loans at
Philips' Option. All outstanding Term Note Loans, including all amounts in
respect of capitalized interest and any accrued but not capitalized interest and
any unpaid interest thereon, shall be due and payable in whole or in part, at
the option of Philips, at any time and (if in part) from time to time,

                  (a) upon notice from Philips to the Company, from the net cash
         proceeds of any other financing procured by the Company pursuant to
         Section 7.01(g) or otherwise;

                  (b) upon notice from Philips to the Company, if any proceeding
         has been brought in any court of any Governmental Authority seeking to
         limit the rate of interest payable under any Term Note to less than
         that provided in Section 3.01 hereof and such proceeding has not been
         dismissed within 60 days, or if a judgment reducing the interest rate
         has been rendered;

                  (c) upon not less than five days' notice from Philips to the
         Company, from any accumulated cash available from Positive Net
         Operating Cash Flow, provided, that Philips may not demand prepayment
         pursuant to this clause (c) after any funding termination notice is
         given by Philips pursuant to Section 2.08 (unless such notice shall
         have been rescinded by Philips, and Philips shall have reinstated its
         Term Note Loan funding obligations hereunder); or

                                      -9-

<PAGE>

                  (d) upon not less than 12 months' notice from Philips to the
         Company given on or after January 1, 2001.

                  Any such prepayments of Term Note Loans will be applied first
to any accumulated, unpaid and not theretofore capitalized interest, and then to
outstanding principal amount of Term Note Loans.

                  Section 2.07. Optional Prepayments of Term Note Loans. Upon
payment in full of all accrued and unpaid but not capitalized interest thereon,
the Company shall have the right to prepay all or any part of any Term Note
Loans prior to the conversion of such Term Note Loans pursuant to Section 9.01
hereof.

                  Section 2.08. No Obligation to Provide Additional Term Note
Loans Following Notice by Philips. Upon not less than two months' written notice
by Philips to the Company, Philips shall not be obligated to provide any
additional Term Note Loans hereunder; provided, that as long as the Company is
current in the performance of its payment obligations to Philips and Philips'
Affiliated Entities (other than obligations disputed in good faith and of less
than $25,000 in the aggregate)

                  (i)   Philips will continue to provide Term Note Loans to the
         Company upon request in accordance with the terms and conditions of
         this Agreement in amounts equal to the Expected Monthly Shortfalls
         during the two months following such notice if the Company cannot
         obtain financing during such period from alternative sources on terms
         acceptable to the Company's Board;

                  (ii)  Philips will continue to provide Term Note Loans to the
         Company upon request in accordance with the terms and conditions of
         this Agreement in amounts equal to 90% of the Expected Monthly
         Shortfalls during the three months following such two month period if
         the Company cannot obtain financing during such period from alternative
         sources on terms acceptable to the Company's Board; and

                  (iii) Philips will continue to provide Term Note Loans to the
         Company upon request in accordance with the terms and conditions of
         this Agreement in amounts equal to 70% of the Expected Monthly
         Shortfalls during the three months following the three month period
         described in (ii) above if the Company cannot obtain financing during
         such period from alternative sources on terms acceptable to the
         Company's Board;

and provided, further, that the amount of funds provided by Philips with respect
to the last of such months will be reduced by the amount of the aggregate
balances in all of the Company's bank accounts at the time such notice is given,
and, if such balances were greater than the amount of the Term Note Loan
otherwise required for such month, the Company shall pay to Philips on the date
such Term Note Loan would have been made

                                      -10-

<PAGE>

the full amount of such excess in immediately available funds. Following the
period referred to in (iii) above (or upon such earlier time that the Company
obtains financing from alternative sources on terms acceptable to the Company's
Board), Philips shall have no further obligation to provide additional Term Note
Loans hereunder.

                                  ARTICLE III.

                        INTEREST, METHOD OF PAYMENT, ETC.

                  Section 3.01. Interest on Term Notes. Each Term Note shall
bear interest from the date of such Term Note at a rate of 14% per annum (on the
basis of a 360-day year) until the earliest of (i) April 1, 2007, (ii) the date
on which such Term Note shall become due and payable pursuant to Section 8.01
and (iii) any earlier conversion of such Term Note pursuant to Section 9.01
hereof. Interest which accrues on any Term Note prior to April 1, 2002 shall not
be payable currently except following demand for repayment of the outstanding
principal of such Term Note (including any capitalized interest) pursuant to
Section 2.06. All such interest which accrues prior to such date shall be
capitalized and added to the principal amount of such Term Note on the first day
of every month subsequent to the date of such Term Note, and such capitalized
amounts shall thereafter bear interest at the rate set forth above. Interest
which accrues on and after April 1, 2002 on amounts outstanding under any Term
Notes (including amounts in respect of interest capitalized before such date)
shall be payable in cash quarterly in arrears in the manner provided in Section
4.02 hereof.

                  Section 3.02. Post Maturity Interest. After any demand for
repayment of any amounts outstanding under any Term Note pursuant to Section
2.06, during the continuance of any of the Events of Default described in
Section 8.01(a), (b) or (c), and on and after April 1, 2007, the Term Notes
shall bear interest, payable on demand, at a rate of 16% per annum (on the basis
of a 360-day year), compounded monthly.

                  Section 3.03. Maximum Interest Rate. (a) Nothing in this
Agreement or any Term Note shall require the Company to pay interest at a rate
exceeding the maximum rate permitted by applicable law. This Section is not
intended to limit the rate of interest to the maximum rate permitted by the laws
of the State of New York (or any other applicable law) if a higher rate is
permitted by supervening provisions of U.S. Federal law.

                  (b) If the amount of interest payable on any interest payment
date in respect of the immediately preceding interest computation period,
computed pursuant to this Article III, would exceed the maximum amount permitted
by applicable law to be charged, the amount of interest payable on such interest
payment date shall automatically be reduced to such maximum permissible amount.

                                      -11-

<PAGE>

                  (c) If the amount of interest payable in respect of any
interest computation period is reduced pursuant to clause (b) of this Section
and the amount of interest payable in respect of any subsequent interest
computation period would be less than the maximum amount permitted by law to be
charged, then the amount of interest payable in respect of such subsequent
interest computation period shall be automatically increased to such maximum
permissible amount; provided that at no time shall the aggregate amount by which
interest paid has been increased pursuant to this clause (c) exceed the
aggregate amount by which interest paid has theretofore been reduced pursuant to
clause (b) of this Section 3.03.

                                   ARTICLE IV.

                            DISBURSEMENT AND PAYMENT

                  Section 4.01 Disbursements. Any Term Note Loans made by
Philips to the Company shall be disbursed in immediately available funds by wire
transfer to an account designated by the Company.

                  Section 4.02. Method of Payment. All payments by the Company
hereunder and under the Credit Documents shall be made without setoff or
counterclaim to Philips by wire transfer in immediately available funds to an
account designated by Philips, on the date when due.

                                   ARTICLE V.

                         REPRESENTATIONS AND WARRANTIES

                  Section 5.01. Representations and Warranties. Subject to the
matters set forth on Schedule 5.01 hereto, the Company represents and warrants
to Philips that:

                  (a) Authority. Each of the Company and NavTech North America
has full power and authority to execute, deliver and perform each of the Credit
Documents, the Ancillary Agreements and the Warrant Agreement to which it is a
party and to grant to Philips the security interests and liens described therein
and thereby and the Company has full power and authority to make the borrowings
contemplated hereby, to execute and deliver the Term Notes and to incur the
obligations provided for herein and therein, all of which have been duly
authorized by all proper and necessary action on the part of the Company and
NavTech North America.

                  (b) Authorizations. All authorizations, consents, approvals,
registrations, notices, exemptions and licenses with or from Governmental
Authorities and other Persons which are necessary for the borrowing hereunder,
the grant of the security interests in and liens on the Collateral (as defined
in the Security Agreement) the

                                      -12-

<PAGE>

execution and delivery of the Credit Documents, the performance by each of the
Company and NavTech North America of its respective obligations hereunder and
thereunder and the exercise by Philips of their remedies hereunder and
thereunder have been effected or obtained and are in full force and effect;
provided, however, no representation is made with respect to any portions of the
Database relating solely to any European country.

                  (c) Binding Agreements. This Agreement and each of the other
Credit Documents, Ancillary Agreements and the Warrant Agreement to which it is
a party (other than the Term Notes) constitutes, and each Demand Note and each
Term Note, when executed and delivered pursuant hereto for value received, will
constitute, the valid and legally binding obligation of the Company enforceable
in accordance with its terms, and each of the Credit Documents to which NavTech
North America is a party constitutes the valid and legally binding agreement of
NavTech North America enforceable in accordance with its terms.

                  (d) Indebtedness. As of the date hereof, except for Demand
Note Loans and Indebtedness secured by Permitted Encumbrances, the Company
(together with its subsidiaries) has no Indebtedness.

                  (e) Use of Proceeds. The proceeds of the Initial Term Note
Loan will be used by the Company immediately to repay in full the balance of all
Demand Note Loans outstanding on such date, including all capitalized interest
and any accrued but not capitalized interest. The proceeds of any Term Note
Loans subsequent to the Initial Term Note Loan will be used for working capital.

                  (f) Title to Assets. The Company, NavTech North America,
NavTech International, or NavTech International's direct or indirect
wholly-owned subsidiaries have licenses for, title to, or a valid leasehold
interest in, all properties and assets used in the business of the Company,
except to the extent failure to have such license, title or interest could not
reasonably be expected to, individually or in the aggregate, have a Material
Adverse Effect, provided, however, no representation is made in this Section
5.01(f) with respect to any matter covered by the representation in 5.01(g).

                  (g) Title to Database. The Company or NavTech North America
has title to the Database and has valid and existing licenses to any copyrights
covering data incorporated in the Database, except where the failure to have
such a license could not reasonably, individually or in the aggregate, be
expected to have a Material Adverse Effect or to impair the value, use or
exploitation of the Database in any material way, and the Company is not aware
of any claims that the Database infringes any rights of third parties; provided,
however, no representation is made with respect to any portions of the Database
relating solely to any European country.

                                      -13-

<PAGE>

                  (h) The Security Agreements. The provisions of the Security
Agreements are effective to create in favor of Philips a valid, binding and
enforceable security interest in all right, title and interest of the Company
and NavTech North America in the Collateral described therein, and to the extent
contemplated in Sections 5(c) and 5(d) of the Security Agreements constitute a
fully perfected first and prior security interest, lien or mortgage, in all
right, title and interest of the Company and NavTech North America in such
collateral, superior in right to any liens, except liens, if any, permitted to
be prior hereunder or under any Credit Document, existing or future (except,
with respect to future liens, as otherwise provided in the applicable Uniform
Commercial Code), which the Company, NavTech North America or any third Person
may have against such Collateral or interests therein.

                  (i) Percentage of Outstanding Capital Stock. Philips is the
recordholder of in excess of 70% of the outstanding shares of capital stock of
the Company, and Philips and SEI are, together, the recordholders of in excess
of 80% of the outstanding shares of capital stock of the Company, both as
reflected on the books of the Company, or its transfer agent, as of the date
hereof.

                                   ARTICLE VI.

                              CONDITIONS OF LENDING

                  Section 6.01. Conditional Provision of Term Note Loans. The
obligations of Philips to provide Term Note Loans (including the Initial Term
Note Loan) shall be subject to the satisfaction or waiver by Philips of the
following conditions:

                  (a)  Execution of Agreement.  Philips shall have received
         this Agreement duly executed and delivered by the Company.

                  (b) Security Agreements. The Security Agreements shall be in
         full force and effect and no further filings shall be required in order
         for Philips to maintain its first priority security interest in the
         Collateral with respect to amounts owed to Philips pursuant to this
         Master Loan Agreement, as amended and restated, to the same extent as
         existed with respect to amounts owed to Philips under the Original
         Master Loan Agreement. Prior to the provision of the Initial Term Note
         Loan, the Company and NavTech North America shall have acknowledged and
         consented to the amendments to the Original Master Loan Agreement as
         set forth herein and shall have agreed that the Company's obligations
         to Philips under this Master Loan Agreement as so amended will comprise
         Secured Obligations of the Company for all purposes under the Company
         Security Agreement and the NavTech North America Security Agreement,
         respectively, by affixing their

                                      -14-

<PAGE>

         respective signatures to the acknowledgments and consents set forth
         following the signature page hereof.

                  (c) Secretary's Certificate. Philips shall have received
         certified copies of all Board actions taken by the Company to authorize
         this Agreement (including the amendment hereof), the Warrant Agreement
         and the Ancillary Agreements.

                  (d) Opinions of Company Counsel. Philips shall have received
         favorable written opinions of outside counsel for the Company, dated
         the date of the Initial Term Note Loan, in form and substance
         reasonably satisfactory to Philips.

                  (e) Notice. For each Term Note Loan other than the Initial
         Term Note Loan (i) Philips shall have received from the Company, by not
         later than 10:00 a.m. (New York City time) on a date which is at least
         five Business Days prior to the date on which the Company requests such
         Term Note Loan to be made, a written request for the making of a Term
         Note Loan substantially in the form of Exhibit B and (ii) Philips shall
         have received from the Company a certificate signed by an authorized
         officer of the Company certifying that the proceeds of such Loan will
         be used in accordance with the provisions of Section 5.01(e).

                  (f)  No Default.  No Default or Event of Default shall have
         occurred and be continuing.

                  (g) Representations and Warranties; Covenants. The
         representations and warranties contained in Article V shall have been
         true when made and shall be true and correct with the same effect as
         though such representations and warranties had been made at the time of
         such Term Note Loan and the Company shall have complied with all of its
         covenants and agreements under this Agreement.

                  (h) Warrant Agreement. Prior to the date of the Initial Term
         Note Loan, the Warrant Agreement in substantially the form attached
         hereto as Exhibit C shall have been duly executed and delivered to
         Philips by the Company.

                  (i) Issuance of Warrants. Concurrently with each provision of
         Term Note Loans (including the Initial Term Note Loan, other than in
         respect of the amount of outstanding Demand Note Loans (including all
         amounts in respect of capitalized interest and accrued but not
         capitalized interest thereon) made by Philips to the Company hereunder
         prior to April 1, 1997), the Company shall have duly executed and
         delivered to Philips certificates for Warrants exercisable for the
         number of shares of Common Stock provided in Section 2.03, and any
         additional certificates for Warrants required in connection with any
         adjustments as provided in the Warrant Agreement.

                                      -15-

<PAGE>

                  (j) Amendment of Certificate of Incorporation. Prior to the
         date of the Initial Term Note Loan and subsequent to the filings, if
         any, and the expiration or earlier termination of the waiting period,
         if any, under subsection 6.01(m), the Certificate of Incorporation of
         the Company shall have been amended and restated by filing an Amended
         and Restated Certificate of Incorporation in substantially the form
         attached hereto as Exhibit D, and Philips shall have received a copy of
         such Amended and Restated Certificate of Incorporation, certified by
         the Secretary of State of the State of Delaware.

                  (k) Amendment of Previous Agreements. Prior to the date of the
         Initial Term Note Loan, Philips shall have received (i) the Agreement
         to Terminate the Investor Rights Agreement in the form attached hereto
         as Exhibit E-1, duly executed and delivered by sufficient parties
         thereto for it to be effective, (ii) Amendment No. 2 to the 1994 Stock
         Purchase Agreement in the form attached hereto as Exhibit E-2, duly
         executed and delivered by the parties thereto and (iii) Amendment No. 4
         to the 1996 Stock Purchase Agreement in the form attached hereto as
         Exhibit E-3, duly executed and delivered by the parties thereto.

                  (l) Amendment to Bylaws. Prior to the date of the Initial Term
         Note Loan, the Company shall have amended its Bylaws by duly adopting
         resolutions in substantially the form attached hereto as Exhibit F, and
         Philips shall have received a certified copy of such Bylaws, as
         amended.

                  (m) HSR Filing. Prior to the date of the Initial Term Note
         Loan, unless Philips and the Company shall conclude that no such
         filings are necessary, Philips and the Company shall have filed all
         documentary materials required by, or deemed by Philips and the Company
         to be necessary under, the Hart-Scott-Rodino Antitrust Improvements Act
         of 1976, as amended (the "HSR Act"), including any notification and
         report form required under the HSR Act, with respect to the conversion
         of Preferred Stock held by Philips into Common Stock, and the waiting
         period required by the HSR Act, including any extensions thereof
         obtained by request or other action by the Federal Trade Commission
         ("FTC") or the Antitrust Division of the Department of Justice
         ("Antitrust Division"), shall have expired or been earlier terminated
         by the FTC or the Antitrust Division.

                  (n) Escrow Agreement. The Escrow Agreement shall be in full
         force and effect and no amendments or modification thereto shall be
         required in order for Philips to receive the full benefit of such
         Agreement subsequent to the date hereof.

                  (o)  Other Documents.  Philips shall have received such other
         certificates and documents as Philips may reasonably require.

                                      -16-

<PAGE>

                  Section 6.02. Satisfaction of Conditions Precedent. Delivery
by the Company of a Term Note Loan request pursuant to Section 6.01(e) above
shall be deemed to constitute a certification of the Company that each of the
foregoing conditions precedent in this Article VI that has not been waived in
writing by Philips has been satisfied.

                                  ARTICLE VII.

                                    COVENANTS

                  Section 7.01. Affirmative Covenants. So long as any amount
under any Term Note is outstanding and until payment in full of the Term Notes
and all reimbursement obligations and performance of all other obligations of
the Company hereunder, the Company will:

                  (a) Financial Statements. Furnish to Philips upon the
execution of this Agreement and on a weekly basis thereafter (i) a 90 day
forecast of the consolidated cash position of the Company and (ii) a current
schedule of all accounts payable of the Company that have been deferred.

                  (b) Authorizations. Obtain when required, make and keep in
full force and effect all authorizations from and registrations with
Governmental Authorities and other persons that may be required for the validity
or enforceability of the Credit Documents and any Liens created by the Credit
Documents.

                  (c) Inspection. Upon reasonable prior notice, permit Philips
to have one or more of their officers and employees, or any other Person
designated by Philips, visit and inspect any of the properties of the Company or
any Affiliated Entity and to examine the Database, the corporate records, minute
books, books of account and other records of the Company or any Affiliated
Entity and make copies thereof or extracts therefrom, and discuss its affairs,
finances and accounts with the Company and, at the request of Philips, with the
Company's independent accountants, during normal business hours and at such
other reasonable times and as often as Philips may reasonably desire.

                  Philips agrees that, to the extent that the information
therein contained has not theretofore otherwise been disclosed by the Company or
any of its Affiliated Entities in such a manner as to render such information
not confidential or except to the extent that such information has otherwise
become publicly available or known to Philips other than by disclosure by or on
behalf of the Company, Philips will use its reasonable best efforts to, and
cause its employees, agents, attorneys, consultants,

                                      -17-

<PAGE>

directors and accountants to, maintain the confidential nature of the
information therein contained; provided, that anything herein to the contrary
notwithstanding, Philips may disclose or disseminate such information to: (a)
its employees, agents, attorneys, consultants, directors and accountants in the
course of the performance of their duties; or (b) such third parties as Philips
may, in its reasonable discretion, deem reasonably necessary or desirable in
connection with or in response to (i) compliance with any law, ordinance or
governmental order, regulation, rule policy, subpoena, investigation, or
regulatory authority request, or (ii) any order, decree, judgment, subpoena,
notice of discovery or similar ruling or pleading issued, filed, served or
purported on its face to be issued, filed or served (x) by or under authority of
any court, tribunal, arbitration board or any governmental or industry agency,
commission, authority, board or similar entity or (y) in connection with any
proceeding, case or matter pending (or on its face purported to be pending)
before any court, tribunal, arbitration board or any governmental or industry
agency, commission, authority, board or similar entity. In addition, information
may be disclosed to the extent necessary or reasonably believed advisable by
Philips or its affiliates to comply with applicable securities laws and
regulations and stock exchange requirements.

                  (d) Maintenance of Databases. Maintain, preserve and protect
the Database and all contracts, franchises, licenses, copyrights, patents and
trademarks related to the Database in a manner consistent with past practices,
so that the business carried on in connection therewith may be properly and
advantageously conducted at all times.

                  (e) Conduct of Business. Continue to conduct in all material
respects the principal businesses of the Company.

                  (f) Notification of Defaults. Promptly notify Philips upon the
discovery by the Company of the occurrence of any Default or Event of Default
hereunder or of any Default under the Security Agreements.

                  (g) Alternative Financing Sources. At any time and from time
to time upon request by Philips the Company will use its best efforts to obtain
alternative sources of financing on terms the Board determines are reasonable,
the use of the proceeds of which will be available (x) to repay outstanding
Loans made by Philips hereunder pursuant to Section 2.06 or (y) for working
capital to finance the Company's operations.

                  Section 7.02. Negative Covenants. So long as any amount under
any Term Note is outstanding, including amounts in respect of capitalized
interest and accrued but not capitalized interest, and until payment in full of
the Term Notes and performance of all other obligations of the Company
hereunder, the Company will not and will not permit any Affiliated Entity to:

                  (a) Borrowing.  Except Indebtedness secured by Permitted
Encumbrances, create,
incur, assume or suffer to exist any Indebtedness.

                  (b) Mortgages and Pledges. Create, incur, assume or suffer to
exist any Lien of any kind upon or in any of its property or assets whether now
owned or hereafter acquired, except Permitted Encumbrances and except for any
Liens created by the Security Documents.

                  (c) Sales of Database. Sell, license or otherwise dispose of
any part of the Database, except that the Company may grant non-exclusive
licenses in the ordinary course of business.

                  (d) Contingent Liabilities. Assume, guarantee, endorse,
contingently agree to purchase or otherwise become liable upon the obligation of
any other Person.

                                      -18-

<PAGE>

                  (e) Loans and Investments. Purchase or acquire the obligations
or stock of, or any other interest in, or make loans or advances to, any Person
other than a wholly-owned subsidiary, except (i) direct obligations of the
United States of America with a maturity not exceeding one year, (ii) time
deposits, certificates of deposit, eurodollar time deposits, bankers acceptances
or eurodollar certificates of deposits with a maturity not exceeding one year
issued by a commercial bank having a combined capital and surplus of at least
$500 million, chartered under the laws of the United States or one of the States
thereof and a member of the Federal Reserve System, (iii) commercial paper with
a minimum rating of A1/P1 or the equivalent thereof, (iv) repurchase agreements
with member banks of the Federal Reserve System and primary dealers limited to
United States government securities, provided that the market value of the
securities used as collateral for such repurchase agreements must equal or
exceed the principal and interest due under such repurchase agreements and (v)
advances to suppliers other than SEI and its affiliates made in the ordinary
course of business.

                  (f) Capital Expenditures. From the date hereof, make any
Capital Expenditures other than as provided for in a business plan and budget
approved by the Board and in effect at the time of the expenditure.

                  (g) Distributions to Stockholders. Declare or pay, in cash or
otherwise, any distributions to Stockholders.

                  (h) Issuance or Sale of Stock. Except pursuant to agreements
listed in Schedule 7.02(h) or as approved by the Board with the concurrence of a
majority of the directors of the Company who are executives of Philips or its
Affiliated Entities, issue capital stock, or options to acquire capital stock,
of the Company or in any corporation controlled by the Company.

                  (i) Affiliate Transactions. Except with the prior written
consent of Philips and except pursuant to existing contracts previously approved
by NavTech's board of directors, enter into any transactions with Affiliated
Entities other than (i) as contemplated by the Credit Documents or (ii) on terms
not less favorable to the Company than could be obtained on an arm's-length
basis.

                                      -19-

<PAGE>

                  Section 7.03. Philips Covenants. (a) Unless and until there
shall have occurred and be continuing an Event of Default, Philips hereby grants
the Company the exclusive royalty free right and license, including the right to
sublicense, under and to all patents conveyed to Philips pursuant to the
Collateral Assignments (as defined in the Security Agreements) relating to
patents, made by the Company in favor of Philips (the "Patent Assignment"), to
make, have made for it, use, and sell the inventions disclosed and claimed in
such patents.

                  (b) The Company and Philips hereby agree that from the date
hereof until the earlier to occur of (i) the Termination Date, at which time the
patents conveyed to Philips pursuant to the Patent Assignment will be reconveyed
to the Company, or (ii) an Event of Default, Philips will not sell, assign,
transfer, license or otherwise exploit (commercially or otherwise), except in
accordance with or as may be permitted by any written licenses or other written
agreements between NavTech and any Person within the Philips Group, any rights
under such patents to any Person other than to a Person within the Philips Group
who agrees to be bound by the restrictions included in this Section 7.03(b).

                  (c) The Company and Philips agree that as soon as practicable
following the Termination Date, Philips shall (i) take all actions necessary to
release the security interests granted to it by the Security Agreement and the
other Security Documents, and (ii) reconvey to the Company or NavTech North
America all patents assigned to Philips as collateral security for the Secured
Obligations.

                  Section 7.04. Further Assurances. At any time and from time to
time, upon the written request of Philips, and at the sole expense of the
Company, the Company will promptly and duly execute and deliver and cause any of
its direct or indirect subsidiaries to execute and deliver any and all such
further instruments and documents and take such further action as Philips may
reasonably deem necessary to obtain the full benefits of this Agreement, any of
the other Credit Documents, and of the rights and powers herein and therein
granted, including any documents necessary to grant Philips a perfected first
priority security interest in any assets or properties of the Company or any of
its direct or indirect subsidiaries on which the Credit Documents do not already
grant Philips Liens.

                                  ARTICLE VIII.

                                EVENTS OF DEFAULT

                  Section 8.01. Events of Default. If one or more of the
following events (each, an "Event of Default") shall occur:

                                      -20-

<PAGE>

                  (a) Default shall be made in the payment of interest or
         principal of any Note when due and payable, whether at maturity,
         pursuant to demand, by notice of intention to prepay or otherwise; or

                  (b) Default shall be made in the due observance or
         performance of any term, covenant, or agreement contained in the
         Security Agreements; or

                  (c) Default shall be made in the due observance or performance
         of any term, covenant or agreement contained in this Agreement or the
         Warrant Agreement, and such default shall have continued unremedied for
         a period of 10 days after any officer or director of the Company has
         received written notice from Philips of such default; or

                  (d) Any representation or warranty made or deemed made by the
         Company herein or any statement or representation made in any
         certificate or report delivered by or on behalf of the Company in
         connection herewith or in connection with any Credit Document shall
         prove to have been false or misleading in any material respect when
         made; or

                  (e) Any obligation (other than its obligation hereunder) of
         the Company or any Affiliated Entity for the payment of Indebtedness
         which is outstanding in a principal amount exceeding $500,000 is not
         paid within 5 days of the date when due, after giving effect to any
         applicable grace period, if any, specified in any instrument evidencing
         such Indebtedness, or becomes or is declared to be due and payable
         prior to the expressed maturity thereof, or there shall have occurred
         an event which would cause any such obligation to become, or give the
         holder of any such obligation a present right to declare such
         obligation to be, due and payable; or

                  (f) An involuntary case or other proceeding shall be commenced
         against the Company or any Affiliated Entity seeking liquidation,
         reorganization or other relief with respect to it or its debts under
         any applicable Federal or State bankruptcy, insolvency, reorganization
         or similar law now or hereafter in effect or seeking the appointment of
         a custodian, receiver, liquidator, assignee, trustee, sequestrator or
         similar official of it or any substantial part of its property, and
         such involuntary case or other proceeding shall remain undismissed and
         unstayed, or an order or decree approving or ordering any of the
         foregoing shall be entered and continued unstayed and in effect, in any
         such event, for a period of 60 days; or

                                      -21-

<PAGE>

                  (g) The commencement by the Company or any Affiliated Entity
         of a voluntary case or proceeding under any applicable Federal or State
         bankruptcy, insolvency, reorganization or other similar law or of any
         other case or proceeding to be adjudicated a bankrupt or insolvent, or
         the consent by any of them to the entry of a decree or order for relief
         in respect of the Company or any Affiliated Entity in an involuntary
         case or proceeding under any applicable Federal or State bankruptcy,
         insolvency, reorganization or other similar law or to the commencement
         of any bankruptcy or insolvency case or proceeding against any of them,
         or the filing by any of them of a petition or answer or consent seeking
         reorganization or relief under any applicable Federal or State law, or
         the consent by any of them to the filing of such petition or to the
         appointment of or taking possession by a custodian, receiver,
         liquidator, assignee, trustee, sequestrator or similar official of the
         Company or any substantial part of its respective property, or the
         making by any of them of an assignment for the benefit of creditors, or
         the admission by any of them in writing of inability to pay their debts
         generally as they become due, or the taking of action by the Company or
         any Affiliated Entity in furtherance of any such action; or

                  (h) One or more judgments against the Company or any
         Affiliated Entity or attachments against their respective properties,
         which in the aggregate exceed $500,000, or the operation or result of
         which could reasonably be expected to interfere materially and
         adversely with the conduct of the business of the Company, remain
         unpaid, unstayed on appeal, undischarged, unbonded, or undismissed for
         a period of 30 days; or

                  (i) Any court or governmental or regulatory authority shall
         have enacted, issued, promulgated, enforced or entered any statute,
         rule, regulation, judgment, decree, injunction or other order (whether
         temporary, preliminary or permanent) which is in effect and which
         prohibits, enjoins or otherwise restricts, in a manner that could
         reasonably be expected to have a Material Adverse Effect, any of the
         transactions contemplated under the Credit Documents;

then upon the happening of any of the foregoing Events of Default which shall be
continuing, the Notes shall become and be immediately due and payable without
declaration or notice to the Company. The Company expressly waives any
presentment, demand, protest or other notice of any kind.

                                      -22-

<PAGE>

                                   ARTICLE IX.

                                   CONVERSION

                  Section 9.01. Optional Conversion. (a) Any amounts outstanding
under any Term Note, including amounts in respect of capitalized interest and
accrued but not capitalized interest, shall be convertible at the option of
Philips into any debt securities sold by the Company at any time.

                  (b) The conversion of amounts outstanding under any Term Note
pursuant to the provisions of this Section 9.01 shall not obligate Philips to
convert all such outstanding amounts under such Term Note nor any amounts
outstanding under any other Term Note.

                  Section 9.02. Conversion Rate. If Philips elects to convert
any amounts outstanding under any Note into debt securities of the Company
pursuant to the provisions of Section 9.01, then the principal amount of such
debt securities into which each Term Note is convertible shall be equal to the
aggregate amount which Philips elects to convert divided by the net price per $1
principal amount of such debt securities received by the Company upon issuance
of such debt securities.

                  Section 9.03. Sale of Securities. The Company shall provide
Philips notice five Business Days prior to any sale of any debt securities of
the Company. Upon any authorization of securities to be sold, the Company will
authorize a sufficient number of such securities to enable Philips to convert
all amounts then outstanding under any Notes. Within five Business Days after
receipt of the Company's notice to the effect that it is selling any such
securities, Philips will inform the Company of the amount, if any, outstanding
under any of the Term Notes which Philips elects to convert into such
securities.

                  Section 9.04. Conversion Procedures. Upon the Company's
receipt of Philips' notice that it elects to convert amounts outstanding,
including amounts in respect of capitalized interest and accrued but not
capitalized interest, under any of the Term Notes into such amount and type of
securities pursuant to Section 9.01 and 9.02 hereof, such amounts shall be
deemed converted into such amount and type of securities upon the later to occur
of (i) the first sale of such securities by the Company and (ii) the Company's
receipt of such notice. Promptly after surrender by Philips of the outstanding
Term Notes representing the amounts so converted, the Company shall deliver to
Philips (i) such amount and type of securities duly issued to Philips and
registered in the name of Philips or its designee and (ii) a duly executed Term
Note representing any amounts outstanding, including amounts in respect of
capitalized interest and accrued but not capitalized interest, on Term Notes
surrendered by Philips but which Philips did not elect to convert.

                                      -23-

<PAGE>

                                   ARTICLE X.

                                  MISCELLANEOUS

                  Section 10.01. GOVERNING LAW; SUBMISSION TO JURISDICTION;
SELECTION OF FORUM. THE AGREEMENT SHALL BE GOVERNED BY THE LAWS OF THE STATE OF
NEW YORK, WITHOUT GIVING EFFECT TO PRINCIPLES OF CONFLICTS OF LAWS THEREOF. EACH
PARTY HERETO AGREES THAT IT SHALL BRING ANY ACTION OR PROCEEDING IN RESPECT OF
ANY CLAIM ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS
CONTAINED IN OR CONTEMPLATED BY THIS AGREEMENT, WHETHER IN TORT OR CONTRACT OR
AT LAW OR IN EQUITY, EXCLUSIVELY IN THE UNITED STATES DISTRICT COURT FOR THE
SOUTHERN DISTRICT OF NEW YORK OR THE SUPREME COURT OF THE STATE OF NEW YORK FOR
THE COUNTY OF NEW YORK (THE "CHOSEN COURTS") AND SOLELY IN CONNECTION WITH
CLAIMS ARISING UNDER THIS AGREEMENT OR THE TRANSACTIONS CONTAINED IN OR
CONTEMPLATED BY THIS AGREEMENT (I) IRREVOCABLY SUBMITS TO THE EXCLUSIVE
JURISDICTION OF THE CHOSEN COURTS, (II) WAIVES ANY OBJECTION TO LAYING VENUE IN
ANY SUCH ACTION OR PROCEEDING IN THE CHOSEN COURTS, (III) WAIVES ANY OBJECTION
THAT THE CHOSEN COURTS ARE AN INCONVENIENT FORUM OR DO NOT HAVE JURISDICTION
OVER ANY PARTY HERETO AND (IV) AGREES THAT SERVICE OF PROCESS UPON SUCH PARTY IN
ANY SUCH ACTION OR PROCEEDING SHALL BE EFFECTIVE IF NOTICE IS GIVEN IN
ACCORDANCE WITH SECTION 10.06 OF THIS AGREEMENT.

                  THE COMPANY IS EXECUTING THIS AMENDED AND RESTATED MASTER LOAN
AGREEMENT AND WILL ISSUE THE NOTES AND WARRANTS CONTEMPLATED HEREIN IN THE STATE
OF ILLINOIS AND IS DELIVERING THIS AMENDED AND RESTATED MASTER LOAN AGREEMENT
AND WILL DELIVER SUCH NOTES AND WARRANTS TO PHILIPS IN THE STATE OF NEW YORK.

                  Section 10.02. Expenses. The Company agrees to pay (i) all
expenses related to the Escrow Agreement, including all costs associated with
verification of the materials delivered to the Escrow Agent to the extent such
costs do not exceed $10,000, and (ii) all reasonable out-of-pocket expenses
incurred by Philips, including reasonable fees and disbursements of counsel, in
connection with Philips' administration and enforcement of any provisions, of
this Agreement, the other Credit Documents or any amendment or supplement hereto
or thereto.

                  Section 10.03. Amendments. Any provision of this Agreement,
the Term Notes or the other Credit Documents may be amended or waived, or a
consent to a variance therefrom given, if, but only if, such amendment or waiver
is in writing and is

                                      -24-

<PAGE>

signed by the Company and Philips or such consent is signed by and as an
authorized officer or attorney-in-fact of the party giving the consent.

                  Section 10.04. Term; Termination Date. Notwithstanding
anything else herein, this amendment and restatement of the Master Loan
Agreement shall have no force and effect unless and until the provision of the
Initial Term Note Loan as provided herein. At any time when all amounts owing to
Philips under the Notes and the other Credit Documents have been paid in full
or, in the case of amounts owing under the Term Notes, converted into other
securities of the Company, including all expenses to be paid by the Company,
this Agreement shall terminate on the date (the "Termination Date") that is five
days after the date on which Philips receives notice from the Company to the
effect that the Company wishes to terminate this Agreement; provided, however,
that Philips' covenant contained in Section 7.03 hereof shall survive the
Termination Date.

                  Section 10.05. Cumulative Rights and No Waiver. Each and every
right granted to Philips hereunder or under any other document delivered
hereunder or in connection herewith, or allowed them by law or equity, shall be
cumulative and may be exercised from time to time. No failure on the part of
Philips to exercise, and no delay in exercising, any right will operate as a
waiver thereof, nor will any single or partial exercise by Philips of any right
preclude any other or future exercise thereof or the exercise of any other
right.

                  Section 10.06. Notices. Any communication, demand or notice to
be given hereunder or with respect to any Note will be duly given when delivered
in writing or by telecopy to a party at its address as indicated below.

                  A communication, demand or notice given pursuant to this
Section 10.06 shall be addressed:

                  If to the Company, at

                           10400 W. Higgins Road, Suite 400
                           Rosemont, IL  60018
                           Telecopy:            (847) 699-8057
                           Attention:           General Counsel

                           with a copy to

                           Wilson Sonsini Goodrich & Rosati
                           650 Page Mill Road
                           Palo Alto, California 94304
                           Telecopy:            (415) 493-6811
                           Attention:           Donna M. Petkanics

                                      -25-

<PAGE>

                  If to Philips, at

                           Philips Media Services B.V.
                           c/o Philips Electronics North America Corp.
                           100 East 42nd Street
                           New York, New York   10017
                           Telecopy:            (212) 850-7304
                           Attention:           Samuel J. Rozel
                                                William E. Curran

                           with a copy to

                           Sullivan & Cromwell
                           125 Broad Street
                           New York, New York  10004
                           Telecopy:            (212) 558-3588
                           Attention:           W. Loeber Landau

                  Section 10.07. Separability. In case any one or more of the
provisions contained in this Agreement shall be invalid, illegal or
unenforceable in any respect under any law, the validity, legality and
enforceability of the remaining provisions contained herein shall not in any way
be affected or impaired thereby.

                  Section 10.08. Assignments and Participations. This Agreement
shall be binding upon and inure to the benefit of the Company and Philips and
their respective successors and assigns, except that neither the Company nor
Philips may assign or participate any rights or obligations hereunder; provided,
however, that Philips shall be permitted to assign any of its rights and
obligations hereunder to any member of the Philips Group.

                  Section 10.09. WAIVER OF JURY. THE COMPANY AND PHILIPS HEREBY
WAIVE TRIAL BY JURY IN ANY JUDICIAL PROCEEDING INVOLVING, DIRECTLY OR
INDIRECTLY, ANY MATTER (WHETHER SOUNDING IN TORT, CONTRACT OR OTHERWISE) IN ANY
WAY ARISING OUT OF, RELATED TO, OR CONNECTED WITH THIS AGREEMENT, THE NOTES OR
THE RELATIONSHIPS ESTABLISHED HEREUNDER.

                  Section 10.10. Execution in Counterparts. This Agreement may
be executed by the parties on separate counterparts which, when taken together
with counterparts signed by each of the other parties, shall constitute a single
fully executed Agreement which shall be as fully binding and effective as if
each party had executed a single signature page.

                                      -26-

<PAGE>

                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed as of the date first above written.

                        NAVIGATION TECHNOLOGIES CORPORATION

                        By /s/ Ronald A. Brumback
                           --------------------------------------------------
                        Name:  Ronald A. Brumback
                        Title: President

                        By /s/ Thomas A. Lerone
                           --------------------------------------------------
                        Name:  Thomas A. Lerone
                        Title: Vice President & Chief Financial Officer

                        PHILIPS MEDIA SERVICES B.V.

                        By /s/ Samuel J. Rozel
                           ------------------------------------------------
                           Samuel J. Rozel
                           Attorney-in-fact pursuant to Power of Attorney

<PAGE>

NavTech North America hereby agrees for the benefit of Philips that it will use
all reasonable efforts within its control to assure compliance by the Company
with the covenants contained in Sections 7.01(d), 7.01(e), 7.02(b) and 7.02(c)
hereof, and it hereby agrees that it will not take any actions inconsistent with
the covenants contained in such sections.

                       NAVIGATION TECHNOLOGIES NORTH
                                AMERICA, INC.

                       By /s/  Thomas A. Lerone
                          ---------------------------------------------------
                          Name: Thomas A. Lerone
                                Title: Vice President & Chief Financial Officer

<PAGE>

NAVIGATION TECHNOLOGIES CORPORATION, a Delaware company (the "Company"), as a
party to the Security Agreement, dated October 22, 1996, between the Company and
Philips Media Services B.V. ("Philips"), hereby acknowledges and consents to the
foregoing amendment and restatement, dated as of April 1, 1997, of the Original
Master Loan Agreement referred to therein, and agrees that the Company's
obligations to Philips under the Master Loan Agreement as so amended will
comprise Secured Obligations of the Company for all purposes under such Security
Agreement.

                        NAVIGATION TECHNOLOGIES CORPORATION

                        By: /s/ Ronald A. Brumback
                            -------------------------------------------------
                        Name:  Ronald A. Brumback
                        Title: President

                        By: /s/ Thomas A. Lerone
                            -------------------------------------------------
                        Name:  Thomas A. Lerone
                        Title: Vice President & Chief Financial Officer

NAVIGATION TECHNOLOGIES NORTH AMERICA, INC., a Delaware corporation ("NavTech
North America"), as a party to the Security Agreement, dated October 22, 1996,
between NavTech North America and Philips Media Services B.V. ("Philips"),
hereby acknowledges and consents to the foregoing amendment and restatement
dated as of April 1, 1997, of the Original Master Loan Agreement between
Navigation Technologies Corporation, a Delaware corporation (the "Company"),
and Philips referred to therein, and agrees that the Company's obligations to
Philips under the Master Loan Agreement as so amended will comprise Secured
Obligations of the Company for all purposes under such Security Agreement.

                        NAVIGATION TECHNOLOGIES NORTH
                                           AMERICA, INC.

                        By /s/ Thomas A. Lerone
                           --------------------------------------------------
                        Name:  Thomas A. Lerone
                        Title: Vice President & Chief Financial Officer

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