June 10, 1999

Mr. Roderick K. Porter

Acting Chief of the International Bureau

Federal Communications Commission

Washington, D.C. 20554

Dear Mr. Porter:

The National Telecommunications and Information Administration on behalf
of the Executive Branch Agencies, has approved the release of additional
proposals for WRC-2000. These proposals are being forwarded to your
WRC-2000 Advisory Committee for review. Karl Nebbia from my staff will
contact Damon Ladson and reconcile any differences. The following is a
summary of our proposals:

> **WRC-2000 Agenda Item 1.4 -** Resolution **134 (WRC-97)** makes the
> date of the provisional application of the allocation to the FSS in
> Regions 1 and 3 in the band 40.5-42.5 GHz 1 January 2001, and calls
> for review of the allocation and provisional application date. The
> original proposal concerning this issue was drafted by your Advisory
> Committee and was reviewed and modified by our Radio Conference
> Subcommittee. Due to the results of the work completed by ITU-R
> Working Party 4A, a new version of this proposal has been drafted.
>
> **WRC-2000 Agenda Item 1.4 -** This proposal looks at WRC-97\'s
> realignment of the 50.2-71 GHz spectral region, which placed a primary
> allocation to the fixed service in the frequency band 55.78-59 GHz.
> Issues related to sharing between high density fixed systems and the
> Earth Exploration-Satellite (passive) Service in the 55.78-56.26 GHz
> band have not been resolved. Our proposal addresses Resolution **726
> (WRC-97)** and recommends some changes to this resolution, including
> the continuation of studies.
>
> **WRC-2000 Agenda Item 1.7** - This agenda items reviews the use of
> the HF bands by the aeronautical mobile (R) and maritime mobile
> services with a view to protecting operational, distress and safety
> communications, taking into account Resolution **346** (WRC-97). We
> previously submitted a proposal that looked at the aeronautical
> portion of this agenda item. This proposal addresses the maritime HF
> issues.
>
> **WRC-2000 Agenda Item 1.15.1 -** The recommended allocation proposal
> for the second civil radionavigation satellite allocation consists of
> modification to an existing footnote, **S5.328,** to allocate the
> Radionavigation Satellite Service (RNSS) at 1 164-1 188 MHz.
>
> **WRC-2000 Agenda Item 1.18 -** Appendix **S18** of the ITU Radio
> Regulations defines the channels of the maritime mobile service. This
> proposal modifies Resolution **342** to allow consideration of one or
> more new interoperable technologies, digital or otherwise, for the
> maritime mobile service. The document also proposes the ITU-R studies
> take into account the existing Appendix **S18** channeling plan in
> order to minimize disruption of and provide for interoperability with
> current systems.
>
> Sincerely,
>
> *Original Signed*
>
> William T. Hatch
>
> Acting Associate Administrator
>
> Office of Spectrum Management

Enclosures:

United States of America

\[DRAFT\] PROPOSALS FOR THE WORK OF THE CONFERENCE

# Proposals for Agenda Item 1.4[^1]

## to consider issues concerning allocations and regulatory aspects related to Resolutions 126 (WRC-97), 128 (WRC-97), 129 (WRC-97), 133 (WRC-97), 134 (WRC-97) and 726 (WRC-97)

**Background Information: Resolution** **134 (WRC-97)** makes the date
of the provisional application of the allocation to the FSS in Regions 1
and 3 in the band 40.5-42.5 GHz 1 January 2001, and calls for review of
the allocation and provisional application date. On the basis of studies
conducted in the ITU-R, it is appropriate to advance the date of the
application of the FSS allocation in Regions 1 and 3 to 2 June 2000
(upon the conclusion of WRC-2000) [for the 40.5-41.5 GHz
band]{.underline}, and to extend ~~the~~ [this]{.underline} allocation
to all of Region 1 (thereby enabling the removal of RR **S5.551C,** RR
**S5.551D** and RR **S5.551E**, and the suppression of Resolution **134
(WRC-97)**). [Based on the ITU-R WP 4A contribution to the WRC-00 CPM
that protecting the Radio Astronomy Service to the levels specified in
existing ITU-R recommendations would mean a commercially impracticable
FSS service, it is also appropriate to delete the allocation to the FSS
worldwide in the 41.5-42.5 GHz band and suppress Resolution
128.]{.underline}

On the basis of these conclusions, the following proposals are made:

Article S5

GHz

40.5-41.5

  -----------------------------------------------------------------------
  Allocation to Services

  -----------------------------------------------------------------------

+------------------------+------------------------+--------------------+
| Region 1               | Region 2               | Region 3           |
+------------------------+------------------------+--------------------+
| 40.5-4                 | 40.5-4                 | 40.5-4[1]{         |
| [1]{.underline}~~2~~.5 | [1]{.underline}~~2~~.5 | .underline}~~2~~.5 |
|                        |                        |                    |
| FIXED                  | FIXED                  | FIXED              |
|                        |                        |                    |
| [FIXED-                | FIXED-SATELLITE        | FIXED-SATELLITE    |
| SATELLITE]{.underline} |                        |                    |
|                        | (space-to-Earth)       | (space-to-Earth)   |
| [(space-               |                        |                    |
| to-Earth)]{.underline} | ~~S5.551B~~            | ~~S5.551B~~        |
|                        | ~~S5.551E~~            | ~~S5.551E~~        |
| BROADCASTING           |                        |                    |
|                        | BROADCASTING           | BROADCASTING       |
| BROADCASTING-          |                        |                    |
|                        | BROADCASTING-          | BROADCASTING-      |
| SATELLITE              |                        |                    |
|                        | SATELLITE              | SATELLITE          |
| Mobile                 |                        |                    |
|                        | Mobile                 | Mobile             |
| ~~S5.551B~~            |                        |                    |
| ~~S5.551D~~            | S5.551C ~~S5.551F~~    | S5.551C            |
|                        |                        | ~~S5.551F~~        |
+------------------------+------------------------+--------------------+

**Reasons:** Studies in ITU-R confirm the feasibility of the
fixed-satellite service allocation in the bands ~~40.5-42.5~~ 40.5-41.5
GHz, and the need for harmonized global allocations. With the elevation
of the allocation to full primary status in all 3 regions, the footnote
allocation for countries in Region 1 can be removed. Those countries
that are listed or that have territories listed in RR **S5.551C** should
give consideration to whether the alternative allocation in certain
countries and territories in Regions 2 and 3 can be suppressed.
Acceleration of the effective date allows for removal of the reference
to Resolution **134 (WRC-97).** ~~In advancing this proposal, it must be
recognized that fixed-satellite service systems in the band 41.5-42.5
GHz may not be implemented until technical and operational measures have
been identified and agreed within ITU-R to protect the radio astronomy
service in the band 42.5-43.5 GHz from harmful interference.~~

Article S5

GHz

41.5-42.5

  -----------------------------------------------------------------------
  Allocation to Services

  -----------------------------------------------------------------------

+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
| 4~~0~~[               | 4~~0~~[               | 4~~0~~[               |
| 1]{.underline}.5-42.5 | 1]{.underline}.5-42.5 | 1]{.underline}.5-42.5 |
|                       |                       |                       |
| FIXED                 | FIXED                 | FIXED                 |
|                       |                       |                       |
| BROADCASTING          | ~~FIXED-SATELLITE~~   | ~~FIXED-SATELLITE~~   |
|                       |                       |                       |
| BROADCASTING-         | ~~(space-to-Earth)~~  | ~~(space-to-Earth)~~  |
|                       |                       |                       |
| SATELLITE             | ~~S5.551B~~           | ~~S5.551B~~           |
|                       | ~~S5.551E~~           | ~~S5.551E~~           |
| Mobile                |                       |                       |
|                       | BROADCASTING          | BROADCASTING          |
| ~~S5.551B~~           |                       |                       |
| ~~S5.551D~~           | BROADCASTING-         | BROADCASTING-         |
|                       |                       |                       |
|                       | SATELLITE             | SATELLITE             |
|                       |                       |                       |
|                       | Mobile                | Mobile                |
|                       |                       |                       |
|                       | ~~S5.551C~~           | ~~S5.551C~~ S5.551F   |
|                       | ~~S5.551F~~           |                       |
+-----------------------+-----------------------+-----------------------+

**Reasons:** [At the recently completed meeting of ITU-R Working Party
4A, dealing with FSS matters, submitted text regarding Resolution 128
and protection of the Radio Astronomy Service. This text, for addition
to Section 6.1.3.2.3 of the CPM Report, stated that "If the
fixed-satellite service is constrained to the levels of attenuation
contained in Table 1, it is unlikely to be practicable for the FSS
allocation in the frequency band 41.5-42.5 GHz to be used for commercial
FSS applications". As support for this allocation by the US was, at
WRC-97, and is contingent on protecting the Radio Astronomy Service from
harmful interference, deletion of the allocation to the FSS in this band
segment is necessary.]{.underline}

**~~S5.551D~~**

**Reasons:** Consequential to USA/1.4/01.

**~~S5.551E~~**

**Reasons:** Consequential to USA/1.4/01.

~~Resolution 134 (WRC-97)~~

~~Use of the frequency band 40.5-42.5 GHz~~

~~by the fixed-satellite service~~

**Reasons:** Consequential to USA/1.4/01.

~~RESOLUTION 128 (WRC-97)~~

~~Allocation to the fixed-satellite service (space-to-Earth) in the
41.5-42.5 GHz band and protection of the radio astronomy service in the
42.5-43.5 GHz band~~

**Reason[: ]{.underline}**[Consequential to USA/1.4/02. Additionally, WP
4A has indicated protection of the Radio Astronomy Service to the levels
indicated in the WP 7D input to the CPM Report on Resolution 128, values
derived from existing ITU-R recommendations noted in the WP 7D output
report, would mean the FSS allocation in the 41.5-42.5 GHz band would be
unlikely to be practicable for use for commercial FSS
applications.]{.underline}

**United States of America**

**\[DRAFT\] PROPOSALS FOR THE WORK OF THE CONFERENCE**

# Proposals for Agenda Item 1.4[^2]

## to consider issues concerning allocations and regulatory aspects related to Resolutions 126 (WRC-97), 128 (WRC-97), 129 (WRC-97), 130 (WRC-97), 134 (WRC-97), and 726 (WRC-97)

**Background Information:** WRC-97, in its realignment of the 50.2-71
GHz spectral region, placed a primary allocation to the fixed service in
the frequency band 55.78-59 GHz. Footnote **S5.547** and Resolution
**726 (WRC-97)** indicate that this band (among others) is available for
high-density applications in the fixed service.

With respect to 55.78-59 GHz, Resolution **726 (WRC-97)** resolves that
administrations should take into account that this band is available for
high density application in the fixed service, when considering
allocations or other regulatory provisions in relation to this band and
requests ITU-R

-   to undertake studies leading to the identification of system
    characteristics of high-density systems in the fixed service in
    55.78-59 GHz, and

-   to undertake, as a matter of urgency, studies of technical and
    operational criteria and of methods to facilitate sharing between
    high-density systems in the fixed service and other services in
    55.78-59 GHz.

Joint Rapporteur Group (JRG) 7D-9D has not resolved issues related to
sharing between high density fixed systems and the Earth
Exploration-Satellite (passive) Service in the 55.78-56.26 GHz band.
Therefore, the band needs to be removed from *consider j* of Resolution
**726 (WRC-97)**. Furthermore, the resolution needs to be modified to
indicate that *requests 1* and *2* continue to apply only to the
55.78-56.26 GHz band. This would continue the studies in that band.

**Proposal:**

**Section IV -- Table of Frequency Allocations**

55.78-56.9 GHz

  -----------------------------------------------------------------------
  Allocation to services

  -----------------------------------------------------------------------

  ----------------------- ----------------------- -----------------------
  Region 1                Region 2                Region 3

  ----------------------- ----------------------- -----------------------

+-----------------------------------------------------------------------+
| **55.78-56.[26]{.underline}~~9~~** EARTH EXPLORATION-SATELLITE        |
| (passive)                                                             |
|                                                                       |
| FIXED [S5.547]{.underline}                                            |
|                                                                       |
| INTER-SATELLITE S5.556A                                               |
|                                                                       |
| MOBILE S5.558                                                         |
|                                                                       |
| SPACE RESEARCH (passive)                                              |
|                                                                       |
| S5.557                                                                |
+-----------------------------------------------------------------------+
| **~~55.78~~[56.26]{.underline}-56.9** EARTH EXPLORATION-SATELLITE     |
| (passive)                                                             |
|                                                                       |
| FIXED [S5.547]{.underline}                                            |
|                                                                       |
| INTER-SATELLITE S5.556A                                               |
|                                                                       |
| MOBILE S5.558                                                         |
|                                                                       |
| SPACE RESEARCH (passive)                                              |
|                                                                       |
| S5.557                                                                |
+-----------------------------------------------------------------------+

**S5.547** The bands 31.8-33.4 GHz, 51.4-52.6 GHz,
~~55.78~~[56.26]{.underline}-59 GHz and 64-66 GHz are available for
high-density applications in the fixed service (see Resolution **726
(WRC-97)**.

**Reasons:** **S5.547** should be associated with the fixed service.
Also, ITU-R studies have shown that, without limitations on the power of
high-density applications in the fixed service in the band 55.78-56.26
GHz, unacceptable interference may occur to passive sensors onboard
Earth Exploration-Satellites. Further study is required to determine
whether limits on the fixed service are needed to protect EES passive
sensors.

RESOLUTION 726 (WRC-~~97~~[2000]{.underline})

Frequency bands above 30 GHz available for high-density applications in
the fixed service

The World Radiocommunication Conference (~~Geneva, 1997~~[Istanbul,
2000]{.underline}),

considering

*a)* that there is a dramatically increasing demand for high-density
applications in the fixed service resulting from the deployment of new
mobile networks and from the rapid worldwide deregulation in the
provision of local broadband services, including multimedia;

*b)* that the frequency range from 30 GHz to about 50 GHz is the range
preferred to satisfy initial requirements, as indicated in *considering*
*a)*, while the bands above about 50 GHz are preferred for similar
applications but which take technical advantage of high atmospheric
absorption;

*c)* that the lower part of the spectrum above 30 GHz has advantages for
the fixed service in areas where longer path lengths are necessary;

*d)* that the 38 GHz band is already heavily used by many
administrations for high-density applications in the fixed service;

*e)* that the needs of other services to which the relevant frequency
bands are already allocated must be taken into account;

*f)* that the band 37-37.5 GHz is being planned for use by the space
research service (space-to-Earth) to provide moon-to-Earth and planetary
communication links;

*g)* that the band 37-38 GHz is being planned for use by the space
research service to provide space based very long baseline
interferometry;

*h)* that the deployment of high-density applications in the fixed
service in some bands potentially presents sharing difficulties with
other primary services allocated to the same band, e.g. the
fixed-satellite service;

*i)* that operations in the space services, such as in the
fixed-satellite service, in those bands used by high-density
applications in the fixed service may lead to sharing difficulties;

*j)* that there is a need for global harmonization of new and existing
allocations of radio frequency bands to facilitate coordination between
administrations and encourage development of competitive products,
through economies of scale, and the worldwide introduction of new
telecommunication services, including the provision of reliable global
information infrastructure access at an affordable cost,

resolves

that administrations should take into account that the bands
31.8-33.4 GHz[^3], 51.4-52.6 GHz, ~~55.78~~[56.26]{.underline}-59 GHz
and 64-66 GHz are available for high-density applications in the fixed
service, when considering allocations or other regulatory provisions in
relation to these bands,

requests ITU-R

1 to undertake studies leading to the identification of system
characteristics of high-density systems in the fixed service in the
[55.78-56.26]{.underline} band~~s listed in the resolves~~;

2 to undertake, as a matter of urgency, studies of technical and
operational criteria and of methods to facilitate sharing between
high-density systems in the fixed service and other services in the
[55.78-56.26]{.underline} band~~s listed in the resolves~~,

urges administrations

to participate actively in the aforementioned studies by submitting
contributions to ITU-R.

**United States of America**

**PROPOSALS FOR THE WORK OF THE CONFERENCE**

(Part 2 of 2)

# Proposal for Agenda Item 1.7

## (Review of the use of the HF bands by the aeronautical mobile (R) and maritime mobile services with a view to protecting operational, distress and safety communications, taking into account Resolution 346 (WRC-97))

**Background Information:** WP8B and the CPM have identified two issues
comprising this agenda item;

1)  HF bands allocated for the distress and safety communications of the
    maritime and aeronautical mobile (R) services have been subjected to
    an increase in harmful interference caused by unauthorized use. It
    is essential for the safety-of-life and property that these distress
    and safety channels are kept free from unauthorized use and harmful
    interference.

2)  Several maritime HF distress and safety frequencies are also used
    for international routine calling. The routine calling causes
    interference to distress and safety communications.

\[This proposal only addresses maritime issues related to items 1 and 2
above. Another proposal was developed regarding aeronautical issues.)

MARITIME ISSUES

The protection of maritime HF distress and safety frequencies, in
particular the frequencies 12 290 kHz and 16 420 kHz, is addressed in
Resolution **346 (WRC-97)**. A significant source of interference to
distress traffic on these frequencies is due to their use as calling
frequencies. Resolution **346** calls for administrations to minimize
the use of these frequencies for non-safety calling purposes by coast
and ship stations.

GMDSS distress and safety frequencies are also used for calling in some
of the maritime HF bands. In each maritime HF band one channel is
designated as an international calling channel for radiotelephony. In
the 4, 6, 12 and 16 MHz bands, the distress and safety frequency is the
same as the ships transmitting frequency on the calling channel.

The radio telephony calling channels are used on duplex basis, whilst
the distress and safety frequencies are used on simplex. When a ship is
calling a coast station, it transmits on the distress frequency. The
problem is that at times that the ship has difficulty monitoring whether
or not there is ongoing distress traffic, because its receiver is on the
corresponding coast station frequency. This problems occurs in the 4, 6,
12 and 16 MHz bands and not in the 8, 18, 22 and 25 MHz bands. The
problem is being caused by the transmitting station not adhering to
existing regulatory standards which require a station to listen on its
transmitting frequency prior to transmitting.

Once initial contact has been established and working frequencies
coordinated, traffic handling is accomplished directly on the
coordinated working frequencies.

Compliance with existing Radio Regulations, **S52.224** which requires
that a station listens before transmitting would alleviate this problem.
Further regulations are not required, rather enforcement of the existing
regulation.

WP8B considered the modification of Article **S52** and Appendices
**S13** and **S17** to exclude routine calling from the HF distress and
safety frequencies as a method to satisfy the agenda item. This method
may require modification of existing equipment.

The U.S. proposes no change to divide the existing distress and calling
channels in two separate frequencies, one exclusive distress and safety
frequency and one international radiotelephony calling frequency. The
distress frequencies should remain the same as they are at present where
calling is allowed and no modifications to the distress procedures are
required. Strict compliance and enforcement of existing Radio
Regulations, **S52.224,** which requires that a station listen before it
transmits would alleviate this problem.

This proposal contains the minimum modifications required in the Radio
Regulations and its appendices in order to improve the situation on the
HF radiotelephony distress and safety frequencies.

WP8B further encouraged the use of digital selective calling instead of
calling by radiotelephony, while recognizing that all vessels may not be
fitted with DSC.

This proposal is also encouraging ships and coast stations to use
digital selective calling. If voice calling is required, it should in
the first instance be done on the coast station working channel and
secondarily on the appropriate calling frequency.

**Proposal:**

ARTICLE S52

**Special rules relating to the use of frequencies**

**S52.216** *C. Bands Between 4 000 kHz and 27 500 kHz*

C1. Mode of Operation of Stations

> **S52.219** 3) Coast stations employing class J3E or J2D emissions in
> accordance with No. **S52.217** in the bands between 4 000 and 27 500
> kHz shall use the minimum power necessary to cover their service area
> and shall at no time use a peak envelope power in excess of 10 kW per
> channel. [On the radiotelephony calling frequencies 4 417 kHz and 6
> 516 kHz coast stations shall limit their peak envelope power to the
> lowest value to maintain reliable communications, not to exceed 5
> kW.]{.underline}
>
> **Reasons:** Due to geographical differences, the higher power of 5 kW
> is required to provide adequate communications coverage.

**S52.220** 4) Ship stations employing class J3E or J2D emissions in
accordance with No. **S52.217** in the bands between 4 000 kHz and
27 500 kHz shall at no time use a peak envelope power in excess of 1.5
kW per channel.

Reasons: Higher shipboard power increases the potential for interference
and out of band emissions.

> [**S52.220A** Administrations should encourage the coast stations and
> ships under their jurisdiction to utilize the digital selective
> calling techniques for call and reply.]{.underline}
>
> **Reasons:** Decreases the potential for interference on the distress
> channels.
>
> [**S52.220B** When calling by radiotelephony is necessary, it should
> be done (in order of preference):]{.underline}
>
> **Reasons:** Decreases the potential for interference on the distress
> channels
>
> [**S52.220C** (1) On the working frequencies assigned to the coast
> station in question or]{.underline}
>
> **Reasons:** Decreases the potential for interference on the distress
> channels
>
> [**S52.220D** (2) when this is not possible, on the international
> calling frequencies listed under **S52.221**.]{.underline}
>
> **Reasons:** Decreases the potential for interference on the distress
> channels
>
> C2. Call and Reply
>
> **S52.221** § 97. (1) Ship stations may use the following carrier
> frequencies for calling in radiotelephony:
>
> 4 125 kHz ^3,\ 4,\ 5^
>
> 6 125 kHz^4,\ 5^
>
> 8 255 kHz
>
> 12 290 kHz^5^\
> 16 420 kHz^5^\
> 18 795 kHz\
> 22 060 kHz
>
> 25 097 kHz
>
> **Reasons:** It is not necessary to convert calling frequencies from
> duplex to simplex.
>
> ^3^ **S52.221.1** In the United States, the carrier frequency 4 125
> kHz is also authorized for common use by coast and ship stations for
> single-sideband radiotelephony on a simplex basis, provided the peak
> envelope power of such stations does not exceed 1 kW (see also No.
> **S5.222.2**).
>
> **Reasons:** This note supports existing U.S. use of this channel in
> remote areas of our Search and Rescue areas of responsibility and
> supports communications in remote areas.
>
> ^4^ **S52.221.2** The carrier frequencies 4 125 kHz and 6 215 kHz are
> also authorized for common use by coast and ship stations for
> single-sideband radiotelephony on a simplex basis for call and reply
> purposes, provided that the peak envelope power of such stations does
> not exceed 1 kW. The use of these frequencies for working purposes is
> not permitted (see also Appendix **S13** and No. **S52.221.1**).
>
> **Reasons:** This note supports existing U.S. use of this channel in
> remote areas of Search and Rescue responsibility and supports
> communications in remote areas.
>
> **^5^ S52.221.3** The carrier frequencies 4 125 kHz, 6 215 kHz, 8 291
> kHz, 12 290 kHz and 16 420 kHz are also authorized for common use by
> coast and ship stations for single-sideband radiotelephony on a
> simplex basis for distress and safety traffic.
>
> **Reasons:** This note supports existing uses and enhances maritime
> safety in remote geographical areas.
>
> **S52.222** (2) Coast stations may use the following carrier
> frequencies for calling in radiotelephony6:
>
> 4 417 kHz^7^\
> 6 516 kHz^7^\
> 8 779 kHz\
> 13 137 kHz\
> 17 302 kHz\
> 19 770 kHz\
> 22 756 kHz\
> 26 172 kHz

Reasons: Conversion to simplex operation is not necessary.

**^6^ S52.222.1** These frequencies may also be used by coast stations
with class H2B emission, when using the selective calling system defined
in Recommendation ITU-R M.257-3.

Reasons: The use of Digital Selective Calling techniques is encouraged.

> ^7^ **S52.222.2** The carrier frequencies 4 417 kHz and 6 516 kHz are
> also authorized for common use by coast and ship stations for
> single-sideband radiotelephony on a simplex basis, provided that the
> peak envelope power of such stations ~~does not exceed 1 kW~~ [shall
> be limited to the lowest value to maintain reliable communications,
> not to exceed 5 kW]{.underline}. The use of 6 516 kHz for this purpose
> should be limited to daytime operation (see also No. **S52.221.1**).
>
> **Reasons:** Consequential to **MOD S52.219**.
>
> **S52.224** § 99. 1) Before transmitting on the carrier frequencies
> 4 125 kHz, 6 215 kHz, 8 291 kHz, 12 290 kHz or 16 420 kHz a station
> shall listen on the frequency for a reasonable period to make sure
> that no distress traffic is being sent (see Recommendation ITU-R
> M.1171).
>
> **Reasons:** Conversion to simplex operation is not necessary.
>
> **S52.227** 2) The frequencies to be used for the conduct of simplex
> radiotelephony are shown in Appendix **S17**,
> [Sub-]{.underline}Section B. In these cases, the peak envelope power
> of the coast station transmitter shall not exceed 1 kW.
>
> **Reasons:** Editorial.

APPENDIX S17

Frequencies and channelling arrangements in the\
high‑frequency bands for the maritime mobile service

(See Article **S52**)

> PART A -- Table of subdivided bands
>
> **PART B** -- **Channelling arrangements**
>
> **Section I -- Radiotelephony**
>
> 5\. The following frequencies in Sub-Section A are allocated for
> calling purposes:

-- (Channel No.   421 in the   4 MHz band);

-- (Channel No.   606 in the   6 MHz band);

-- (Channel No.   821 in the   8 MHz band);

-- (Channel No. 1221 in the 12 MHz band);

-- (Channel No. 1621 in the 16 MHz band);

-- (Channel No. 1806 in the 18 MHz band);

-- (Channel No. 2221 in the 22 MHz band);

-- (Channel No. 2510 in the 25 MHz band).

> The remaining frequencies in Sub-Sections A, B, C-1 and C-2 are
> working frequencies.

**Reasons:** Conversion to simplex operation is not necessary.

5A For the use of the carrier frequencies:

4 125 kHz (Channel No. 421)

> 6 215 kHz (Channel No. 606)
>
> 8 291 kHz (Channel No. 833)
>
> 12 290 kHz (Channel No. 1221)
>
> 16 420 kHz (Channel No. 1621)

In Sub-Section A, by coast and ship stations for distress and safety
purposes, see Article **S31** and Appendix **S13**.

Reasons: Conversion to simplex operation is not necessary.

**SUB-SECTION A**

Table of single-sideband transmitting frequencies (kHz) for duplex\
(two-frequency) operation

**Reasons:** Conversion to simplex operation is not necessary.

\_\_\_\_\_\_\_\_\_\_

**United States of America**

**(Draft) Proposal for the Work of the Conference**

# Proposals for Agenda Item 1.15.1

## to consider new allocations to the radionavigation- satellite service in the range from 1 to 6 GHz required to support developments;

**Background Information:** Additional Radionavigation-Satellite Service
(RNSS) signals will greatly enhance the accuracy, reliability and
robustness of the civil Global Positioning System (GPS) by enabling more
effective corrections to be made for the time delay effects of the
ionosphere on the signals from space. The International Civil Aviation
Organization (ICAO) has stated the requirement for an additional civil
signal on GPS to support Global Navigation Satellite System (GNSS)
requirements and for space-based augmentation systems. A requirement for
aeronautical users is having the protected signal operate within radio
spectrum allocated to the Aeronautical Radionavigation Service (ARNS),
which would also include the possibility of terrestrial augmentation
systems.

The United States has identified a third signal at 1 176.45 MHz to
support GNSS developments. The third signal is proposed to be an
international civil aviation safety-of-life service signal with a
required bandwidth 24 MHz. Technical studies show compatibility between
existing operational ARNS systems and the proposed new signal at
1 176.45 MHz. The power levels and signal structure will allow the
operation of a relatively large number of co-frequency satellite and
terrestrial stations to be in view of an RNSS receiver.

**Proposal:**

**Section IV -- Table of Frequency Allocations**

960-1 215 MHz

+-----------------------+-----------------------+----------------------+
| Allocation to         |                       |                      |
| services              |                       |                      |
+-----------------------+-----------------------+----------------------+
| Region 1              | Region 2              | Region 3             |
+-----------------------+-----------------------+----------------------+
| **960-1 215**         |                       |                      |
| AERONAUTICAL          |                       |                      |
| RADIONAVIGATION       |                       |                      |
|                       |                       |                      |
| **MOD** S5.328        |                       |                      |
+-----------------------+-----------------------+----------------------+

> **S5.328** The band 960 - 1 215 MHz is reserved on a worldwide basis
> for the use and development of airborne electronic aids to air
> navigation and any directly associated ground-based [and
> satellite-borne]{.underline} facilities. [In the 1 164 --1 188 MHz
> portion of this band, the radionavigation-satellite service
> (space-to-Earth) is also allocated worldwide on a primary basis. In
> this band stations of the radionavigation-satellite services, but not
> in the aeronautical radionavigation-satellite service, shall not cause
> harmful interference to, or claim protection from, stations of the
> aeronautical radionavigation and aeronautical
> radionavigation-satellite services.]{.underline}
>
> **Reasons:** Additional Radionavigation-Satellite Service (RNSS)
> signals will greatly enhance the accuracy, reliability and robustness
> of the civil Global Navigation Satellite System (GNSS) by enabling
> more effective corrections to be made for the time delay effects of
> the ionosphere on the signals from space.

**United States of America**

**(Draft) Proposals for the Work of the Conference**

# Proposals for Agenda Item 1.18

## (To consider the use of new digital technology for the maritime mobile service in the band 156-174 MHz and consequential revision of Appendix S18, taking into account Resolution 342 (WRC-97)

Background Information: Appendix S18 of the ITU Radio Regulations
defines the channels of the maritime mobile service. These channels
support a variety of functions including "Distress, Safety and Calling:
public correspondence, inter-ship, ship/shore/ship, port operations and
ship movement. The maritime mobile frequency band, 156-174 MHz,
(effectively 156-162 MHz in the U.S. due to previous domestic regulatory
actions), supports maritime communications worldwide.

WP8B and the CPM studied this agenda item and determined that the status
of the ITU-R studies indicate that revisions of Appendix **S18** to
introduce new digital technologies is not possible at this conference.

With the rapidly increasing use of the VHF maritime mobile band,
particularly for data communications, increased congestion and mutual
interference is being experienced which, among others, has resulted in
unacceptable degradation of the distress and safety related function for
which this band is utilized. Unless action is taken this situation will
only worsen as usage continue to grow.

The United States proposes to modify Resolution **342** to allow
consideration of one or more new interoperable technology, digital or
otherwise, for the maritime mobile service. The U.S. also proposes the
ITU-R studies take into account the existing Appendix **S18** channeling
plan in order to minimize disruption of and provide for interoperability
with current systems.

**Proposal:**

RESOLUTION 342 (WRC-~~97~~[2000]{.underline})

Review of new technology to provide improved efficiency in the use of
the band 156-174 MHz by stations in the maritime mobile service

The World Radiocommunication Conference (~~Geneva, 1997~~[Istanbul,
2000]{.underline}),

> considering

*a)* that the agenda of this conference includes the consideration of
the use of Appendix **S18** to the Radio Regulations in respect of
maritime mobile communications and the use of new technology for
maritime radiotelephony channels;

*b)* Recommendation **318** **(Mob-87)**;

*c)* that Appendix **S18** identifies frequencies to be used for
distress and safety communications on an international basis;

*d)* that the introduction of new technology in the maritime mobile
service shall not disrupt distress and safety communications in the VHF
band including those established by the International Convention for the
Safety of Life at Sea (SOLAS), 1974, as amended;

*e)* that ITU-R is conducting studies on improving efficiency in the use
of this band, and that these studies are still ongoing;

*f)* that changes made in Appendix **S18** should not prejudice the
future use of these frequencies or the capabilities of systems or new
applications required for use by the maritime mobile service;

*g)* that the congestion on Appendix **S18** frequencies calls for the
implementation of efficient new technologies;

*h)* that the use of new technology on maritime VHF frequencies will
make it possible to better respond to the emerging demand for new
services,

noting

*a)* that some administrations are considering adopting some of the
above changes to their operations within the Appendix **S18**
frequencies~~,~~[;]{.underline}

[*b)* that digital systems have been successfully implemented in a
portion of the land mobile service,]{.underline}

[*c)* that the use of mobile telephones along the coast had led to the
reduced use of maritime public correspondence systems,]{.underline}

resolves

*a)* that a new technology, digital or otherwise should be used by the
maritime mobile service in the channels identified in Appendix S18;

[*b)* that there should be one or more than one interoperable worldwide
technology or systems implemented in Appendix **S18**, in order to
provide full world-wide interoperability of equipment;]{.underline}

[*c)* that the ITU-R continue urgent studies on a new technology, taking
into account the current channelling arrangements of Appendix **S18** in
order to minimize the disruption of and provide for interoperability
with current systems;]{.underline}

b)  that ~~WRC-99~~ [a future WRC]{.underline} should consider the use
    of new technology in the band 156-174 MHz and consequential revision
    of Appendix **S18** [if necessary]{.underline},

> invites ITU-R

to continue studies on the following with a view to providing a report
to ~~WRC‑99~~ [a future WRC]{.underline}:

*a)* to identify the future requirements of the maritime mobile service;

*b)* to identify suitable technical characteristics of the system or
interoperable systems to replace existing technology;

*c)* to identify necessary modifications [if required,]{.underline} to
the frequency plan contained within Appendix **S18**;

*d)* to recommend a timetable for the introduction of new technology and
the necessary changes;

*e)* to study and recommend how new technology can be introduced without
harming the distress and safety requirements,

> instructs the Secretary-General

to communicate this Resolution to the International Maritime
Organization.

**Reasons:** These modifications do not restrict the new technology to
digital or to one technology, all available technologies should be
studied, as new technologies are constantly emerging. It is spectrally
inefficient to set aside spectrum, which is already extremely congested,
for a new technology that has not yet been determined. It is possible to
have more than one standard or system that is interoperable.
Technologies using the existing channel spacing of 25 kHz, 12.5 kHz, as
opposed to5 kHz spacing, should be studied so as to avoid the
replacement of every existing VHF marine band radio.

[^1]: ^\*^ The proposals advanced in this paper do not represent the
    full extent of U.S. proposals to WRC-2000 on Agenda Item 1.4.

[^2]: \*The proposal advanced in this paper may not represent the full
    extent of U.S. proposals to WRC-00 on Agenda Item 1.4.

[^3]: ^\*^ The date of provisional application of this allocation shall
    be in conformity with Resolution **126 (WRC-97)**.