53962 Federal Register / Vol. 77, No. 171 / Tuesday, September 4, 2012 / Notices 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

Technical Standard Order (TSO)–C65a, 

Airborne Doppler Radar Ground Speed 

and/or Drift Angle Measuring 

Equipment (For Air Carrier Aircraft) 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of cancellation of 

Technical Standard Order (TSO)–C65a, 

Airborne Doppler Radar Ground Speed 

and/or Drift Angle Measuring 

Equipment (For Air Carrier Aircraft). 

SUMMARY: This notice announces the 

FAA’s cancellation of TSO–C65a. The 

effect of the cancelled TSO will result 

in no new TSO–C65a design or 

production approvals. However, 

cancellation will not affect current 

production of articles with an existing 

TSO authorization (TSOA). Articles 

produced under an existing TSOA can 

still be installed per the existing 

airworthiness approvals. 

FOR FURTHER INFORMATION CONTACT: Mr. 

Albert Sayadian, AIR–130, Federal 

Aviation Administration, 470 L’Enfant 

Plaza, Suite 4102, Washington, DC 

20024. Telephone (202) 385–4652, fax 

(202) 385–4651, email to: albert.

sayadian@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The Doppler radar ground speed and/ 

or drift angle measuring equipment 

described by this TSO was used to 

provide inputs to semiautomatic selfcontained dead reckoning navigation 

systems which were not continuously 

dependent on information derived from 

ground based or external navigation 

aids. The system employed radar signals 

to detect and measure ground speed and 

drift angle, using the aircraft compass 

system as its directional reference. This 

approach is less accurate than Inertial 

Navigation Systems (INS), and the use 

of an external reference is required for 

periodic updates if acceptable position 

accuracy is to be achieved on long range 

flights. Use of INS and Global 

Positioning System (GPS) has rendered 

TSO–C65a Doppler sensor equipment 

that provides inputs to dead reckoning 

navigation systems obsolete. 

On August 18, 1983, the FAA 

published TSO–C65a. The FAA has no 

record of any TSO–C65a applications 

dating back to 1990. Our research 

indicates there are no new TSO–C65a 

applications in progress, and there are 

no authorized manufacturers 

manufacturing, advertising, or selling 

TSO–C65a compliant equipment. Given 

the obsolescence of the equipment, and 

the lack of industry interest in new 

TSO–C65a product design, the FAA is 

cancelling TSO–C65a. 

Comments 

Request for comments of our 

proposed cancellation of TSO–C65a as 

published in 77 FR 37470, June 21, 

2012, produced no comments. 

Conclusion 

TSO–C65a is cancelled effective 

February 1, 2013. 

Issued in Washington, DC, on August 28, 

2012. 

Susan J.M. Cabler, 

Assistant Manager, Aircraft Engineering 

Division, Aircraft Certification Service. 

[FR Doc. 2012–21632 Filed 8–31–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

Technical Standard Order (TSO)–C68a, 

Airborne Automatic Dead Reckoning 

Computer Equipment Utilizing Aircraft 

Heading and Doppler Ground Speed 

and Drift Angle Data (for Air Carrier 

Aircraft) 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of cancellation of 

Technical Standard Order (TSO)–C68a, 

Airborne Automatic Dead Reckoning 

Computer Equipment Utilizing Aircraft 

Heading and Doppler Ground Speed 

and Drift Angle Data (for Air Carrier 

Aircraft). 

SUMMARY: This notice announces the 

FAA’s cancellation of TSO–C68a. The 

effect of the cancelled TSO–C68a will 

result in no new TSO–C68a design or 

production approvals. 

FOR FURTHER INFORMATION CONTACT: Mr. 

Albert Sayadian, AIR–130, Federal 

Aviation Administration, 470 L’Enfant 

Plaza, Suite 4102, Washington, DC 

20024. Telephone (202) 385–4652, fax 

(202) 385–4651, email to: 

albert.sayadian@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

Doppler radar is a semiautomatic selfcontained dead reckoning navigation 

system (radar sensor plus computer) 

which is not continuously dependent on 

information derived from ground based 

or external aids. The system employs 

radar signals to detect and measure 

ground speed and drift angle, using the 

aircraft compass system as its 

directional reference. Doppler is less 

accurate than Inertial Navigation System 

(INS), and the use of an external 

reference is required for periodic 

updates if acceptable position accuracy 

is to be achieved on long range flights. 

Use of INS and Global Positioning 

System (GPS) has rendered TSO–C68a 

systems obsolete. The FAA has no 

record of any applications for TSO– 

C68a since it was published in 1983. 

Given the obsolescence of the 

equipment, and the lack of industry 

interest in TSO–C68a product designs, 

the FAA is cancelling TSO–C68a. 

Comments 

Request for comments of our 

proposed cancellation of TSO–C68a as 

published in 77 FR 37733, June 22, 

2012, produced no comments. 

Conclusion 

TSO–C68a is cancelled effective 

February 1, 2013. 

Issued in Washington, DC, on August 28, 

2012. 

Susan J. M. Cabler, 

Assistant Manager, Aircraft Engineering 

Division, Aircraft Certification Service. 

[FR Doc. 2012–21633 Filed 8–31–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Maritime Administration 

Reports, Forms and Recordkeeping 

Requirements; Agency Information 

Collection Activity Under OMB Review 

AGENCY: Maritime Administration, DOT. 

ACTION: Notice and request for 

comments. 

SUMMARY: In compliance with the 

Paperwork Reduction Act of 1995 (44 

U.S.C. 3501 et seq.), this notice 

announces that the Information 

Collection abstracted below has been 

forwarded to the Office of Management 

and Budget (OMB) for review and 

approval. The nature of the information 

collection is described as well as its 

expected burden. The Federal Register 

Notice with a 60-day comment period 

soliciting comments on the following 

collection of information was published 

on June 8, 2012, and comments were 

due by August 7, 2012. No comments 

were received. 

DATES: Comments should be submitted 

on or before October 4, 2012. 

FOR FURTHER INFORMATION CONTACT: 

Dennis Brennan, Maritime 

Administration, 1200 New Jersey 

Avenue SE, Washington, DC 20590. 

Telephone: 202–366–1029; or email: 

dennis.brennan@dot.gov. Copies of this 


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