COMDTINST 16575.1A — Processing Of Global Positioning System (gps) Interference Test Requests

COMDTINST 16575.1A governs Coast Guard processing of Department of Defense-sponsored GPS interference test requests.

Search COMDTINST 16575.1A

  • Publication number: COMDTINST 16575.1A
  • Title: PROCESSING OF GLOBAL POSITIONING SYSTEM (GPS) INTERFERENCE TEST REQUESTS
  • Date: 2/28/2017
  • Proponent: CG-5P

View COMDTINST 16575.1A on armypubs.army.mil


It provides guidance, responsibilities, and authority for processing DOD-sponsored GPS interference tests within the Coast Guard. It addresses maritime impact reviews, NAVCEN analysis, District responses, approval decisions, and procedures for halting tests.

Applies to: It is intended to provide operational guidance for Coast Guard personnel and is not intended to nor does it impose legally-binding requirements on any party outside the Coast Guard.

Topics covered

  • GPS interference test requests
  • GPS frequency band testing
  • Maritime safety impact reviews
  • GPS Interference Test Approval process
  • NAVCEN test analysis
  • DGPS broadcast sites
  • Cease Buzzer procedures
  • Environmental impact considerations

Questions and answers

Who must ensure compliance with COMDTINST 16575.1A?

Area and District Commanders and Commanding Officer of Coast Guard Navigation Center (NAVCEN) must ensure compliance with the provisions of this Instruction. (paragraph 2)

What must each District designate for GPS interference testing reviews?

Each District must designate a point of contact for maritime safety and other GPS interference testing impact review. (paragraph 7)

How quickly must Districts respond to NAVCEN about GPS interference testing impacts?

Districts must respond to NAVCEN preferably within 5 days of, but no later than the suspense date. (paragraph 7)

What does NAVCEN analyze for GPS interference testing?

NAVCEN is responsible for analyzing the information to determine the impact of interference/testing on the U.S. Coast Guard’s DGPS broadcast sites, navigable waterways and maritime/civil users.

Is additional training required for this GPS interference testing task?

No new or additional training is required. (paragraph 7)

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