USCG Marine Communications and GMDSS 2

Question 1

Which GMDSS Sea Area is defined as within VHF shore-based DSC coverage, typically within 20-30 miles of shore?

Accepted Answer

Sea Area A1

Answer

Sea Area A1 is defined as the area within range of VHF shore-based DSC stations, generally within 20-30 nautical miles of the coast.

Question 2

What is the function of a SART (Search and Rescue Transponder)?

Accepted Answer

Locating survival craft by responding to X-band radar pulses

Answer

A SART responds to X-band (9 GHz) radar pulses from searching vessels or aircraft, displaying a series of dots on the radar screen to pinpoint the location of survivors.

Question 3

What is the primary purpose of two-way VHF portable radios required in survival craft under GMDSS?

Accepted Answer

On-scene communications between survivors and rescue units

Answer

Two-way VHF portable radios in survival craft are used for on-scene communications between survivors and SAR rescue units during rescue operations.

Question 4

What does the COSPAS-SARSAT system primarily do?

Accepted Answer

Detects and locates 406 MHz emergency beacons including EPIRBs and PLBs

Answer

COSPAS-SARSAT is an international satellite-based search and rescue system that detects and locates distress signals from 406 MHz emergency beacons.

Question 5

Which frequency band does NAVTEX use for international maritime safety broadcasts?

Accepted Answer

MF (518 kHz and 490 kHz)

Answer

NAVTEX operates on medium frequency, primarily 518 kHz for international broadcasts in English and 490 kHz for national language broadcasts.

USCG - United States Coast Guard Practice Test

USCG - United States Coast Guard Practice Test

USCG Marine Communications and GMDSS 2