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 A2

Answer

Sea Area A3

Answer

Sea Area A4

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

Sending distress calls via satellite

Answer

Communicating voice messages to rescuers

Answer

Automatically activating the vessel's AIS system

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

Contacting commercial shipping for navigation updates

Answer

Transmitting vessel position to satellites

Answer

Broadcasting weather information to the crew

Question 4

What does the COSPAS-SARSAT system primarily do?

Accepted Answer

Detects and locates 406 MHz emergency beacons including EPIRBs and PLBs

Answer

Provides GPS navigation for commercial vessels

Answer

Monitors vessel traffic in coastal waters

Answer

Controls VHF radio frequency assignments in ports

Question 5

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

Accepted Answer

MF (518 kHz and 490 kHz)

Answer

VHF (156-174 MHz)

Answer

HF (4-27.5 MHz)

Answer

UHF (300-3000 MHz)

Question 6

What vessel identifier is automatically transmitted when a DSC distress alert is sent?

Accepted Answer

The vessel's MMSI number

Answer

The vessel's call sign

Answer

The vessel's IMO number

Answer

The master's license number

Question 7

What is the watch-keeping requirement for VHF Channel 16 on GMDSS-equipped vessels while at sea?

Accepted Answer

Continuous watch while at sea

Answer

Only when in port

Answer

Only during daylight hours

Answer

At scheduled 4-hour intervals