USCG Marine Communications and GMDSS

Question 1

What is the international distress, safety, and calling frequency on VHF radio?

Accepted Answer

Channel 16

Answer

VHF Channel 16 (156.8 MHz) is the international distress, safety, and calling frequency required to be monitored by all vessels at sea.

Question 2

What does GMDSS stand for?

Accepted Answer

Global Maritime Distress and Safety System

Answer

GMDSS stands for Global Maritime Distress and Safety System, the international radio communications framework for maritime safety established under SOLAS.

Question 3

Which EPIRB type is float-free, automatically activated, and transmits on 406 MHz via satellite?

Accepted Answer

Category I 406 MHz EPIRB

Answer

Category I 406 MHz EPIRBs are float-free, automatically activate when submerged, and use the COSPAS-SARSAT satellite system to transmit distress signals.

Question 4

Which VHF channel is designated exclusively for Digital Selective Calling (DSC) distress alerts?

Accepted Answer

Channel 70

Answer

VHF Channel 70 is reserved exclusively for Digital Selective Calling (DSC) and must not be used for voice communications.

Question 5

What is the primary purpose of a NAVTEX receiver aboard a vessel?

Accepted Answer

Receiving navigational warnings, weather forecasts, and urgent maritime safety information

Answer

NAVTEX is an international automated direct-printing service that receives navigational warnings, meteorological forecasts, and urgent maritime safety information on MF frequencies.

USCG - United States Coast Guard Practice Test

USCG - United States Coast Guard Practice Test

USCG Marine Communications and GMDSS