FREE GMDSS Navigation and Communication Questions and Answers

Question 1

Equipment for radiotelephony use in survival craft stations under GMDSS must have what characteristic(s)?

Accepted Answer

All of these

Answer

Operation on Ch-16

Answer

Permanently-affixed antenna

Answer

Watertight

Question 2

How are paired NBDP frequencies normally used?

Accepted Answer

These are normally used for ARQ communications with coast radio stations.

Answer

These are normally used only for distress communications to limit channel interference.

Answer

These are normally used for FEC communications with coast radio stations.

Answer

These are normally used for DSC communications with coast radio stations.

Question 3

To set up the MF/HF Transceiver for a voice call to a coast station, the operator must:

Accepted Answer

Select J3E mode for proper voice operations.

Answer

Select J3E mode for proper Sitor operations.

Answer

Select F1B mode or J2B mode, depending on the equipment manufacturer.

Answer

Select F1B/J2B modes or J3E mode, depending on whether FEC or ARQ is preferred.

Question 4

Which statement is NOT true regarding the COSPAS-SARSAT system?

Accepted Answer

May be used to transmit public correspondence.

Answer

Doppler shift is used to locate the beacons.

Answer

EPIRBs are used as satellite beacons aboard lifeboats as alerting devices.

Answer

Locates distress beacons transmitting on 406 MHz.

Question 5

Equipment for radiotelephony use in survival craft stations under GMDSS must have what capability?

Accepted Answer

Operation on Ch-16

Answer

Operation on 457.525 MHz

Answer

Operation on 121.5 MHz

Answer

Any one of these

Question 6

If the vessel is experiencing atmospheric interference with NAVTEX broadcasts, especially in the tropics, the GMDSS operator should:

Accepted Answer

Select one of the 8 HF MSI frequencies and set up the transceiver in FEC telex mode.

Answer

Select one of the 6 HF MSI frequencies and set up the transceiver in ARQ telex mode.

Answer

Select the MF MSI frequency dedicated to tropical MSI and set up the transceiver in FEC telex mode.

Answer

Select one of the 6 MF MSI frequencies and set up the transceiver in FEC telex mode.

Question 7

If the vessel is beyond the range of NAVTEX broadcasts and the Sat-C system fails, the GMDSS operator must:

Accepted Answer

Select an HF MSI frequency and FEC telex mode to receive MSI.

Answer

Select 518 kHz ARQ telex on the MF/HF console to receive MSI.

Answer

Request repairs of the Sat-C system and wait until within range of NAVTEX.

Answer

Select 518 kHz FEC telex on the MF/HF console to receive MSI.

Question 8

FEC NBDP transmissions are normally used to?

Accepted Answer

Receive HF MSI and NAVTEX.

Answer

Receive Coast station traffic lists, NAVTEX, and VHF MSI broadcasts.

Answer

Receive weather messages, Coast Station traffic lists, and company messages.

Answer

None of the above.

Question 9

Selective FEC communications (SFEC) are employed when:

Accepted Answer

An individual station must receive communications without using any transmitters (Radio Silence).

Answer

An individual station must receive communications by using its transmitter to achieve phasing and block other stations from breaking in.

Answer

Multiple stations without a group selcall must receive communications without using their transmitters (Radio Silence).

Answer

Multiple stations must receive communications by using their transmitters to achieve phasing.

Question 10

Which is the key part of the search and rescue system under GMDSS?

Accepted Answer

COSPAS/SARSAT satellites

Answer

NASA satellites

Answer

AMSAT satellites

Answer

US Space Agency satellites