GMDSS. FCC Test 57 – Online Maritime Tests

Which of the following statements concerning SITOR communications is true?

Weather broadcasts are always made in ARQ mode to ensure reception.
FEC mode broadcasts can be received without the transmitter being turned on.
FEC requests are first acknowledged by the vessel's transmitter before broadcasts can be received.
None of these.

FEC Sitor transmissions might be used to?

Why must the GMDSS operator be able to set-up FEC & ARQ modes and differentiate between them?

The ARQ telex mode must be selected for follow-on telex communications in a distress situation and the FEC telex mode selected for reception of HF MSI.
Both a
The proper mode must be selected for reception of HF MSI.
The proper mode must be selected for follow-on telex communications in a distress situation.

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

Select one of the 6 HF MSI frequencies and set-up the transceiver in ARQ telex mode.
Select the MF MSI frequency dedicated to tropical MSI and set-up the transceiver in FEC telex mode.
Select one of the 8 HF MSI frequencies and set-up the transceiver in FEC telex mode.
Select one of the 6 MF MSI frequencies and set-up the transceiver in FEC telex mode.

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

FEC NBDP transmissions are normally used to?

If the vessel is within range of NAVTEX broadcasts and both the Inmarsat-C and the NAVTEX receiver are inoperative the GMDSS operator should:

The sequence ARQ, FEC, SFEC best corresponds to which of the following sequences?

Two way communications, One way communications to a single station, One way communications to all stations.
One-way communications to all stations, two-way communications, one-way communications to a single station.
Two way communications, one-way communications to all stations, one-way communications to a single station.
One-way communications to a single station, one-way communications to all stations, two-way communications.

Selective FEC communications (SFEC) are employed when:

Multiple stations must receive communications by using their transmitters to achieve phasing.
An individual station must receive communications by using their transmitter to achieve phasing and block other stations from breaking in.
Multiple stations without a group selcall must receive communications without using their transmitters (Radio Silence).
An individual station must receive communications without using any transmitters (Radio Silence).

The sequence BFEC, SFEC, ARQ best corresponds to which of the following sequences?

One-way communications to all stations, two way communications, one-way communications to a single station.
One-way communications to a single station, one-way communications to all stations, two-way communications.
None of the above.
Two way communications, one-way communications to all stations, two-way communications.

Review Answers