1-C-15: MF-HF Equipment Controls
1-15C1:
Which modes could be selected to receive vessel traffic lists from high seas shore stations?
SSB and FEC.
AM and VHF-FM.
ARQ and FEC.
VHF-FM and SSB.
1-15C2:
Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?
Answers a) and c) are both correct.
For non-GMDSS ships, to maximize the chances for other vessels to receive those communications.
For GMDSS or DSC-equipped ships, to maximize the chances for other vessels to receive those communications following the transmission of a DSC call of the correct priority.
To enable an RCC or Coast station to only hear communications from the vessel actually in distress.
1-15C3:
To set-up the MF/HF transceiver for a voice call to a coast station, the operator must:
Select J3E mode for proper voice operations.
Select J3E mode for proper SITOR operations.
Select F1B mode or J2B mode, depending on the equipment manufacturer.
Select F1B/J2B modes or J3E mode, depending on whether FEC or ARQ is preferred.
1-15C4:
MF/HF transceiver power levels should be set:
To the lowest level necessary for effective communications.
To the level necessary to maximize the propagation radius.
To the highest level possible so as to ensure other stations cannot “break-in” on the channel during use.
Both a) and c) are correct.
1-15C5:
To set-up the MF/HF transceiver for a TELEX call to a coast station, the operator must:
Select F1B mode or J2B mode, depending on the equipment manufacturer.
Select J3E mode for proper SITOR operations.
Select F1B/J2B modes or J3E mode, depending on whether ARQ or FEC is preferred.
None of the above.
1-15C6:
What is the purpose of the Receiver Incremental Tuning (RIT) or “Clarifier” control?
It acts as a “fine-tune” control on the receive frequency.
It acts as a “fine-tune” control on the transmitted frequency.
It acts as a “fine-tune” control on both the receive and transmitted frequencies.
None of the above.
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