GMDSS Element 1 UPDATED Exam
Questions and CORRECT Answers
What is the purpose of the INT-USA control settings on a VHF? - CORRECT ANSWER -
to change certain International Duplexes channel assignments to simplex in the US for VTS and
other purposes
VHF ship station transmitters must have the capability of reducing carrier power to - CORRECT
ANSWER - 1 watt
The Dual Watch function is used to - CORRECT ANSWER - listen on any selected
channel while periodically monitoring Ch-16
Which of the following statements best describes the correct setting for manual adjustment of the
squelch control? - CORRECT ANSWER - adjust squelch control to the minimum level
necessary to barely suppress any background noise
The Scan function is used to - CORRECT ANSWER - sequentially scan all or selected
channels
Why must all VHF Distress, Urgency and Safety communications (as well as VTS traffic calls)
be performed in Simplex operating mode? - CORRECT ANSWER - to ensure that vessels
not directly participating in the communications can hear both sides of the radio exchange
What channel must VHF-FM-equipped vessels monitor at all times when the vessel is at sea? -
CORRECT ANSWER - Channel 16
What is the aircraft frequency and emission used for distress communications? - CORRECT
ANSWER - 121.500 MHz-A3E
Which VHF channel is used only for digital selective calling? - CORRECT ANSWER -
Channel 70
, Which channel is utilized for the required bridge-to-bridge watch? - CORRECT
ANSWER - VHF-FM on Ch-13 in most areas of the continental United States
Which channel would most likely be used for routine ship-to-ship voice traffic? - CORRECT
ANSWER - Ch-08
What channel would you use to place a call to a shore telephone? - CORRECT
ANSWER - Ch-28
Which modes could be selected to receive vessel traffic lists from high seas shore stations? -
CORRECT ANSWER - SSB and FEC
Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6
assigned frequencies and in the simplex operating mode? - CORRECT ANSWER - a. For
non GMDSS ships, to maximize the chances for other vessels to receive those communications
c. For GMDSS or DSC-eqipped ships, to maximize the chances for other vessels to receive those
communications following the transmission of a DSC call of the correct priority
To set-up the MF/HF transceiver for a voice call to a coast station, the operator must: -
CORRECT ANSWER - select J3E mode for proper SITOR operations
MF/HF transceiver power levels should be set: - CORRECT ANSWER - To the lowest
level necessary for effective communications.
To set-up the MF/HF transceiver for a TELEX call to a coast station, the operator must: -
CORRECT ANSWER - select F1B mode or J2B mode, depending on the equipment
manufacturer
What is the purpose of the Receiver Incremental Tuning (RIT) or "Clarifier" control? -
CORRECT ANSWER - it acts as a "fine tune" on the receive frequency.
Questions and CORRECT Answers
What is the purpose of the INT-USA control settings on a VHF? - CORRECT ANSWER -
to change certain International Duplexes channel assignments to simplex in the US for VTS and
other purposes
VHF ship station transmitters must have the capability of reducing carrier power to - CORRECT
ANSWER - 1 watt
The Dual Watch function is used to - CORRECT ANSWER - listen on any selected
channel while periodically monitoring Ch-16
Which of the following statements best describes the correct setting for manual adjustment of the
squelch control? - CORRECT ANSWER - adjust squelch control to the minimum level
necessary to barely suppress any background noise
The Scan function is used to - CORRECT ANSWER - sequentially scan all or selected
channels
Why must all VHF Distress, Urgency and Safety communications (as well as VTS traffic calls)
be performed in Simplex operating mode? - CORRECT ANSWER - to ensure that vessels
not directly participating in the communications can hear both sides of the radio exchange
What channel must VHF-FM-equipped vessels monitor at all times when the vessel is at sea? -
CORRECT ANSWER - Channel 16
What is the aircraft frequency and emission used for distress communications? - CORRECT
ANSWER - 121.500 MHz-A3E
Which VHF channel is used only for digital selective calling? - CORRECT ANSWER -
Channel 70
, Which channel is utilized for the required bridge-to-bridge watch? - CORRECT
ANSWER - VHF-FM on Ch-13 in most areas of the continental United States
Which channel would most likely be used for routine ship-to-ship voice traffic? - CORRECT
ANSWER - Ch-08
What channel would you use to place a call to a shore telephone? - CORRECT
ANSWER - Ch-28
Which modes could be selected to receive vessel traffic lists from high seas shore stations? -
CORRECT ANSWER - SSB and FEC
Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6
assigned frequencies and in the simplex operating mode? - CORRECT ANSWER - a. For
non GMDSS ships, to maximize the chances for other vessels to receive those communications
c. For GMDSS or DSC-eqipped ships, to maximize the chances for other vessels to receive those
communications following the transmission of a DSC call of the correct priority
To set-up the MF/HF transceiver for a voice call to a coast station, the operator must: -
CORRECT ANSWER - select J3E mode for proper SITOR operations
MF/HF transceiver power levels should be set: - CORRECT ANSWER - To the lowest
level necessary for effective communications.
To set-up the MF/HF transceiver for a TELEX call to a coast station, the operator must: -
CORRECT ANSWER - select F1B mode or J2B mode, depending on the equipment
manufacturer
What is the purpose of the Receiver Incremental Tuning (RIT) or "Clarifier" control? -
CORRECT ANSWER - it acts as a "fine tune" on the receive frequency.
