Subelement C – Equipment Operations Flashcards
(36 cards)
What is the purpose of the INT-USA control settings on a VHF?
A. To change all VTS frequencies to Duplex so all vessels can receive maneuvering orders.
B. To change all VHF channels from Duplex to Simplex while in U.S. waters.
C. To change certain International Duplex channel assignments to simplex in the U.S. for VTS and other purposes.
D. To change to NOAA weather channels and receive weather broadcasts while in the U.S.
C. To change certain International Duplex channel assignments to simplex in the U.S. for VTS and other purposes.
VHF ship station transmitters must have the capability of reducing carrier power to:
A. 1 watt.
B. 10 watts.
C. 25 watts.
D. 50 watts.
A. 1 watt.
The Dual Watch (DW) function is used to:
A. Listen to Ch-70 at the same time while monitoring Ch-16.
B. Sequentially monitor 4 different channels.
C. Sequentially monitoring all VHF channels.
D. Listen on any selected channel while periodically monitoring Ch-16.
D. 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?
A. Adjust squelch control to the minimum level necessary to barely suppress any background noise.
B. Always adjust squelch control to its maximum level.
C. Always adjust squelch control to its minimum level.
D. Adjust squelch control to approximately twice the minimum level necessary to barely suppress any background noise.
A. Adjust squelch control to the minimum level necessary to barely suppress any background noise.
The “Scan” function is used to:
A. Monitor Ch-16 continuously and switching to either Ch-70 or Ch-13 every 5 seconds.
B. Scan Ch-16 for Distress calls.
C. Scan Ch-70 for Distress alerts.
D. Sequentially scan all or selected channels.
D. 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?
A. To minimize interference from vessels engaged in routine communications.
B. To ensure that vessels not directly participating in the communications can hear both sides of the radio exchange.
C. To enable an RCC or Coast station to only hear communications from the vessel actually in distress.
D. To allow an RCC or Coast station to determine which transmissions are from other vessels and which transmissions are from the vessel actually in distress.
B. 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?
A. Channel 8.
B. Channel 16.
C. Channel 5A.
D. Channel 1A.
B. Channel 16.
What is the aircraft frequency and emission used for distress communications?
A. 243.000 MHz - F3E.
B. 121.500 MHz - F3E.
C. 156.525 MHz - F1B.
D. 121.500 MHz - A3E.
D. 121.500 MHz - A3E.
Which VHF channel is used only for digital selective calling?
A. Channel 70.
B. Channel 16.
C. Channel 22A.
D. Channel 6.
A. Channel 70.
Which channel is utilized for the required bridge-to-bridge watch?
A. DSC on Ch-70.
B. VHF-FM on Ch-16.
C. VHF-FM on Ch-13 in most areas of the continental United States.
D. The vessel’s VHF working frequency.
C. 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?
A. Ch-16.
B. Ch-08.
C. Ch-70.
D. Ch-22A.
B. Ch-08.
What channel would you use to place a call to a shore telephone?
A. Ch-16.
B. Ch-70.
C. Ch-28.
D. Ch-06.
C. Ch-28.
Which modes could be selected to receive vessel traffic lists from high seas shore stations?
A. AM and VHF-FM.
B. ARQ and FEC.
C. VHF-FM and SSB.
D. SSB and FEC.
D. 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?
A. For non-GMDSS ships, to maximize the chances for other vessels to receive those communications.
B. Answers a) and c) are both correct.
C. 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.
D. To enable an RCC or Coast station to only hear communications from the vessel actually in distress.
B. Answers a) and c) are both correct.
To set-up the MF/HF transceiver for a voice call to a coast station, the operator must:
A. Select J3E mode for proper SITOR operations.
B. Select F1B mode or J2B mode, depending on the equipment manufacturer.
C. Select J3E mode for proper voice operations.
D. Select F1B/J2B modes or J3E mode, depending on whether FEC or ARQ is preferred.
C. Select J3E mode for proper voice operations.
MF/HF transceiver power levels should be set:
A. To the lowest level necessary for effective communications.
B. To the level necessary to maximize the propagation radius.
C. To the highest level possible so as to ensure other stations cannot “break-in” on the channel during use.
D. Both a) and c) are correct.
A. 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:
A. Select J3E mode for proper SITOR operations.
B. Select F1B mode or J2B mode, depending on the equipment manufacturer.
C. Select F1B/J2B modes or J3E mode, depending on whether ARQ or FEC is preferred.
D. None of the above.
B. Select F1B mode or J2B mode, depending on the equipment manufacturer.
What is the purpose of the Receiver Incremental Tuning (RIT) or “Clarifier” control?
A. It acts as a “fine-tune” control on the receive frequency.
B. It acts as a “fine-tune” control on the transmitted frequency.
C. It acts as a “fine-tune” control on both the receive and transmitted frequencies.
D. None of the above.
A. It acts as a “fine-tune” control on the receive frequency.
On what frequency would a vessel normally call another ship station when using a radiotelephony emission?
A. Only on 2182 kHz in ITU Region 2.
B. On 2182 kHz or Ch-16, unless the station knows that the called vessel maintains a simultaneous watch on another intership working frequency.
C. On the appropriate calling channel of the ship station at 15 minutes past the hour.
D. On the vessel’s unique working radio channel assigned by the Federal Communications Commission.
B. On 2182 kHz or Ch-16, unless the station knows that the called vessel maintains a simultaneous watch on another intership working frequency.
What is the MF radiotelephony calling and Distress frequency?
A. 2670 kHz.
B. Ch-06 VHF.
C. 2182 kHz.
D. Ch-22 VHF.
C. 2182 kHz.
For general communications purposes, paired frequencies are:
A. Normally used with private coast stations.
B. Normally used between ship stations.
C. Normally used between private coast and ship
stations.
D. Normally used with public coast stations.
D. Normally used with public coast stations.
What emission must be used when operating on the MF distress and calling voice frequency?
A. J3E – Single sideband telephony.
B. A1A – On-off keying without modulation by an audio frequency.
C. F3E – Frequency modulation telephony.
D. A3E – Amplitude modulation telephony, double sideband.
A. J3E – Single sideband telephony.
Which of the following defines high frequency “ITU Channel 1212”?
A. Ch-12 in the 16 MHz band.
B. Ch-1216 in the MF band.
C. The 12th channel in the 12 MHz band.
D. This would indicate the 1st channel in the 12 MHz band.
C. The 12th channel in the 12 MHz band.
For general communications purposes, simplex frequencies are:
A. Normally used between ship stations and private coast stations.
B. Normally used with public coast stations.
C. Normally used between ship stations.
D. Both a) and c) are correct.
D. Both a) and c) are correct.
