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GMDSS ELEMENT 1 PT 2 WITH COMPLETE SOLUTIONS
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1-13C1 What is the purpose of the INT-USA control settings on a VHF? - ANSWER To change certain International Duplex channel assignments to simplex in the U.S. for VTS and other purposes.
1-13C2 VHF ship station transmitters must have the capability of reducing carrier power to: - ANSWER 1 watt.
1-13C3 The Dual Watch (DW) function is used to: - ANSWER Listen on any selected channel while periodically monitoring Ch-16.
1-13C4 Which of the following statements best describes the correct setting for manual adjustment of the squelch control? - ANSWER Adjust squelch control to the minimum level necessary to barely suppress any background noise.
1-13C5 The "Scan" function is used to: - ANSWER Sequentially scan all or selected channels.
1-13C6 Why must all VHF Distress, Urgency and Safety communications (as well as VTS traffic calls) be performed in Simplex operating mode? - ANSWER To ensure that vessels not directly participating in the communications can hear both sides of the radio exchange.
1-14C1 What channel must VHF-FM-equipped vessels monitor at all times when the vessel is at sea? - ANSWER Channel 16.
1-14C2 What is the aircraft frequency and emission used for distress communications? - ANSWER 121.500 MHz - A3E.
1-14C3 Which VHF channel is used only for digital selective calling? - ANSWER Channel
1-14C4 Which channel is utilized for the required bridge-to-bridge watch? - ANSWER VHF-FM on Ch-13 in most areas of the continental United States.
1-14C5 Which channel would most likely be used for routine ship-to-ship voice traffic? - ANSWER Ch-08.
1-14C6 What channel would you use to place a call to a shore telephone? - ANSWER Ch-06.
1-15C1 Which modes could be selected to receive vessel traffic lists from high seas shore stations? - ANSWER SSB and FEC.
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? - ANSWER All of the above
1-15C3 To set-up the MF/HF transceiver for a voice call to a coast station, the operator must: - ANSWER Select J3E mode for proper voice operations.
1-15C4 MF/HF transceiver power levels should be set: - ANSWER To the lowest level necessary for effective communications.
1-15C5 To set-up the MF/HF transceiver for a TELEX call to a coast station, the operator must: - ANSWER Select F1B mode or J2B mode, depending on the equipment manufacturer.
1-15C6 What is the purpose of the Receiver Incremental Tuning (RIT) or "Clarifier" control? - ANSWER It acts as a "fine-tune" control on the receive frequency.
1-17C5 The best way to test the Inmarsat-C terminal is? - ANSWER Compose and send a brief message to your own Inmarsat-C terminal
1-17C6 When may you test a radiotelephone transmitter on the air? - ANSWER At any time (except during silent periods) as necessary to assure proper operation.
1-18C1 Under normal circumstances, what do you do if the transmitter aboard your ship is operating off-frequency, overmodulating or distorting? - ANSWER Stop transmitting.
1-18C2 Which would be an indication of proper operation of a SSB transmitter rated at 60 watt PEP output? - ANSWER In SITOR communications, the power meter can be seen fluctuating regularly from zero to the 60 watt relative output reading.
1-18C3 If a ship radio transmitter signal becomes distorted: - ANSWER Cease operations.
1-18C4 What would be an indication of a malfunction on a GMDSS station with a 24 VDC battery system? - ANSWER A constant 30 volt reading on the GMDSS console voltmeter.
1-18C5 Your antenna tuner becomes totally inoperative. What would you do to obtain operation on both the 8 MHz and 22 MHz frequency bands? - ANSWER Bypass the antenna tuner. Use a straight whip or wire antenna approximately 30 ft long.
1-18C6 Which of the following conditions would be a symptom of malfunction in a 2182 kHz radiotelephone system that must be reported to the Master, then logged appropriately. - ANSWER No indication of power output when speaking into the microphone.
1-19D1 What are the antenna requirements of a VHF telephony coast, maritime utility or ship station? - ANSWER The shore or on-board antenna must be vertically polarized.
1-19D2 What is the antenna requirement of a radiotelephone installation aboard a passenger vessel? - ANSWER The antenna must be vertically polarized and as non-directional and efficient as is practicable for the transmission and reception of ground waves over seawater.
1-19D3 What is the most common type of antenna for GMDSS VHF? - ANSWER None of the above
1-19D4 What is the purpose of the antenna tuner? - ANSWER It alters the electrical characteristics of the antenna to match the frequency in use.
1-19D5 What advantage does a vertical whip have over a long wire? - ANSWER It radiates equally well in all directions.
1-19D6 A vertical whip antenna has a radiation pattern best described by? - ANSWER A circle.
1-20D1 For a small passenger vessel inspection, reserve power batteries must be tested: - ANSWER At intervals not exceeding 12 months, or during the inspection.
1-20D2 What are the characteristics of the Reserve Source of Energy under GMDSS? - ANSWER Must be independent of the ship's electrical system when the RSE is needed to supply power to the GMDSS equipment.
1-20D3 Which of the following terms is defined as a back-up power source that provides power to radio installations for the purpose of conducting Distress and Safety communications when the vessel's main and emergency generators cannot? - ANSWER Reserve Source of Energy.
1-20D4 In the event of failure of the main and emergency sources of electrical power, what is the term for the source required to supply the GMDSS console with power for conducting distress and other radio communications? - ANSWER Reserve source of energy.
a RADAR display? - ANSWER A series of 12 equally spaced dots.
1-22D3 What is the purpose of the SART's audible tone alarm? - ANSWER It informs survivors that assistance may be nearby.
1-22D4 Which statement is true regarding the SART? - ANSWER This is a 9 GHz transponder capable of being received by vessel's X-band navigational RADAR system.
1-22D5 At what point does a SART begin transmitting? - ANSWER If it has been placed in the "on" position, it will respond when it has been interrogated by a 9-GHz RADAR signal.
1-22D6 How can a SART's effective range be maximized? - ANSWER The SART should be held as high as possible.
1-23D1 Which statement is NOT true regarding the requirements of survival craft portable two-way VHF radiotelephone equipment? - ANSWER Operates simplex on Ch-70 and at least one other channel.
1-23D2 Which statement is NOT true regarding the requirements of survival craft portable two-way VHF radiotelephone equipment? - ANSWER Operation on Ch-13.
1-23D3 With what other stations may portable survival craft transceivers communicate?
1-23D4 Equipment for radiotelephony use in survival craft stations under GMDSS must have what capability? - ANSWER Operation on Ch-16.
1-23D5 Equipment for radiotelephony use in survival craft stations under GMDSS must have what characteristic(s)? - ANSWER All of the above
1-23D6 What is the minimum power of the SCT - ANSWER One watt.
1-24D1 NAVTEX broadcasts are sent: - ANSWER In categories of messages indicated by a single letter or identifier.
1-24D2 MSI can be obtained by one (or more) of the following: - ANSWER All of the above
1-24D3 Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally? - ANSWER 518 kHz.
1-24D4 What means are used to prevent the reception of unwanted broadcasts by vessels utilizing the NAVTEX system? - ANSWER Programming the receiver to reject unwanted broadcasts.
1-24D5 When do NAVTEX broadcasts typically achieve maximum transmitting range? - ANSWER Middle of the night.
1-24D6 What is the transmitting range of most NAVTEX stations? - ANSWER Typically 200-400 nautical miles (360-720 km).
