航海英语(甲类船长)海上通信单选题练习1
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Channel 13（156．65 MHz），the designated bridge-to-bridge channel，may NOT be used to ______．
- A.exchange navigational information between vessels
- B.exchange navigational information between a vessel and a shore station
- C.conduct necessary tests
- D.exchange operating schedules with company dispatcher
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______ will be broadcast every one hour on VHF Channel 6．
- A.VHF News
- B.Channel Rules
- C.Visibility Time
- D.Navigational Warnings
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The control of distress traffic is the responsibility of _____．
- A.the owners
- B.the charterers
- C.the shipper
- D.the vessel in distress or of the station that relays the distress message
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______ the jumbo everything is ready for loading．
- A.Except
- B.Excepting
- C.Except for
- D.Except that
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You are signing on a deck officer，who will be designated as one of the GMDSS operators，before sailing foreign．Which statement is TRUE ________．
- A.He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System”
- B.He/she must present either an FCC-issued license or a Coast Guard-issued license
- C.You must consult the“List of Qualifications”on the reverse of his/her FCC-issued license
- D.His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer”
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Which statement is TRUE ________．
- A.Key letters or abbreviations may not be used in GMDSS radio logbooks under any circumstance
- B.Urgent communications do not need to be entered in the GMDSS radio log
- C.Both of the above
- D.None of the above
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Which statement concerning satellite EPIRBs is TRUE ________．
- A.Once activated，these EPIRBs continuously send up a signal for use in identifying the vessel and for determining the position of the beacon
- B.The coded signal identifies the nature of the distress situation
- C.The coded signal only identifies the vessel's name and port of registry
- D.If the GMDSS Radio Operator does not program the EPIRB，it will transmit default information such as the follow-on communications frequency and mode
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Which statement is generally correct regarding the maintenance requirements for ships under GMDSS ________．
- A.Redundancy of functions of certain equipment will partially meet this requirement
- B.On-board maintenance provided by a person holding a GMDSS maintainer's license will partially meet the requirements
- C.Shoreside maintenance and scheduled tests and inspections will partially meet this requirement
- D.All of the above
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Which statement is TRUE ________．
- A.GMDSS radio logs are required to contain entries pertaining to all incidents connected to radio communication service which appear to be of importance to the safety of life at sea
- B.All distress communications must be entered in the GMDSS radio log．
- C.Both of the above
- D.None of the above
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Which statement concerning locating signals in the GMDSS is FALSE ________．
- A.Locating signals are transmitted by survival craft VHF transceivers
- B.Locating signals are transmitted by SARTs
- C.Locating signals are intended to facilitate the finding of a distressed vessel or its survivors
- D.Locating signals are not transmitted by autoalarm generators
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Which statement concerning reserve sources of energy for GMDSS is FALSE ________．
- A.While the ship is at sea，there must be available at all times a supply of electrical energy sufficient to operate the radio installations and to charge any batteries used as part of a reserve source of energy
- B.Both the VHF and MF/HF installations must be simultaneously supplied
- C.A means of ensuring a continuous supply of electrical power must be provided to all GMDSS equipment that could be affected by an interruption in power
- D.If a UPS or equivalent is used to supply power to the ship's GPS receiver or other source of positional information，a means must be provided to ensure the continuous supply of the information in the event of a failure to the ship's main or emergency sou
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Which statement concerning GMDSS Radio Operator requirements is FALSE ________．
- A.Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at sea
- B.Each compulsory vessel must carry at least two licensed Radio Operators at all times while at sea and may elect to carry a GMDSS Radio Maintainer as well
- C.Communications involving safety of life at sea do not have to be logged as long as the compulsory vessel was not involved in such communications
- D.While at sea，adjustments to，and the maintaining of，GMDSS equipment may be performed by the GMDSS Radio operator as long as the work is supervised by an onboard licensed GMDSS Radio Maintainer
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Which maintenance functions can a GMDSS Radio Operator perform ________．
- A.The Operator can make fine internal adjustments to the transmitter as long as the output power does not change by more than one percent
- B.The Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstacles
- C.All levels of maintenance must be performed by a licensed GMDSS Radio Maintainer
- D.The Operator may install an EPROM in order to ensure that the equipment continues to operate within legal constraints
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Which message categories cannot be disabled by the GMDSS radio operator ________．
- A.Navigational Warnings
- B.Meteorological Warnings
- C.Search and Rescue Information
- D.All of the above
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What is meant by the term“radio silence”________．
- A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel
- B.Stations remaining off the air to safeguard proprietary information
- C.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting“window”for distressed vessels to transmit distress alerts using J3E
- D.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic
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You are monitoring VHF Channel 16 when you receive a call to your vessel，TEXAS PRIDE．What is the proper way to answer this call ________．
- A.This is TEXAS PRIDE．Pick a channel
- B.This is TEXAS PRIDE on Channel 16．Come back
- C.This is TEXAS PRIDE，WSR 1234，reply Channel 10
- D.Please stand by．We're busy right now
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Which device provides the main means in the GMDSS for locating ships in distress or their survival craft ________．
- A.Radio direction finder
- B.Satellite EPIRBs
- C.MF/HF DSC
- D.VHF homing device
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Which categories of NAVTEX messages may not be selectively rejected through receiver programming ________．
- A.Navigational warnings
- B.Weather warnings
- C.SAR and distress alert information
- D.All of the above
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Which frequencies and modes are allocated for distress alerting in GMDSS ________．
- A.406 MHz via EPIRB
- B.1626.5-1645.5 via INMARSAT
- C.Channel 70 DSC plus six（6）MF/HF DSC frequencies
- D.All of the above
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Which action should be taken on receipt of a GMDSS distress alert ________．
- A.Read the display screen and/or printout
- B.Silence the alarm
- C.Listen for any follow up voice/telex transmission on the appropriate frequency
- D.All of the above
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Where should the GMDSS radio log be kept on board ship ________．
- A.In the Captain's office
- B.In the sea cabin
- C.At the GMDSS operating position
- D.Anywhere on board the vessel
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When the GMDSS Radio Operator on watch hears“SECURITE”spoken three times he can expect to receive a message concerning ______．
- A.The safety of navigation or important meteorological warnings
- B.The safety of a vessel or a person is in jeopardy
- C.A vessel in need of immediate assistance
- D.A coast station traffic list
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What publications should a GMDSS Operator consult regarding the proper set-up and operation of vessel equipment ________．
- A.ITU Publications
- B.The manufacturers instruction manuals
- C.Part 90 of the FCC Rules and Regulations
- D.Code of Federal Regulations，Title 47，Part 80，Subpart W
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What are the vessel equipment and personnel requirements for GMDSS ________．
- A.Two licensed GMDSS radio operators
- B.Equipment carriage requirements
- C.Distress alerting and response
- D.All of the above
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What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received ________．
- A.No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency
- B.The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received
- C.The Operator should immediately set continuous watch on VHF channel 70
- D.The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received
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What is the most appropriate action for a GMDSS radio operator to take in a distress situation where immediate help is needed，but the vessel is not sinking nor needs to be abandoned ________．
- A.Switch off EPIRB and SART manually
- B.Transmit distress call by MF/HF，VHF or INMARSAT
- C.Notify the RCC（Rescue Coordination Center）through VHF FM on channel 13
- D.Transmit distress call by activating the radiotelegraph automatic alarm signal
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The Consol navigation system，used in Russian and Northern European waters，can be used ______．
- A.For precise navigation in coastal waters
- B.By measuring the phase difference of the dots and dashes
- C.As an aid to ocean navigation
- D.If the vessel is fitted with a special Consol receiver
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The data travels from the ______ to the INMARSAT Network Coordination Station（NCS）and then down to the SES's on ships at sea．
- A.VHF
- B.SART
- C.NAVTEX
- D.LES
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Reliable delivery of messages is ensured by ______ techniques．
- A.forward error correction
- B.aftward error correction
- C.DGPS
- D.error-free and low error reception
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The ______ provides the link between the Space Segment and the land-based National/International fixed communications networks．
- A.VHF
- B.SART
- C.NAVTEX
- D.LES
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If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens ________．
- A.The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator
- B.The transmission is not initiated and“ERROR”is indicated on the display readout
- C.The transmission will be made with“default”information provided automatically
- D.The receiving station will poll the DSC unit of the vessel in distress to download the necessary information
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For GMDSS，when may a compulsory vessel not be allowed to leave port ________．
- A.When the vessel is in an overloaded condition
- B.When the vessel has arranged for both duplication of equipment AND shore-based maintenance
- C.When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or logged
- D.When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions
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How long must the GMDSS radio log be retained on board ________．
- A.At least two years after the last entry
- B.At least one year after the last entry
- C.At least 90 days after the last entry
- D.At least 30 days after the last entry
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______ operates at a transfer rate of up to 9600 bits per second and is telephone，telex and facsimile（fax）capable．
- A.INMARSAT A
- B.INMARSAT C
- C.SafetyNET
- D.NAVTEX
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Each satellite broadcasts ______ traffic on a designated channel．
- A.LES
- B.ESA
- C.NCS
- D.EGC
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At sea，all required GMDSS equipment（other than survival craft equipment）must be proven operational by ______．
- A.daily testing
- B.either A or C
- C.operational use of the equipment
- D.testing at least every 48 hours
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______ is an area within the radiotelephone coverage of at least one VHF coast station in which continuous Digital Selective Calling is available．
- A.Sea Area A1
- B.Sea Area A2
- C.Sea Area A3
- D.Sea Area A4
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______ is not required by bridge-to-bridge communications．
- A.VHF
- B.SART
- C.NAVTEX
- D.LES