A、they all have different limitations with respect to coverage
B、they all have different limitations in the technology they use
C、different systems apply to different ships
D、all of above
更多“The GMDSS must combine all various subsystems, because（）.”相关的问题
A、A.Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at sea B、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、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、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
A、A conditional or partial exemption may be granted，in exceptional circumstances，for a single voyage outside the sea area for which the vessel is equipped B、Once a compulsory vessel's GMDSS station has been fitted and inspected，the station must be inspected only once every five years C、All passenger vessels and all cargo vessels that are 300 Gross Tons or larger must comply D、Compulsory vessels must carry at least two licensed GMDSS Radio Operators
A、A compulsory vessel must carry at least two (2) licensed GMDSS operators B、A compulsory vessel must satisfy certain equipment carriage requirements that are determined by where the vessel sails C、A compulsory vessel must be able to transmit and respond to distress alerts D、All of the above
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”
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
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 source of power
A、the main source of energy B、emergency source of electrical power C、the reserve source of energy D、all of above
A、A compulsory vessel must carry at least two licensed GMDSS Radio Operators B、A compulsory vessel must satisfy certain equipment carriage requirements that are determined by where the vessel sails C、A compulsory vessel must be able to transmit and respond to distress alerts D、All of the above
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
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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