The source of energy fitted in GMDSS complying vessels must be().
A、the main source of energy
B、emergency source of electrical power
C、the reserve source of energy
D、all of above
A、the main source of energy
B、emergency source of electrical power
C、the reserve source of energy
D、all of 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、Electrical energy B、Thermal energy C、Potential energy D、Kinetic energy
A、Energy can be created or destroyed B、Energy may not be transformed C、The total quantity of energy in the universe is always the same D、None of the above
A、mechanical energy to kinetic energy to potential energy B、mechanical energy to potential energy to kinetic energy C、potential energy to mechanical energy to kinetic energy D、kinetic energy to mechanical energy to potential energy