题目内容
Each ship station has its own unique _________ MMSI which is included automatically in each DSC call.
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How many pieces of portable two-way VHF transceivers must a passenger ship of 1700 tons GT be provided with?
For locating the ship in distress, the SAR party will make use of _________ by starting 9GHz shipborne or airborne radars.
The frequency 156.525MHz and 156.8MHz should be in the band of _________.
In which mode should urgency communication "to all stations" by direct printing telegraphy normally be established?
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