单项选择题
A.strike B.strikes C.are striking D.struck
（）all ships in a large sea area being alerted, an “area...
单项选择题（）all ships in a large sea area being alerted, an “area call” will normally be transmitted so that only those ships in the vicinity of the distress incident are alerted.
A.Avoiding B.To be avoided C.Avoided D.To avoid
The concept of NAVTEX is of a（）system for the broadcast...
单项选择题The concept of NAVTEX is of a（）system for the broadcast and reception of MSI.
A.complete service B.partial controlled C.quite new D.total co-ordinated
If no distress acknowledgement is received（）a DSC distr...
单项选择题If no distress acknowledgement is received（）a DSC distress call transmission, then the ship in distress may repeat the DSC distress call attempt after a delay of between 3.5 and 4.5 minutes from the beginning of the initial call.
A.relevant to B.relate to C.in response to D.in relation to
