单项选择题
A.10 minutes every 4 hours B.half an hour every other hour C.irregular period of time D.5 minutes every two hours
The NAVTEX receiver can be mounted on（）.A.on the bridge...
单项选择题The NAVTEX receiver can be mounted on（）.
A.on the bridge B.in the coast station C.on the forecastle D.on starboard side
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 receipt of MSI.
A.search and rescue B.safe C.co-ordinated D.hydrographic
The broadcast of MSI is made on two dedicated systems. ...
单项选择题The broadcast of MSI is made on two dedicated systems. “dedicated” means（）.
A.special B.different C.expensive D.valuable
