单项选择题
A.frequency allocated B.both language and frequency C.language used D.transmission power and time
A Navtex station in each NAVAREA is usually allowed to ...
单项选择题A Navtex station in each NAVAREA is usually allowed to have（）for transmission.
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
