单项选择题
A.the only preamble B.a part of the preamble C.the closing D.the suspension
Exchange of answerbacks act s a confirmation that the m...
单项选择题Exchange of answerbacks act s a confirmation that the messages（）at the destination.
A.have received B.have been received C.are received D.are being received
The distance between the two NAVTEX stations with the s...
单项选择题The distance between the two NAVTEX stations with the same B1 character should be not exceed（）nautical miles.
A.400 B.240 C.450 D.180
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
