單項(xiàng)選擇題Navtex transmitter identification character（）is used to identify the broadcasts which are to be accepted by the receiver and those are to be rejected.

A.B2
B.B1
C.MAR
D.NNN


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題The difference between international and national Navtex Service is limited to（）.

A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題It is possible for ships to receive safety message transmitted by Navtex station（）.

A.in any INMARSAT regions
B.in each NAVTEX area
C.at any distance
D.in Areas A3 and A4

4.單項(xiàng)選擇題The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.

A.navigational / typhoon
B.traffic / meteorological
C.marine / hurricane
D.navigational / meteorological

5.單項(xiàng)選擇題Distress alerts will be relayed on the（）when the RCC considers it necessary.

A.dedicated system
B.MSI broadcasts
C.518KHZ
D.channel 16