航海英語(yǔ)GPS、DF及LC的使用單項(xiàng)選擇題每日一練(2019.01.23)

來(lái)源：考試資料網(wǎng)

1 （）is not an alarm required by IMO standards to be available on the ECDIS.

2 A single vertical magnet placed underneath the compass in the binnacle is used to compensate for（）.

3 The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.

4 Magnetic compass deviation（）.

5 The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.