航海英語GMDSS單項選擇題每日一練(2019.01.17)

來源：考試資料網(wǎng)

1 SafetyNet is a maritime safety information broadcast service offering（）on suitably equipped ships.

2 The ARQ mode should be applied（）.

3 A Navtex station in each NAVAREA is usually allowed to have（）for transmission.

4 Where should the GMDSS radio log be kept on board ship（）.

5 The frequency（）the safety message will be transmitted shall be included in DSC safety call.