航海英語遇險通信單項選擇題每日一練(2019.07.27)

來源：考試資料網(wǎng)

1 If your vessel is underway in fog and you hear one prolonged and three short blasts，this indicates a（）.

2 At night，if you see a vessel ahead displaying the lights shown you should（）.

3 Distress flares and smoke signals for small passenger vessels（）.

4 TO EVACUATE A VESSEL FROM CREW AND PASSENGERS FOLLOWING A DISTRESS means（）.

5 Which condition represents the appropriate time for setting off distress flares and rockets? （）