航海英語(yǔ)號(hào)燈與號(hào)型單項(xiàng)選擇題每日一練(2019.01.17)

來(lái)源：考試資料網(wǎng)

1 A single towing light will be carried above a vessel’s sternlight（）.

2 All fog signals shall be sounded every two minutes with the exception of a vessel（）.

3 A 200-meter vessel is aground in fog. Which signal is optional? （）

4 A flashing light is a light that（）.

5 A safe water daymark has what shape? （）