航海英語(yǔ)船舶檢驗(yàn)報(bào)告單項(xiàng)選擇題每日一練(2019.01.25)

來(lái)源：考試資料網(wǎng)

1 Periodic surveys to renew the load line assignment for a ship must be made at intervals not exceeding（）.

2 Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.

3 The annual survey for endorsement of a Load Line Certificate must be held within（）.

4 A vessel engaged in（）shall not impede the passage of any other vessel navigating within anarrow channel or fairway.

5 The bottom of the mast rests on a part of the keel called the mast（）.