单项选择题
The distance a vessel moves at right angles to the original course，when a turn of 180°has been completed，is called the（）.
A.advance B.pivoting point C.tactical diameter D.kick
单项选择题 The best method to secure a towline to bitts is to（）.
单项选择题 One of your crew members falls overboard from the starboard side. You should IMMEDIATELY（）.
单项选择题 MOVING OF AN ANCHOR OVER THE SEA BOTTOM INVOLUNTARILY BECAUSE IT IS NO LONGER PREVENTING THE MOVEMENT OF THE VESSEL defines（）.
