单项选择题
A.propeller B.steer C.windlass D.helm
（）(舷墙排水孔) permits the escape of water.A. A wash portB. ...
单项选择题（）(舷墙排水孔) permits the escape of water.
A. A wash port B. A bulwark port C. A+B D. Bulkhead
The （）(排水孔) is a deck drain.A.jackstaffB.bilge bracketC...
单项选择题The （）(排水孔) is a deck drain.
A.jackstaff B.bilge bracket C.scupper D.ensign
（）(富余水深) is the depth remaining under a ship’s bottom.A...
单项选择题（）(富余水深) is the depth remaining under a ship’s bottom.
A. Under-keel height B. Under-keel clearance C. Under-keel draft D. Under-keel depth
