单项选择题
A.not required to be marked anywhere on the vessel
B.required to be marked on both bows and on the keel
C.required to be marked on the stern with the name of the vessel marked on both bows
D.required to be marked on the keel, stern, and both bows
单项选择题 The maritime labour certificate shall be issued to（）by the competent authority,or by a recognized organization duly authorized for this purpose.
单项选择题 Prior to taking over the deck watch in port,the relieving officer shall not be informed by the officer in charge of the deck watch as to（）.
单项选择题 A vessel constrained by her draft shall, when she overtakes a sailing vessel in a fairway,the sailing vessel is（）.