A qualified deck officer should be（）the watch.

单项选择题While the Pilot is maneuvering the vessel to a dock，what is the PRIMARY responsibility of the watch officer?（）

A.Insure that helm and throttle orders given by the Pilot are correctly executed
B.Judge the appropriateness of the Pilot's orders and countermand them if necessary
C.Supervise the signaling and flag etiquette
D.Record the bells and their times in the bell book

单项选择题Which word indicates color variation in the characteristics of a light?（）

A.Opposing
B.Changing
C.Reversing
D.Alternating

单项选择题Which two components pass through the shank of an LWT anchor?（）

A.Anchor shackle and stock
B.Tripping palm and flukes
C.Crown and chocks
D.Swivel and stabilizer bar

单项选择题Which statement describes the shore between Watch Hill Point and Point Judith? （）

A.Low，rocky cliffs with heavily wooded hills inland
B.Sandy beaches broken by rocky points
C.Sand dunes and beaches with a mud and sand bottom
D.Wooded，barren hills with isolated prominent buildings

单项选择题Which fitting is used to connect the boom to the mast? （）

A.Clevis pin
B.Gunter-lug
C.Gooseneck
D.Transom