单项选择题
A.make the trip only after obtaining a Permit to Proceed to Another Port for Repair，Form CG-948
B.get underway as soon as possible
C.hire a tug and pilot instead
D.request an Expiration Certificate if the vessel displays a tendency to sink
单项选择题 A bridge over a navigable waterway is being repaired. There is a traveller platform under the bridge’s deck that significantly reduces the vertical clearance. If required by the CG district commander，how will this be indicated at night?（）
单项选择题 （）of the following items is not in the charge of Chief Officer in repairing operation.
单项选择题 （）about 20 sq.m to be sand-blasted.