单选题On vessels over 100 gross tons，whose responsibility is it to ensure that all able seamen in the vessel’s crew have the documents and qualifications required by law and regulation?（）A Master of the vesselB USCG Officer in Charge of Marine InspectionC Ow

Sailing vessels are stand-on over power-driven vessels except ______.

A.in a crossing situation

B.in a meeting situation

C.when they are the overtaking vessel

D.on the inland waters of the PR China

The Tonnage Certificate indicates ______.

A.deadweight tons

B.displacement tons

C.net tons and gross tons

D.volume tons

On which vessels is GMDSS required?______.

A.All vessels capable of international voyages

B.Vessels operating outside of the range of VHF coastal radio stations

C.SOLAS Convention ships of 300 gross tonnage or more

D.Coastal vessels of less than 300 gross tons

On vessels over 100 gross tons，whose responsibility is it to ensure that all able seamen in the vessel's crew have the documents and qualifications required by law and regulation?

A.Master of the vessel

B.USCG Officer in Charge of Marine Inspection

C.Owner or operator of the vessel

D.Company's personnel director

A shipboard oil pollution emergency plan is required of ______.

A.all vessels, regardless of size and commercial application

B.any barge or other ship which is constructed or operated in such a manner that no oil in any form can be carried aboard

C.an oil tanker of 150 gross tons or above, or other ship of 400 gross tons or above

D.an oil tanker of 400 gross tons and above, or other ships of 150 gross tons and above

There shall be two principal ______ through the harbor for the passage of vessels of over 60 tons burden．

A.straits

B.channels

C.canals

D.roadsteads

Radar reflectors are required for ______.

A.all fishing vessels over 39 feet in length

B.sail-propelled fishing vessels

C.all fishing vessels of less than 200 GT

D.wooden hull fishing vessels with a poor radar echo