单项选择题
A vessel aground would show the same dayshape as a（）.
A.vessel towing a submerged object B.dredge underway and dredging C.hydrographic survey vessel at anchor and surveying D.None of the above
单项选择题 A survey (special purpose mark) buoy（）.
单项选择题 A gas-free certificate would usually be issued by a(n)（）.
单项选择题 A complaint of unseaworthiness by a majority of crew members to the American Consul is found to be justified after a survey is completed. Who must pay the cost of the survey?（）
