单项选择题
Which vessel would display a cone，apex downward（）.
A.A fishing vessel with outlying gear B.A vessel proceeding under sail and machinery C.A vessel engaged in diving operations D.A vessel being towed
单项选择题 Which statement is TRUE in an overtaking situation（）.
单项选择题 Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals（）.
单项选择题 Which instrument is used to predict the approach of a low pressure system（）.
