单项选择题
A.three balls in a vertical line B.two balls in a vertical line C.one ball near the foremast and one ball at each fore yard D.one diamond near the foremast head and one ball at each fore yard
A vessel being towed will show（）.A.a forward masthead l...
单项选择题A vessel being towed will show（）.
A.a forward masthead light B.sidelights and a sternlight C.a towing light D.All of the above
A vessel being towed astern shall show at night（）.A.the...
单项选择题A vessel being towed astern shall show at night（）.
A.the lights required for a power-driven vessel underway B.only the required masthead lights C.a sternlight only D.sidelights and a sternlight
A vessel being pushed ahead is required to carry which ...
单项选择题A vessel being pushed ahead is required to carry which of the following lights?（）.
A.Sidelights and a stern light B.Sidelights only C.Sidelights and a small white light at each end D.A small white light at each end
