单项选择题
A.eddies under the bar
B.swift current under the bar causing loss of control
C.cross-currents pushing the tow away from the bar
D.cross-currents pushing the tow into the bar
单项选择题 When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind，the approach is best made（）.
单项选择题 When approaching Block Island Sound from Long Island Sound，you will enter waters governed by the International Rules of the Road when you（）.
单项选择题 Two vessels are approaching each other near head on. What action should be taken to avoid collision?（）.