单项选择题
A.take proper and effective action to avoid collision
B.be stopped within a distance appropriate to the prevailing circumstances and conditions
C.neither A nor B
D.both A and B
单项选择题 As you approach Shreves cut-off you see Red River LandingGage (302.4 AHP) which reads 4.2 feet. Which of thefollowing statements is TRUE? （）
单项选择题 As you approach Kate Aubrey Bar Light (mile 788 AHP)，yoursearchlight will show what type of marking at the light? （）
单项选择题 An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam? （）