Whistle signals indicating course changes must be sounded _________.(1.0)
A.in fog B.when vessels are in sight of one another C.when you can be reasonably sure of hearing the other vessel’s acknowledgment D.every time you alter course正确答案B
Whistle signals indicating course changes must be sounded _________.(1.0)
A.in fog B.when vessels are in sight of one another C.when you can be reasonably sure of hearing the other vessel’s acknowledgment D.every time you alter course正确答案B
