When your vessel enters thick fog, she should sound every two minutes in accordance with these Rules.(1.0)
A.one short blast B.one prolonged blast C.two short blasts D.three short blasts正确答案B
When your vessel enters thick fog, she should sound every two minutes in accordance with these Rules.(1.0)
A.one short blast B.one prolonged blast C.two short blasts D.three short blasts正确答案B
