船舶在航行中的基本阻力是______。
A.摩擦阻力
B.附体阻力
C.空气阻力
D.汹涛阻力
which order is an equivalent to “let go stern line”？
if the anchor has been heaved out of the ground and clear of the bottom, what do you report？
When will your captain come back？
what does “single up forward to breast line and spring” mean？
What’s your draft fore and aft？
