He could hear the boat’s whistle wail out in a frantic cadence.

他能听到船的汽笛声以一种疯狂的节奏发出。

The book of Pilot Rules on my lap provided that the boat in our position should swing to starboard, passing to port, and should give two short distinct blasts on the boat's whistle to signify its intention.

我膝上的《引航员规则》规定，我们所在位置的船应向右舷摆动，驶向左舷，并应在船的汽笛上发出两声短促而明显的声音，以表示其意图。