this should be C. good practice is to sound the whistle when leaving the dock no matter what the engines are doing or whether she's power or sail driven.
Deck
Rules of the Road: INLAND ONLY A vessel leaving a dock or berth must sound a prolonged blast of the...
Discussing this exam question.
its not about "Good Practice" its what is the rite answer, this is a test, Rite?
Rule 34 (g)