On a gas turbine powered vessel, what is the last step after an off-line water wash?

Correct Answer: Option B — Start the engine to dry it out.

Following an off-line water wash, residual moisture must be removed from the compressor and turbine sections to prevent corrosion and potential damage during the next start. Running the engine at a low idle or dry-cranking allows the heat of the engine to evaporate remaining water, ensuring a dry internal environment.