You have completed a crude oil wash. What action should be taken with the oil in the lines running to the washing machines?

Correct Answer: Option A — Open a COW nozzle forward and one aft and drain the line into the after tank by gravity

Pursuant to 33 CFR 157.132, following completion of crude oil washing operations, all COW supply lines must be drained of oil into a cargo or slop tank. Opening a forward and an after washing nozzle allows gravity draining into the designated tank, preventing line overpressurization, thermal expansion leaks, or deck spills.