48. You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what action should be carried out?

Correct Answer: Option D — Remove the bilge manifold valve and attempt to back flush the line.

When a bilge suction is fouled, back-flushing the line from the manifold is the standard procedure to clear debris. This uses the pump's discharge pressure or a separate water source to force the obstruction back into the bilge, restoring suction capability without requiring hazardous manual entry into the bilge well.