You are backing on twin engines with rudders amidships, when your port engine stalls. To continue backing on course, you should __________.

Correct Answer: Option B — apply right rudder

With the port engine stalled, the starboard engine's thrust creates a turning moment that pushes the stern to port. To maintain a straight course while backing, the master must apply right rudder to counteract the unbalanced thrust and keep the vessel on its intended track.