You are proceeding in a channel, your vessel is requiring a significant amount of right rudder and your bow is still falling off to port. What can you conclude from this information?

Correct Answer: Option B — your vessel is at the outer limits of the channel

Persistent failure to respond to rudder while turning away from a bank indicates the vessel is experiencing severe asymmetric bank suction, signaling it has drifted to the dangerous outer limits of the channel.