Question 200 Deck General

The correct answer is C) change over one steering system to the other. The "Port-Off-Stbd" selector switch on an autopilot steering stand is used to change over the steering system from one to the other, typically between port and starboard steering systems. This allows the operator to select which steering system they want to use to control the vessel's heading. The other answer choices are incorrect because: A) does not involve switching between steering systems, B) refers to bow thrusters rather than the steering system, and D) is about changing from hand electric steering to a non-followup system, which is different from switching between port and starboard steering.