The correct answer is D) steer the course you are on now. The helm command "Steady as you go" instructs the helmsman to maintain the vessel's current heading and not deviate from the current course. This is the correct response because it accurately describes the meaning and purpose of the command, which is to hold the vessel's present course steady without introducing any changes. The other answer choices are incorrect because they do not fully capture the essence of the "Steady as you go" command. Option A) refers to adjusting the course after a swing, option B) relates to maintaining the rate of swing, and option C) speaks to limiting the amount of course deviation, but none of these directly address the directive to hold the current course steady.