Final answer:
A boat with limited maneuverability is indicated by a marker with red and white horizontal stripes (Answer A). This signifies that the vessel cannot easily move out of the way due to certain activities it may be performing.
Step-by-step explanation:
The marker that indicates a boat has limited maneuverability is characterized by red and white horizontal stripes. These markers are used to signal to other boaters that the vessel has some restriction that prevents it from moving out of the way easily. This is often the case with large vessels engaged in certain activities, such as towing, dredging, or underwater operations, which require them to maintain a certain course and speed and limit their ability to maneuver quickly out of the way of other vessels.
The correct answer to the question is A) Red and white horizontal stripes. The other options presented refer to different markers or signals that have other meanings on the water. A green square is typically used to indicate the right side of a channel when returning from sea, a yellow diamond is a cautionary marker, and a black ball is used to signal that a vessel is at anchor or not under command under some circumstances.