Man rig refers to a person who is in charge of a ship or a boat. There are several synonyms that can be used to describe a man rig. Captain, skipper, commander, master, and helmsman are some of the commonly used words. These words depict a person who is experienced and knowledgeable about navigation, and is responsible for the safety of the vessel and its crew. A captain or a skipper is someone who leads the crew, and has the final say in all decisions made on board. A commander or a master is someone who has expertise in handling a ship, and ensures that the vessel is well-maintained. Helmsman, on the other hand, refers to someone who steers the boat or ship. The word choice depends on the context used, but all of these synonyms describe a skilled individual who is responsible for piloting a vessel.