Mate- Ship, Boat, and Barge perform the work for captains on vessels. Supervises and coordinates the activities for the crew aboard the ship. Being a Mate- Ship, Boat, and Barge possesses necessary certifications. Familiar with a variety of the field's concepts, practices, and procedures. Additionally, Mate- Ship, Boat, and Barge relies on experience and judgment to plan and accomplish goals. Performs a variety of complicated tasks.