Command vessels in oceans, bays, lakes, rivers, and coastal waters.

• Barge Captain
• Captain, Fishing Vessel
• Deep Submergence Vehicle Operator
• Derrick-Boat Captain
• Dredge Captain
• Ferryboat Captain
• Ferryboat Operator
• Master, Passenger Barge
• Master, Riverboat
• Master, Ship
• Master, Yacht
• Tugboat Captain

• Arrange for ships to be fueled, restocked with supplies, and/or repaired.
• Assign watches and living quarters to crew members.
• Calculate sightings of land, using electronic sounding devices, and following contour lines on charts.
• Collect fares from customers, or signal ferryboat helpers to collect fares.
• Compute positions, set courses, and determine speeds, by using charts, area plotting sheets, compasses, sextants, and knowledge of local conditions.
• Direct and coordinate crew members or workers performing activities such as loading and unloading cargo, steering vessels, operating engines, and operating, maintaining, and repairing ship equipment.
• Inspect vessels to ensure efficient and safe operation of vessels and equipment, and conformance to regulations.
• Interview and hire crew members.
• Maintain boats and equipment on board, such as engines, winches, navigational systems, fire extinguishers, and life preservers.
• Maintain records of daily activities, personnel reports, ship positions and movements, ports of call, weather and sea conditions, pollution control efforts, and/or cargo and passenger status.
• Measure depths of water, using depth-measuring equipment.
• Monitor the loading and discharging of cargo or passengers.
• Perform various marine duties such as checking for oil spills or other pollutants around ports and harbors, and patrolling beaches.
• Purchase supplies and equipment.
• Read gauges to verify sufficient levels of hydraulic fluid, air pressure, and oxygen.
• Resolve questions or problems with customs officials.
• Signal crew members or deckhands to rig tow lines, open or close gates and ramps, and pull guard chains across entries.
• Signal passing vessels, using whistles, flashing lights, flags, and radios.
• Sort logs, form log booms, and salvage lost logs.
• Steer and operate vessels, using radios, depth finders, radars, lights, buoys, and lighthouses.
• Tow and maneuver barges, or signal tugboats to tow barges to destinations.

• adhere to safety procedures
• calculate sighting of land using chart or sounding devices
• captain water vessels
• collect payment
• compute position, set course, or determine speed of vessel
• conduct training for personnel
• direct and coordinate activities of workers or staff
• hire, discharge, transfer, or promote workers
• identify positions of celestial bodies for navigational purposes
• inspect facilities or equipment for regulatory compliance
• inspect transportation equipment for damage or defects
• interview job applicants
• maintain records, reports, or files
• maintain repair records
• measure water depth
• monitor equipment or machine operation to detect problems
• monitor sonar or navigational aids
• operate boat or towing equipment
• operate emergency fire or rescue equipment
• operate navigation technology or equipment
• order helmsperson to steer vessel
• order or purchase supplies, materials, or equipment
• oversee execution of organizational or program policies
• oversee marine cargo handling
• perform safety inspections in transportation setting
• prepare reports
• prepare safety reports
• read maps
• read navigation charts
• recognize reefs, shoals, or other hazards by navigation aids
• schedule employee work hours
• signal directions or warnings to coworkers
• stand watch on vessel
• steer boat or ship
• supervise crew aboard ship
• understand admiralty law
• use established traffic or transportation procedures
• use knowledge of seamanship or boat handling
• use knowledge of tides and currents
• use local or regional geographical knowledge to transportation
• use two-way radio or mobile phone