Seamanship is the art, knowledge and competence of operating a ship, boat or other craft on water. The Oxford Dictionary states that seamanship is "The skill, techniques, or practice of handling a ship or boat at sea."
It involves topics and development of specialised skills, including navigation and international maritime law and regulatory knowledge; weather, meteorology and forecasting; watchkeeping; ship-handling and small boat handling; operation of deck equipment, anchors and cables; ropework and line handling; communications; sailing; engines; execution of evolutions such as towing; cargo handling equipment, dangerous cargoes and cargo storage; dealing with emergencies; survival at sea and search and rescue; and fire fighting.
The degree of knowledge needed within these areas is dependent upon the nature of the work and the type of vessel employed by a seafarer.
Maritime history
Seamanship on a commercial level involves a knowledge of all the different ship types (such as bulk carriers, container ships, oil tankers, cruise ships, platform supply vessels, and others), including a basic knowledge of ship recognition, a basic understanding of nautical terms, ship structure and naval architecture and cargo operations, specific to the vessel the seafarer is working on. Some ship types will have specialist cargo equipment and tools; for example, a bulk carrier may have gantry cranes or grabs for cargo or a container ship may have container lashings. Cargoes should be properly stowed and secured to prevent shifting while at sea. Oil tankers and gas carriers can be somewhat complex due to the hazardous nature of their cargoes, and therefore a greater degree of seamanship may be necessary for some vessel types compared to others.
Seamanship involves paying close attention to the stability of the vessel at all times. This involves calculation of the vessel and the effects of its cargo at various stages of the voyage (on departure, at sea and on arrival in port) to allow for safe passage and prevent capsizing (where a vessel turns on to its side or is upside down).