They can either be paddled or rowed with oars. And twelve rowers aft worked on three steering oars. Each sloop had rigging, sails, oars, and spare oars. Panokseons were propelled by both sails and oars. There are eight rowers per boat, clinging to their oars. The difference between oars and paddles is that oars are used exclusively for rowing. Oars and sails alone are used by mariners. Small dinghies under are usually powered by rowing with one set of oars. Customized canoes and oars are also available. Another important ship type was the galley which was constructed with both sails and oars. There were also ships with three masts or with ten oars. Common funerary boats were smaller sized with few oars. It was propelled by both oars and sail. The longships had two methods of propulsion&colon; oars and sail. To accommodate three levels of oars, rowers sat staggered on three levels.