Scope – Technically, the ratio of length of anchor rode in use to the vertical distance from the bow of the vessel to the bottom of the water. Usually six to seven to one for calm weather and more scope in storm conditions.
Screw – A boat's propeller.
Scuppers – Drain holes on deck, in the toe rail, or in bulwarks or (with drain pipes) in the deck itself.
Sea cock – A through hull valve, a shut off on a plumbing or drain pipe between the vessel's interior and the sea.
Scope – Technically, the ratio of length of anchor rode in use to the vertical distance from the bow of the vessel to the bottom of the water. Usually six to seven to one for calm weather and more scope in storm conditions.
Screw – A boat's propeller.
Scuppers – Drain holes on deck, in the toe rail, or in bulwarks or (with drain pipes) in the deck itself.
Sea cock – A through hull valve, a shut off on a plumbing or drain pipe between the vessel's interior and the sea.
Sea Room – A safe distance from the shore or other hazards.
Secure – To make fast.
Set – Direction toward which the current is flowing.
Slack – Not fastened; loose. Also, to loosen.
Sole – Cabin or saloon floor. Timber extensions on the bottom of the rudder. Also the molded fiberglass deck of a cockpit.
Sounding – A measurement of the depth of water.
Spring Line – A pivot line used in docking, undocking, or to prevent the boat from moving forward or astern while made fast to a dock.
Square Knot – A knot used to join two lines of similar size. Also called a reef knot.
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