Satellite Navigation -- a way of finding locations using satellites

Scope -- the ratio of the ”Rode” length to the distance from the vessel to the bottom  -- in calm weather, usually six or seven to one

Screw -- the propeller

Scuppers -- an opening for water drainage

Sea Cock -- a shut-off valve on piping between the vessel’s hull and the water

Seamanship -- a general term for all the skills needed to operate a boat, including vessel maintenance, and navigation

Sea Room -- the distance needed from the shore and other objects to maintain safety

Seaworthy -- capable of meeting the requirements needed for use on an aquatic vessel

Set -- toward the current, or spread the sail out to catch the wind

Ship -- an aquatic vessel large enough to carry a “Boat” on board

Slack -- loose

Sole -- the floor of the cabin, or extensions on the bottom of the rudder

Sounding -- the measure of the water’s depth

Spring Line -- a rope used to tow a vessel or fastening it to dock

Squall -- a gust of powerful wind often followed by perspiration

Square Knot -- a simple knot used to secure two lines of similar size

Standing Part -- the taut part of the line at the opposite end of the “Bight”  

Stand-on Vessel -- the vessel with the right-of-way when ships pass each other, the opposite of the “Give-way Vessel”

Starboard -- When facing the “Stem,” the right side of the boat, the opposite of “Port”

Stem -- the farthest forward tip of the vessel

Stern -- the farthest rear point of the boat

Stern Line -- a line securing the stern of the ship to the dock

Stow -- to secure an item, especially cargo, in its intended place

Swamp -- to become full of water but not to the point of sinking