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AC - DG - HL - MR - S - TZ
 
Sailing off the wind
  It’s the tack with the wind at 150° from your direction.
 
Sailing trim
  Direction of yacht in comparison to the wind. Heading into the wind you are close hauled, sailing close to the wind,moving into the wind you are jibing, sideways on, sailing off the wind running free and sailing off the wind. After running free you are said to have a fair wind.
 
Scissors position
  Sails are adjusted to run on the wind.
 
Seamark or landmark
  Object (marker, buoy, lighthouse) or clearly visible building (church, water tower, tower) marked on sea charts and used for navigation.
 
Send up
  Also to hoist.
 
Set up
  Keep taut a halyard.
 
Sextant
  Navigation instrument allowing us to calculate position by taking measurements from the stars.
 
Shake out
  Let out slightly a rope and by extension the sail.
 
Sheath
  Long case into which the spinnaker is put starting at the head and which makes it easier to lower.
 
Shoals
  In certain depths of sea, these are shallow areas where the depth suddenly declines and which the sailor must watch out for.
 
Sideways on
  See sailing trim.
 
Slacken off
  Release a taut rope, opposite of to tighten.
 
Soak the foresail
  In general the spinnaker by plunging the bow into the water.
 
Spinnaker
  Large lightweight foresail, used when you have a fair wind.
 
Spinnaker boom
  Spar fixed to the mast which separates the clew from a jib or keeps the spinnaker in place. It is set by a downhaul or stay.
 
Starboard
  Right-hand side of the boat from the helmsman.
 
Staysail
  Foresail in third position from the fore, which is set with a foresheet on a staysail stay.
 
Stay
  Rope used to support the spars such as the boom and the spinnaker boom.
 
Stay
  Taut cable between the bow and the head of the mast (or 4/5 th of the height) which keeps the mast towards the bow.
 
Stays
  All the ropes which keep up the mast.
 
Stem
  Fore part of the boat that breaks through the water.
 
Stopper knots
  All the different tying systems using a small rope tied around itself, which fix in place for example the halyards.
 
Storm jib
  This is a very small sail used in storms.
   
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