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Half hitch |
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Classic knot where one of the strands is taut.
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Halyard |
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Rope used to raise the sails.
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Hatchway |
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Passage between the helmsman’s position and the inside
of the yacht.
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Hawser |
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Rope used to moor the yacht.
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Headway |
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The remaining energy after the forward propulsion has been stopped.
This is what brings the yacht close to a buoy after the sails
have been shaken out.
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Headwind |
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From the moment the boat is heading into the wind.
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Heave to |
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Where the two sails are placed so that their effect is opposed.
The yacht drifts slightly and takes up a more stable position
in the water.
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High pressure area |
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Pressure area, where the wind is light or even absent.
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Incidence |
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Angle of the sail to the wind that is blowing.
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In commission |
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Fitted out with all the necessary equipment to set out to sea.
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Inertia |
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Force of resistance to other forces.
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InmarsatB-1 |
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This is a digital service allowing the transmission of voice,
data and pictures at a speed up to 64kbits/sec.
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Inmarsat-C |
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This
is the two-way communications system allowing the transmission
of written messages by telex, Minitel, fax, or computer on land
and other mobile users of the Inmarsat system..
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Inmarsat-Phone (m) |
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The complete service which allows communications by voice, fax,
data transfer and downloading of weather bulletins for example.
It is in fact a broadcast system.
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Jackstay |
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Link between the mast and boom.
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Jib |
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Small foresail (or solent), located in second position from
the fore.
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Jib boom |
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Spar fixed in the stern of the yacht allowing you to move the
tack of the fore sails .
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Knot |
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Tie or unit of speed equal to one mile an hour.
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Keel |
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Part of the hull of the boat under the waterline. Also called
the vitals.
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Keel over |
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This
means to capsize.
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Laminar |
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Smooth streamline flow of a fluid.
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Leading or trailing edge |
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The side from which fluid comes or goes.
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Leg |
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Distance covered in a certain tack (close to the wind or running
free).
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Lift |
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Ratio of drag to lift and by extension the lift effect of the
sails .
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Lift |
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Part of the aerodynamic force ( or hydro force) directed perpendicular
to the wind direction (or current).
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Light squall |
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Slight increase in the wind.
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Log |
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Instrument used to measure the speed of the yacht.
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Low pressure area |
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Area of low pressure where winds are generally strong or storm
force.
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Lower shroud |
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Shroud fixed under the pole rails.
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Luff |
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Front side of the sail from the tack to the clew. It is kept
taut on the stay or mast by halyards.
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Lunging |
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Involuntary pitching of the yacht.
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