Windward and leeward directions (and the
points of sail they create) are important factors to consider in such wind-powered or wind-impacted activities as
sailing,
wind-surfing,
gliding,
hang-gliding, and
parachuting. Other terms with broadly the same meaning are widely used, particularly
upwind and
downwind.
Nautical Among sailing craft, the windward vessel is normally the more maneuverable. For this reason, rule 12 of the
International Regulations for Preventing Collisions at Sea, applying to sailing vessels, stipulates that where two are sailing in similar directions in relation to the wind, the windward vessel gives way to the leeward vessel.
Naval warfare In naval warfare during the
Age of Sail, a vessel always sought to use the wind to its advantage, maneuvering if possible to attack from windward. This was particularly important for less maneuverable
square-rigged warships, which had limited ability to sail upwind, and sought to "hold the
weather gage" entering battle. This was particularly important once
artillery was introduced to naval warfare. Ships heel away from the wind, so the leeward vessel would expose more of her
topsides to shot, in extreme cases even part of her bottom.
Describing islands The terms windward and leeward are used in reference both to sides (and climates) of individual islands and relative island locations in an
archipelago. The windward side of an island is subject to the
prevailing wind, and is thus the wetter (see
orographic precipitation). The leeward side is the side distant from or physically in the lee of the prevailing wind, and typically the drier. In an archipelago
windward islands are upwind and
leeward islands are downwind of the prevailing winds, such as the
trade winds of the Atlantic and Pacific oceans. ==See also==