HOLDING THE WEATHER

[Cmmdre]

Holding the weather, or windward, gage conferred several important tactical advantages. The admiral holding the weather gage held the tactical initiative, able to accept battle by bearing down on his opponent or to refuse it, by remaining upwind. The fleet with the lee gage could avoid battle by withdrawing to leeward, but could not force action. Even retreating downwind could be difficult once two fleets were at close quarters because the ships risked being raked as they turned downwind. A second disadvantage of the leeward gage was that in anything more than a light wind, a sailing ship that is sailing close hauled (or beating) will heel to leeward under the pressure of the wind on its sails. The ships of a fleet on the leeward gage heel away from their opponents, exposing part of their bottoms to shot. If a ship is penetrated in an area of the hull that is normally under water, she is then in danger of taking on water or even sinking when on the other tack. This is known as "hulled between wind and water". Finally, smoke from the gunfire of the ships to windward would blow down on the fleet on the leeward gage. So it was common for battles to involve days of maneuvering as one admiral strove to take the weather gage from his opponent in order to force him to action, as at the battles of Ushant (1778), St Lucia Channel (1780) and the First of June (1794).
Only in heavy weather could the windward gage become a disadvantage, because the lower gun ports on the leeward side of a ship would be awash, preventing her from opening her lower-deck ports to use the guns – or risking being swamped if she did. So, in strong winds, a ship attacking from windward would not be able to bring her heavy lower-deck guns into action, while the enemy ship to leeward would have no such problem as the guns on her windward side would be raised by the heel. For this reason, Admiral Rodney ordered his ships to attack the Spanish from leeward in the stormy weather at the Battle of Cape St. Vincent in 1780.

Also see.
http://www.sailsofglory.org/showthre...SAILING-BASICS