ER stands for Extended Range These aircraft types that is identified by 'ER' are aircraft models that is enhanced for better efficiency at long range flights than its counterpart aircraft of the same model. Source(s): Aerospace Engineer - Aviation Enthusiast
Actually Dusty.... The leeward side extends all the way to Koko Head (encompasssing Pearl Harbor, Honolulu to Hawaii Kai). By definition. Windward is the side of an island where the predominant wind travels from the sea onto the island. Leeward is the side of an island where the predominant wind travels from the interior of the island to the sea. In practice on Oahu.
Windward Islands. Windward Islands, southern group of the Lesser Antilles in the West Indies, curving generally southward for c.300 mi (480 km) from the Leeward Islands toward NE Venezuela.xcluding Barbados and Trinidad and Tobago, which are in the region but are not part of the group, the Windward Islands consist of the French overseas dept. of Martinique and the former British Windward Islands (c.700 sq mi/1,810 sq km).