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
Theyâre called the Windward Islands because theyâre exposed to the wind (âwindwardâ) of the northeast trade winds (northeasterlies). Windward and Leeward Islands of the Lesser Antilles The Windward Islands include. The Leeward Islands are the northwestern islands of the Lesser Antilles. Theyâre called the Leeward Islands because theyâre away from the wind (âleeâ).
Keel - The spine of a ship that runs from bow to stern at the lowest point. Lee (Leeward) - Direction the wind is blowing relative to the ship. The side of the ship opposite that of which the wind is coming from is known as the Lee side. Lighthouse - A tower used as an aid to navigation marking a hazard or point of entrance. Usually consisting of a very bright light atop a tower and often a foghorn or siren and radio beacon.