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
exists and is an alternate of . The difference is that windward gets more rain, is wetter, and is the side of the mountain that is closest to the ocean. On the other hand the leeward is the farthest from shore and is drier but still gets rain.
The higher the mountain, the more pronounced the rain shadow effect is and the less likely rain will fall on the leeward side. The Windward is the side of a mountain that is facing into the direction that the wind is coming from. The Leeward side is the wind protected side of a mountain.