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 windward side of the boat is the side of the boat that the wind is hitting. the other side of the boat that is sheltered from the wind is the Leeward side. In other words â¦... the windward side of the boat is the side that is closest to the source of the wind.