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.
Windward and leeward are words used to describe directions based on how the wind is blowing. If you are standing in a windy place, and you face so that the wind is blowing straight into your face, you are facing windward. If you stand so that the wind is blowing onto your back, you are facing leeward.