Someone under the water has total cover from someone on the land. If you are in the water but not under it you have partial cover from a land based opponent. What I'd like to know is if you are in ...
Degrees of cover and concealment are defined in the Player's Handbook (pp 280-281). There it discusses cover, superior cover, concealment, and total concealment. However, many powers and features ...
As the RC and DMB say, an enemy behind an obstacle has either partial or superior cover. The example often used is that of a creature fighting behind a portcullis or window (e.g. in DMB page 141). The ...