The current terrainIntersectXXX commands return the intersection with the water surface.
This might be undesirable. Not to mention incorrect, because water is not "terrain". It's "ground" (consider ATL vs AGL positions)

So having a third optional parameter for these commands would be appreciated. e.g:

terrainIntersectAtASL [pos1, pos2,  returnWater (optional, default: true)];

(this is the only command I care about, and the most "comprehensive" one; you can just implement it for this one)