As a former part-time land surveyor, I think binoculars with built-in compasses are a great idea. The ability to pick out a distant mark (especially in low light) and take an immediate bearing is great. The ones with the built-in reticule for estimating distance off are even better. I thought this would be useful to have on the water, so I went to check out a pair. Here's what I found:1) on most binocs, the compass wasn't easy to see so taking bearings wasn't easy2) the reticule was vertical only near the middle of the "eye-spacing" range. If your head is smaller or larger than average (eyes closer or farther apart) the reticule isn't vertical, so the distance measurement becomes difficult.Is it just me (my eyes are pretty far apart...if you catch my drift) or are these binoculars really not what they should be? Thanks in advance.PeterH23 "Raven"