When I was still regularly duck hunting I used my Fujinon 7X50 Marine Binoculars Which were the binos I used when I was on my boat on the Chesapeake Bay. They have a built in compass which is handy on the water and are the clearest binoculars I have ever looked through. They are expensive, they were close to $800.00 back in the early 80s when I bought them. I still have them and they are as good now as when I bought them. Fir use in a boat they can't be beat, for carrying around on land they are heavy.