Title: Good Binoculars but Not for Navigation
Review: The name "mariner" in the product title would suggest that these binoculars are suitable for marine navigation, especially since they have an integrated digital compass. However, I knew I was in for trouble when I opened the box and read the instruction manual, which listed the accuracy of the compass at plus/minus 5 deg. An error of 5 deg. in marine coastal navigation could place you miles off course, and after comparing the binoculars to a hand-bearing compass and a GPS, I found that the error was actually closer to 7 deg. So, if you want a pretty good pair of binoculars with a novelty compass for fun, then these would be fine for you. If you plan to use them for navigation purposes, they are unusable.
Is this product review negative?