Originally Posted by maxhar
sit in the console and output the Lat/Long to the radio in case I need to hit the red button.
Better still outside the console so it can see the satellites!
As said above, all bar the cheeeeepest Garmins do that, and also give you a few toys on the side (e.g Speedo). A GPS12 will set you back pennies, and will last for ages on a set of duracells. It's got no WAAS, but out in the rib with a clear view of the sky it's usually showing a predicted boat length or so of error. There are leads to bare wire ends, which saves you messing about cutting plugs off.
The Etrexes are about 1/4 the size & do the same thing. With one of them you can also use it if you are out in the hills or whatever.