I have a Garmin Dakota 20. I have read through the manual, but still need to re read as I had work calls and significant other interruptions the entire way through ;).
However when using Garmin Basecamp, it said coordinates are invalid. I wasn't sure that when I input them if I need to seperate the digits, change the order of the e/n'ing etc. I played with it for a minute, but mohawk lake isn't in Iraq, or it would be a LONG walk from the trailhead !