I had the garmin Etres 20 for a while. Used it 1 time and sold it to someone on here. There are some decent phone apps out there that can do the same basic thing but much cheaper. I had a cool one that i deleted, I think it was memory map or something like that. I also use BoatUs for insruance, they have an app that i have where i can call for a water tow and they know my location using my phone.