I'm getting ready to install a Gaffrig GPS speedometer in my 22 Donzi, has anyone installed the antenna under the deck?

I really don't want to install this on the exterior if I can avoid it.

thanks,
Gregg

It needs to have a clear shot at the sky if possible. I have mine center dash looking up thru the center section of windshield.

Plenty of installs under the deck work just fine. If you have a flat surface under the deck somewhere, hopefully not near the compass, try it there first.

have mine wire tied under the dash seems to work just fine

Under the deck for 11 years , never a problem . The new type that are hard wired to your 12v system seem to be more potent than the old battery powered antenna's .

I had one under the deck on my last boat, no problem. Currently, my GPS antenna is under the deck too.