Garmin problem on last hunt, something to think about.

One thing we figured out to increase range significantly in one of those situations that your dog gets way out of range of the garmin. If you have an old telemetry antenna that is tuned the 155 frequency, a lot of the old ATS antennas run on 155. You can buy an adapter for it and hook it straight into your garmin astro. This has gotten us more range than anything else we've tried. Just keep one of the old antennas with an adapter on the cable in your truck or boat or whatever you hunt off of and in an emergency you can hook it up to your garmin and usually get the signal back so you will know which direction you need to go..
You can buy an adapter that will fit it at most electronic stores. I have no clue why someone has not already started selling a setup like this on the interent.