Here's one: https://www.dxengineering.com/parts/wmo-picoaprs https://www.dxengineering.com/parts/wmo-picoaprs You can buy similar in board form, popular among

Here's one: https://www.dxengineering.com/parts/wmo-picoaprs https://www.dxengineering.com/parts/wmo-picoaprs You can buy similar in board form, popular among the high altitude balloon communities. I use one on my dog's collar and my 2m radio will show me an arrow and distance to the dog. As a bonus I can call family/friend and have them check the world wide APRS map to see if the dog has gone near a repeater. It's also handy to check the weather, there's quite a few weather stations about and in the mountains the local forecast can be unreliable and a weather station that's MUCH closer than the nearest city can provide handy info on quickly changing weather conditions.