This has happened to our group several times. Luckily, we have the 530, with the polling option, which has allowed us to locate them everytime. If there is still power left in the battery and the unit is on, and someone you know with a Rino 530 has your contact on their radio, you can go to the general area where you think it is and "Poll Location" and it will update automatically, just as if you were to press the talk button. As far as I know this is only a feature with the 530 and possibly the 520. Good Luck, hope you get it back.
