How to Turn On and Off Rescue Mode on the DC50:
Press the Dog button twice on your Astro 320 to get to Dog List, select the collar you wish to change the rescue mode on.
Next select show info and this will bring up the info page.
Next hit the Menu button and select Rescue Mode.
Select On or Off, you will then get the communicating with dog unit page and finally the setting page, select OK and you have turned on or off rescue mode on your DC50!