Tracking on the inReach Original can be activated by holding down the tracking button until the tracking LED begins to flash. The tracking LED will continue to flash until it is turned off.This will set the tracking interval to every 10 minutes, this interval cannot be adjusted. 

To turn off tracking hold down the tracking button until the LED stops flashing.

If you are looking for more tracking interval options, you will want to pair your inReach device with an Apple iOS or Android device and download the Earthmate app.

Earthmate app for Apple iOS: http://support.inreachcanada.com/kb/articles/10-pairing-inreach-original-to-iphone-ipad-ipod

Earthmate app for Android: http://support.inreachcanada.com/kb/articles/11-pairing-inreach-original-to-android