To send an SOS message
1. Press and slide the SOS button lock to the left.
2. Press and hold the SOS button until the SOS LED begins to flash and then release the button. The SOS LED flashes green once every three seconds. In addition, the Message LED flashes green once every three seconds while the message is being sent.
When the SOS and Message LEDs begin flashing green more rapidly (every 1.5 seconds), it indicates that your SOS message was received by an emergency responder and they are acknowledging your message.
To confirm that you know search and rescue has received your message, press and immediately release the SOS button. The SOS LED resumes flashing green every three seconds.
If you are unable to confirm that you know your message was received, help will still be sent.
To cancel an SOS message
1. Press and hold the SOS button until the SOS LED flashes rapidly and then release the button. This sends a message to search and rescue to let them know that the emergency has been resolved and assistance is no longer needed.
2. Press and slide the SOS button lock to the right.
When you cancel SOS, the SOS LED flashes rapidly and then stops. The Signal and Message LEDs flash until the cancellation message has finished sending.
IMPORTANT! You must cancel SOS to stop search and rescue from sending help. Turning off the inReach device or a connected device or taking out the batteries will NOT tell search and rescue to stop the rescue. If you replace the batteries when an SOS is in progress, press and hold the SOS button again to update your location
Information concerning SOS message charges can be found here: http://support.inreachcanada.com/kb/articles/53