No, you may not send a Check In OK message while tracking. In order to emit a Check In OK after having activated Tracking, please turn off the SPOT unit by pressing and holding the ON/OFF button for 3 seconds. Then power the unit back on by pressing the ON/OFF button and quickly pressing the OK button until the LED blinks red.
Additional information about priority of messages:
Common Issues
My tracks did not go through while using more than one function.