SPOT is a small, portable, multi-function device that; acts as a satellite emergency locator, provides real-time location tracking over the web (using Google Earth) to friends and family members, and allows you to send one way SMS text (or email) messages in areas where you can't get cellular or internet access.
As a pilot, you know what an ELT is, you've probably heard about the newer 406MHz PLB (Personal Locator Beacon), and you definitely know about cell phones. What if you combined all three and gave it almost worldwide satellite coverage? You would have the SPOT, the World's First Satellite Messenger and Tracker!