The GT-31 tracks 12 satellites every second. Garmin GPS units track only 3 or 4 satellites every 2 seconds. Additional trackpoints and the Doppler positional mesasurement result in more precision. The differences between the 1 and 2 second trackpoint intervals can be seen in the following GPS Trackpoint Comparison.
LOCOSYS works with GPS Experts from Australia, England, USA, France, Germany, and Holland to make this the best possible GPS for Speed Sailing!!!
GT-31/BGT-31 Downloads: Here
GT-11/BGT-11 Downloads: Here
Hikers, and Snow Skiers should consider the Custom Fitted Elastic Armstrap.
This GPS is great for Bicycling when used with the optional Bicycle Handlebar Mounting Kit.