The best distance-to-line tool ever, plus windshift management and a compass.Before Velocitek, you needed a $10,000 laptop-based system to get accurate distance-to-line measurements. Now, with ProStart, setting the line is as simple as telling your crew to press the Boat button as you sail by the RC and then the Pin button as you sail by the pin. Once youve pinged” both ends of the line, ProStart uses WAAS-augmented GPS technology to spit out an accurate distance to line measurement every half-second.Key FeaturesTime and Distance: The ProStart has revolutionized how competitive sailors start races. As well as providing a simple way to measure distance-to-line, the ProStart shows speed and course over ground in a compact, distraction-free, easy-to-use instrumentBest Starting Line Tool Ever: The ProStart is specifically designed from the ground up to give you the easiest, most accurate distance to line measurements ever"Ping" The Ends of the Line: Setting the line is as simple as telling your crew to press the boat button as you sail by the RC and then the pin button as you sail by the pinGPS Accurate: Once youve pinged both ends of the line, the ProStart uses the latest WAAS-augmented GPS technology to spit out an accurate distance to line measurement twice a secondKudos From the Experts: Sailing World called the ProStart "Possibly the greatest electronic racing gadget of this decade,” and Practical Sailor gave it their prestigious Editor's Choice awardSpecificationsAccuracy: Distance to Line Accuracy: ±1.5 meters; Speed Accuracy: ±0.2 Knots; Heading Resolution: 1.0 Digit Size: 1.2" digit height; 120 viewing cone Display Modes: Start Mode: timer & distance/Race Mode: speed & heading Data Logger: Lat, Long, Time, Speed, and Heading recorded at 0.5Hz (once every 2 sec.), 30hr. capacity. Data download compatible with Mac OS X 10.6 and Windows Batteries: Three AA batteries Battery Life: Over 20 hours Mounting: ProStart Mast Bracket or any Tacktick Micro Compass bracket Dimensions: 4