The Garmin GPS 73 delivers professional-grade navigation for serious mariners. Its high-sensitivity GPS receiver rapidly acquires satellite signals, even in challenging conditions below deck, and stores up to 1,000 waypoints and 100 tracks for reliable route planning. SailAssist technology provides virtual starting lines, countdown timers, heading lines, and tack assistance—essential tools for competitive sailing. Fully waterproof (IPX7) and buoyant, this device withstands marine environments. The 3.6 x 5.4 cm high-contrast LCD display remains legible in all lighting, whilst dedicated back-lit buttons enable intuitive operation. NMEA 0183 compatibility allows seamless data transfer via USB. Built-in celestial data covers sunrise/sunset times, fishing calendars, ETA calculations, and marine metrics. Powered by two AA batteries with 18+ hours runtime, the GPS 73 combines durability, precision, and functionality for demanding water-based applications.