| The GPSMAP 235 Sounder features dual-frequency operation that provides a clear image in both deep and shallow water—1,200 feet in saltwater and freshwater—all from one transducer. GARMIN's exclusive See-Thru™ technology lets the GPSMAP 235 Sounder hear both weak and strong signals at the same time, giving it tremendous dynamic range. The result is a 4-level grayscale display that shows strong fish returns even when fish are inside structure and thermoclines. Over 25 square inches of active viewing area gives you sizable detail coverage. The backlit screen measures an impressive 7.25" diagonally, yet the unit itself is slim enough—a mere 2.57" deep—for discreet and easy bulkhead flush mounting. A variable zoom window allows you to view increased detail at the touch of a button. You can even mark underwater waypoints to capture the position and depth of objects like reefs, dropoffs, or hazards and permanently store them for future use. -Receiver: Differential-ready 12 parallel channel receiver tracks all satellites in view -Frequency: 50 and 200KHz -Transmit Power: 500 W RMS (400 W peak to peak)GPS Acquisition Times: Warm: approx. 15 seconds, Cold: approx. 45 seconds -Autolocate™: approx. 5 minutes -GPS Update Rate: 1/second, continuous -Accuracy: 1-5 meters (3-15 feet) with DGPS. RMS 1-5 meters (3-15 feet) RMS with GARMIN GBR 21 DGPS receiver(optional) -Velocity: 0.1 knot RMS steady state -Dynamics: 6g's -Interfaces: NMEA 0180, 0182, 0183 and RTCM 104 DGPS corrections -Antenna: GA 28 remote marine mount with 30' cable -Display Options: Auto Bottom Tracking, Auto Ranging, 4 Zoom Levels, Split Screen Feature, and 3-level Fish ID -Alarms: Fish and Shallow/Deep Water - Size: 7.5 H x 7.7 W x 2.6 D inches (19.1 x 19.6 x 6.6 cm) - Weight: Less than 2.0 lb (908 g) -Display: 7.25" diagonal (18.4 cm) high-contrast, 4-gray LCD w/ backlighting (160 x 240 pixels -Case: Fully gasketed, high-impact plastic alloy -Temp. Range: 5°F to 158°F (-15°C to 70°C) - GARMIN detailed basemap: Built-in worldwide to 64 nm (32 nm U.S.) with coastlines, rivers, lakes, political boundaries, plus major cities and highways -Data Cartridges: G-chart™ cartridges with inland water and Navionics offshore cartography for seamless, detailed mapping and worldwide coverage (optional) -Plotting Scales: 1/8 to 4096 nm with dedicated push-button zoom control - Source: 10-40 VDC -Usage: 15 watts (max.) -Waypoints: Total: 250 alphanumeric, Nearest: 9(automatic), Proximity: 9(definable) - Routes: 20 reversible routes with up to 30 waypoints each,plus MOB and TracBack™ modes -Track Log: Approx. 2,000 points -Map Datums: 106 -Coordinates: Lat/Lon, UTM/UPS, plus 7 grids, including Maidenhead
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