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GPS Global Positioning Systems > GPS By Brand > Garmin > Obsolete Garmin Products

Garmin GPSMap 188 with external antenna (discontinued) Specifications  Plotter/Moving Map Features  Basemap: Built-in Worldwide Marine basemap to 32 nm. Data Cartridge: Preprogrammed micro cartridges containing detailed BlueChart® marine cartography MapSource®: Compatible with most Garmin® MapSource products including MapSource BlueChart marine cartography. Garmin data card required.    Navigation Features Waypoints/icons: 3000 with name, symbol and comments; support for proximity waypoints Routes: GPSMAP® 188: 50 reversible routes with up to 50 points each, plus MOB and TracBack® modes GPSMAP 188c: 50 reversible routes with up to 254 points each, plus MOB and TracBack modes Tracks: 3000 point automatic track log, 15 saved tracks; 500 points per saved track, lets you retrace your path in both directions Trip computer: Current speed, average speed, resettable max. speed, trip timer and trip distance Alarms: Anchor drag, arrival, off course, proximity waypoint and clock Tables: Built-in celestial tables with sun and moon rise, set, and location; tide tables for the U.S. Map datums: More than 100, plus user datum Position format: Lat/Lon, UTM/UPS, Loran TDs and other grids, including user grid    GPS Performance Receiver: differential capable, 12 parallel channel GPS receiver continuously tracks and uses up to 12 satellites to compute and update your position Acquisition times: Warm: Approximately 15 seconds Cold: Approximately 45 seconds AutoLocate®: Approximately 5 minutes Update rate: 1/second, continuous GPS accuracy: Position: < 15 meters, 95% typical* Velocity: 0.05 meter/sec steady state DGPS  accuracy: Position: 3-5 meters, 95% typical* Velocity: 0.05 meter/sec steady state Dynamics: 6 g's Interfaces: 2-RS232 with NMEA 0183, RTCM 104 DGPS data format and proprietary Garmin Antenna: GA 29 remote marine mount with 30' cable or bail mount antenna    Depth Sounder Features Frequency: 50/200 kHz (40'/10') Sonar power output: 500 watts (RMS), 4000 watts (peak to peak) Depth: 1500 foot max depth** See-Thru®¨ technology: Shows weak/strong returns simultaneously Depth control gain (DCG®¨): Automatically adjusts fishfinder sensitivity according to depth    Power   Source: 8-35v DC Usage: 8 watts max. at 13.8v DC    Physical Size: 6.3" W x 6.2" H x 2.6" D Weight: 1.7 lbs. (.77 kg) Display: GPSMAP 188 — 5.5" diagonal (14.0 cm) high-resolution, 10-level grayscale LCD with backlighting (240 x 360 pixels) GPSMAP 188C — 5.0" diagonal (12.7 cm) high-resolution, 16-color TFT with backlighting (234 x 320 pixels) Case: Fully gasketed, high-impact plastic alloy, waterproof to IEC 529 IPX7 standards Temperature range: 5°F to 158°F (-15°C to 70°C)