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Garmin GPSMAP 178C Sounder Specifications
Case Plastic Alloy
Unit Dimensions 6.3" x 4.9" x 3.7" (W x H x D)
Display Type 256-Color CSTN
Display Viewing Area 3.2" W x 3.2" H (4.5" diagonal)
Display Resolution 320 x 320 pixels
Backlight Adjustable CCFL
Processor 200MHz
Transducer Frequencies 200kHz Single, 50/200kHz Dual
Transmit Power (Dual-frequency transducer) 500Watts (RMS) 4000Watts (PTP) output
Transmit Power (Single-frequency transducer) 400Watts (RMS) 3200Watts (PTP) output
Receiver 12 parallel channel
Waypoints/icons 3000 waypoints, 10 nearest, 10 proximity
Routers 50 reversible routes with up to 50 points each, plus MOB and TracBack® modes
Antenna Internal/External available
Alarms Anchor drag, arrival, off-course, proximity waypoint, and clock
Maps Basemap, uploadable maps
Power source 12V DC, 1.2 Amperes (10-35 V range)