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Specications
Physical Specications
Size: 5.7" W x 3.2" H x 1.9" D
(14.5 x 8.1 x 4.8 cm)
Weight: 14.0 oz (0.40 kg)
Display: 3.75" diagonal (9.5 cm) Transective, 256-color
display with backlighting (480 x 320 pixels)
Case: Fully gasketed, high-impact plastic alloy,
waterproof to IEC 60529 IPX7
Temp. Range: 5°F to 140°F (-15°C to 60°C)
Power
Battery: Rechargeable lithium-ion
Battery Life: 4 to 15 hours depending on the backlight setting
and if you are using XM WX Weather or
XM Radio the entire time.
Source: 11–35 VDC
Fuse: 3AG - 1.5 Amp
Performance
Receiver: Differential-ready 12 parallel channel receiver
Acquisition Times: Approximately 15 seconds (warm start)
Approximately 45 seconds (cold start)
Approximately 5 minutes (First Time/
AutoLocate™)
Update Rate: 1/second, continuous
Accuracy
GPS: 15 meters (49 feet) RMS 95% typical
DGPS (USCG): 3–5 meters (10–16 ft), 95% typical
DGPS (WAAS): < 3 meters (10 ft) 95% typical with DGPS
corrections
Velocity: 0.1 knot RMS steady state
Dynamics: 6 g's
GPSMAP 378/478 Owner’s Manual 115
APPendIX > sPecIfIcAtIons