Appendix; Specifications - Garmin GPSMAP 420 Owner's Manual

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Specifications

Physical Specifications
Size:
5" H x 5.7" W x 3" D (12.7 cm x 14.5 cm x 7.62 cm)
Weight: 1.30 lbs (560.0 g)
Display: 4.0" diagonal (10.16 cm), QVGA display with adjustable
brightness, 320 x 240 pixels.
Case:
Fully gasketed, high-impact plastic alloy, waterproof to
IEC 529 IPX7 standards.
Temp. Range: 5ºF to 131ºF (-15ºC to 55º C)
Compass Safe Distance: 95 cm
Performance
Receiver: Differential-ready 12-parallel channel WAAS-capable receiver
Acquisition Times:
Warm: Approx. 15 seconds
Cold: Approx 45 seconds
AutoLocate: Approx 2 minutes
Update Rate: 1/second, continuous
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GPS Accuracy:
Position: <49 feet (15 meters), 95% typical*
Velocity: 0.05 meters/sec steady state
WAAS Accuracy:
Position: <10 feet (3 meters), 95% typical*
Velocity: 0.05 meters/sec steady rate
Dynamics: 6gs
* Subject to accuracy degradation to 100 m 2DRMS under the U.S. DOD-imposed Selective
Availability Program.
Power
Power Source: 10-35 VDC
Usage: 15 Watts max at 13.8 VDC
Fuse: AGC/3AG - 3.0 Amp
Sonar
Power: Dual Frequency, 500 Watts (RMS), 4,000 Watts (peak to peak);
Dual Beam, 400 Watts (RMS), 3,200 Watts (peak to peak)
Frequency: 50/200 kHz (dual frequency), 80/200 kHz (dual beam)
Depth: 1,500 ft (dual frequency), 900 ft (dual beam)*
*Depth capacity is dependent on water salinity, bottom type, and other water conditions.
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