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GPSMAP 400/500 Series Owner’s Manual 67
Appendix
Acquisition Times: (Average acquisition times for a stationary
receiver with a clear view of the sky)
GPSMAP 421/421s GPSMAP 451/451s
GPSMAP 521/521s GPSMAP 551/551s
Warm*: Approximately 1 second
Cold**: Approximately 38 seconds
GPSMAP 526/526s GPSMAP 556/556s
Warm*: Approximately 15 seconds
Cold**: Approximately 45 seconds
*Warm:
your unit is at or near the last location where you
recently acquired satellites.
**Cold: your unit has moved by more than about 500 mi. (800
km) since it was turned off.
Update Rate: once per second
GPS Accuracy:
Position: <49 ft. (15 m), 95% typical
Velocity: 0.164 ft./sec 0.05 m/sec steady state
WAAS Accuracy:
Position: <10 ft. (3 m), 95% typical
Velocity: 0.05 m/sec steady state
Dynamics: 6 g
Power
Power Source: 10–32 Vdc
Usage: 15 W max at 13.8 Vdc
Fuse:
AGC/3AG - 3.0 A
Sonar
Power: 1 kW Transducer, 1,000 W (RMS),
8,000 W (peak to peak)*;
Dual Frequency, 500 W (RMS), 4,000 W (peak to peak)
Frequency:
50/200 kHz (dual frequency and 1 kW)
Depth:
2,500 ft. (762 m) (1 kW), 1,500 ft. (457 m)**
*1 kW transducers are supported by the GPSMAP 526s and
556s units only.
**Depth capacity is dependent on water salinity, bottom type,
and other water conditions.