Garmin gpsmap 451s User Manual

Appendix 

waaS accuracy: 

Position: <10 ft. (3 m), 95% typical* 

Velocity: 0.05 m/sec steady state 

dynamics: 6 g

Power Source: 10–32 Vdc 

GPSMAP 421/421s  GPSMAP 451/451s 

GPSMAP 521/521s  GPSMAP 526/526s 

GPSMAP 551/551s  GPSMAP 556/556s

Power Source: 10–35 Vdc 

GPSMAP 420/420s  GPSMAP 450/450s 

GPSMAP 520/520s  GPSMAP 525/525s 

GPSMAP 550/550s  GPSMAP 555/555s

Usage: 15 W max at 13.8 Vdc
fuse: AGC/3AG - 3.0 A

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);  

Dual Beam, 400 W (RMS), 3,200 W (peak to peak)

frequency: 50/200 kHz (dual frequency and 1 kW), 80/200 kHz 

(dual beam)

depth: 2,500 ft. (762 m) (1 kW), 1,500 ft. (457 m) (dual frequency), 

 900 ft (274 m) (dual beam)**

 

*1 kW transducers are supported by the GPSMAP 525s/526s/

555s/556s units only.

 

**Depth capacity is dependent on water salinity, bottom type, 

and other water conditions.

The unit uses an on-screen message system to alert you to unit 

operating characteristics. When a message appears, press 

 to 

acknowledge the message.
accuracy alarm—the GPS accuracy has fallen outside of the user-

set value.
aiS: dangerous Target—shows the MMSI (Maritime Mobile 

Service Identity) of the dangerous target.
alarm Clock—the alarm clock has sounded.
anchor drag alarm—you have drifted out of the specified distance 

range.
antenna input is Shorted—a part of the antenna wiring is 

contacting the chassis.