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GPSMAP 400/500 Series Owner’s Manual 
55
Appendix 
Appendix
Specifications
Physical Specifications
Size :  400 Series: W × H × D: 5.7 in. × 5.0 in. × 3.0 in. 
 
(14.5 cm × 12.7 cm × 7.6 cm) 
 
500 Series: W × H × D: 5.9 in. × 6.4 in. × 2.9 in. 
 
(15.0 cm × 16.3 cm × 7.4 cm)
weight:  400 Series: 1.30 lb. (560 g) 
 
500 Series: 1.75 lb. (800 g)
display:  gPSMaP 420/421/450/451: 4.0 in. diagonal (10.6 cm), 
QVGA display with adjustable brightness, 320 × 240 pixels.
 
gPSMaP 520/521/550/551: 5.0 in. diagonal (12.7 cm), QVGA  
display with adjustable brightness, 320 × 234 pixels.
 
gPSMaP 525/526/555/556: 5.0 in. diagonal (12.7 cm), Full 
VGA display with adjustable brightness, 640 × 480 pixels, 
capable of 4,096 colors. 
Case:  Fully gasketed, high-impact plastic alloy, waterproof to  
 
IEC 529 IPX7 standards.
Temp. Range: From 5ºF to 131ºF (from -15ºC to 55ºC)
Compass-Safe distances:
Model Number
Compass-Safe 
Distance
GPSMAP 526/556
20 in. (50 cm)
GPSMAP 421/451
26 in. (65) cm
GPSMAP 521/551
30 in. (75 cm)
GPSMAP 420/450/520/550/525/555
38 in. (95 cm)
Performance
Receiver:
Differential-ready 12 parallel channel WAAS-capable receiver:
 
GPSMAP 420/420s  GPSMAP 450/450s 
GPSMAP 520/520s  GPSMAP 525/525s 
GPSMAP 550/550s  GPSMAP 555/555s
High-sensitivity, 14 parallel channel, WAAS-capable receiver:
 
GPSMAP 421/421s  GPSMAP 451/451s 
GPSMAP 521/521s  GPSMAP 551/551s
High-sensitivity, 12 parallel channel, WAAS-capable receiver:
 
GPSMAP 526/526s  GPSMAP 556/556s