To test the transom mount transducer installation:
1. Begin testing the installation at a slow speed. If the sonar appears to be working properly, gradually increase the speed of the boat while
observing the operation of the sonar. If the sonar signal suddenly is lost or the bottom return is severely degraded, note the speed at which
this occurs.
2. Return the boat to the speed at which the signal was lost. Make moderate turns in both directions to see if the signal improves.
3. If the signal strength improves while turning, adjust the transducer so that it extends another
take several adjustments to eliminate the degradation.
4. If the signal does not improve, you might have to move the transducer to a different location.
cAutIoN: When adjusting the depth of the transducer, make the adjustments in small increments. Placing the transducer too deep can adversely affect
the performance of the boat and put the transducer at greater risk of striking underwater objects.
Specifications
Physical Specifications
Size :
400 Series: W × H × D: 5.7 × 5.0 . × 3.0 in.
(14.5 × 12.7 × 7.6 cm)
500 Series: W × H × D: 5.9 × 6.4 × 2.9 in.
(15.0 × 16.3 × 7.4 cm)
Weight: 400 Series: 1.30 lb. (560 g)
500 Series: 1.75 lb. (800 g)
Display: GPSMAP 420/421/430/431/440/441/450/451 (s): 4.0 in.
diagonal (10.6 cm), QVGA display with adjustable brightness,
320 × 240 pixels.
GPSMAP 520/521/530/531/540/541/550/551 (s): 5.0 in.
diagonal (12.7 cm), QVGA display with adjustable brightness,
320 × 234 pixels.
GPSMAP 525/526/535/536/545/546/555/556 (s): 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
GPSMAP 526/536/546/556
GPSMAP 421/431/441/451
GPSMAP 521/531/541/551
GPSMAP 420/430/440/450
GPSMAP 520/530/540/550/525/535/545/555
Performance
Receiver:
GPSMAP 420/430/440/450 (s)
GPSMAP 520/530/540/550/525/535/545/555 (s):
Differential-ready 12 parallel channel WAAS-capable receiver
GPSMAP 421/431/441/451 (s)
GPSMAP 521/531/541/551 (s):
High-sensitivity 14 parallel channel WAAS-capable receiver.
GPSMAP 526/536/546/556 (s):
High-sensitivity 12 parallel channel WAAS-capable receiver.
10
Acquisition times: (Average acquisition times for a stationary
update Rate: 1/second, continuous
GPS Accuracy:
WAAS Accuracy:
Compass-Safe
Distance
Power
20 in. (50 cm)
Power Source: 10–32 Vdc
26 in. (65) cm
30 in. (75 cm)
38 in. (95 cm)
Power Source: 10–35 Vdc
usage: 15 W max at 13.8 Vdc
Fuse: AGC/3AG - 3.0 A
/
in. below the transom of the boat. It might
1
8
receiver with a clear view of the sky.)
GPSMAP 420/430/440/450 (s)
GPSMAP 520/530/540/550/525/535/545/555 (s):
Warm*: Approximately 15 seconds
Cold**: Approximately 45 seconds
GPSMAP 421/431/441/451 (s)
GPSMAP 521/526/531/536/541/546/551/556 (s):
Warm*: Approximately 1 second
Cold**: Approximately 38 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.
Position: <49 ft. (15 m), 95% typical
Velocity: 0.164 ft./sec 0.05 m/sec steady state
Position: <10 ft. (3 m), 95% typical
Velocity: 0.05 m/sec steady state
Dynamics: 6 g
GPSMAP 421/431/441/451 (s)
GPSMAP 521/531/541/551/526/536/546/556 (s)
GPSMAP 420/430/440/450 (s)
GPSMAP 520/530/540/550/525/535/545/555 (s)
GPSMAP 400/500 Series Installation Instructions
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