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APPENDIX C
Specifications &
Wiring
58
PHYSICAL
Case: waterproof*
Size: 6.15”H x 2”W x 1.23”D (15.6 x 5.1 x 1.23 cm)
Weight: Approx 9.5 ounces (269g) w/ batteries
Temperature Range: 5º to 158ºF (-15º to 70ºC)
PERFORMANCE
Receiver: Differential-ready MultiTrac8
TM
Acquisition Time: Approx. 20 seconds (warm start)
Approx. 2 minutes (cold start)
Approx. 7.5 minutes (AutoLocateTM)
Update Rate: 1/second, continuous
Position Accuracy: 5-10 meters (16-33 ft.) with DGPS corrections**
15 meters (49 ft.) RMS***
Velocity Accuracy: 0.1 knot RMSsteady state (93 knots/103 mph max.)
Dynamics: Performs to specification to 3g’s
POWER
Input: Four 1.5 volt AA batteries or 5-8 vDC
Power: .75 watts
Battery Life: Up to 12 hours (normal mode)
(w/ alk. batt.) Up to 20 hours (battery saver mode)
NOTE: Alkaline batteries lose a significant amount of their capacity as temperature decreases. If
you’re using the GPS 38 in below freezing temperatures, use lithium batteries for longer
battery life. Extensive use of screen backlighting will significantly reduce battery life.
Specifications subject to change without notice.
* Meets IEC (European Community Specification) 529 IPX7 for protection against immersion for 30 min-
utes at a depth of 1 meter.
** With optional GARMINGBR 21 Beacon Receiver Input.
*** Subject to accuracy degradation to 100m 2DRMS under the US DOD-imposed Selective Availability
Program.
The GPS 38 is constructed of high quality materials and should
not require user maintenance. Should your unit ever need repair,
please take it to an authorized GARMIN service center. The GPS
38 has no user-serviceable parts. Never attempt any repairs your-
self. To protect your GPS, keep it covered or in a carrying case
(optional) when not in use, and never allow gasoline or other sol-
vents to come into contact with the case. Clean the case and lens
with a soft cloth and a household window cleaner.
GPS 38 Man Rev B 7/23/98 4:34 PM Page 58