Specifications
& Wiring
APPENDIX B
52
Never attempt any repairs yourself. To protect your GPS 12,
keep it in a covered container or case when not in use, and
never allow gasoline or other solvents to come into contact with
the case. Clean the case and lens with a soft cloth and a house-
hold window cleaner.
PHYSICAL
Case: waterproof*
Size: 14.6 x 5.1 x 3.4 cm
Weight: Approx 9.5 ounces (269g) w/ batteries
Temperature Range: 5º to 158ºF (-15º to 70ºC)
PERFORMANCE
Receiver: 12 parallel channel, differential-ready
Acquisition Time: Approx. 15 seconds (warm start)
Approx. 45 seconds (cold start)
Approx. 5 minutes (AutoLocate
TM
)
Update Rate: 1/second, continuous
Position Accuracy: 1-5 meters (3-17 ft.) with DGPS corrections**
15 meters (49 ft.) RMS***
Velocity Accuracy: 0.1 knot RMS steady state
Dynamics: 6g
POWER
Input: Four 1.5 volt AA batteries or 5-8 vDC
Power Consumption: 1 watt
Battery Life: Up to 24 hours (with 4 AA batteries)
Internal Backup: lithium battery
NOTE: Alkaline batteries lose a significant amount of their capacity as temperature decreas-
es. If you’re using the GPS 12 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 minutes at a depth of 1 meter.
** With optional DGPS input.
*** Subject to accuracy degradation to 100m 2DRMS under the US DOD-imposed Selective
Availability Program.
GPS12B 1/13/99 4:29 PM Page 52
