Special Notes; Gps; Dgps; Charts And Navigational Aids - NorthStar MX500 Operator's & Installation Manual

Operator's Manual

Special Notes

GPS

Never rely solely on any single navigational aid. Always use what-
!
ever information is available, and cross-check information when pos-
sible. GPS expected position accuracy is dependent upon multipath
environment, number of satellites in view, baseline length (for local
services), ionospheric activity, and HDOP. The derived speed and
course readings may be hampered accordingly. The GPS system was
declared operational in 1994; however, the system's availability and
accuracy are subject to change at the discretion of the U.S. Depart-
ment of Defense.

DGPS

This GPS receiver's position accuracy is dependent upon ionospheric
!
activity, multipath, subject to the availability, accuracy, and control
of the DGPS correction transmission from the Beacon Station.
The beacon radio signal which carries the DGPS corrections may be
hampered by weather conditions such as heavy rain, snow, and thun-
der storms. The beacon radio signal may also be interrupted by pow-
erful radio transmitters operating in long wavelength bands.

Charts and Navigational Aids

Positions obtained from charts are not always as accurate as your
!
navigator (due to environmental changes, the dates of charts, and
datum offsets if the datum differs from the one in use by the naviga-
tor). The position of a floating aid can differ due to tide, set and drift.

Compass Safe Distance

> 1 meter
2
About GPS Navigation
Version 3.0