Magellan NAV 5000, User Manual

Page: 138 / 153

APPENDIX 3
GEOMETRIC QUALITY
Geometric quality (GO) is a measure of position accuracy. lt is dis-
played on the third screen of any position fix and any fix saved as a
waypoint.
Geometric quality (GO) is based on a measurement of the geometry of
the satellites used for triangulating a position. In general, the farther
apart the satellites are, the more accurate the fix is. The position fix
may not be as accurate when the satellites are close together.
When geometric quality is between 4 and 9 the position fix is reliable
and can safely be used to navigate. When geometric quality is from 0
to 3 the fix is unreliable, and should not be used to navigate with.
Position fixes with a GO of 0 to 3 are displayed with a warning symbol
in the lower right corner of the display.
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