Page 64 951/952 Operator’s Manual Rev. B
Chapter 5 - Determining Position Coordinates
Press the menu key to return to the GPS POSITION
screen.
Using DGPS
When operating the 951XD or 952XD with DGPS in use, you’ll
usually see position measurements accurate to about one to
three meters, speed measurements accurate to about 0.1 knot,
and COG measurements accurate to about 0.5 degree. DGPS
corrections remove the errors caused by atmospheric varia-
tions.
NOTE:
When you’re using DGPS as your navigation source, your position coordi-
nates, as calculated by the unit, may actually exceed the accuracy of
some charts.
When the DGPS indicator is displayed, it means the unit is
using this higher level of accuracy. On the GPS POSITION,
STEERING, and 3D STEER screens, the DGPS indicator is a large
letter “D” in the upper right corner. On the CHART screen, the
DGPS indicator is the word DGPS. When you require this addi-
tional accuracy, be sure to check often to see that these indica-
tors are present.
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