Magellan NAV 6500 User Manual page 19

Satellite Quality
Bar Graph
The current time, date, GPS status, geometric quality
(HDOP) and estimated position error (EPE) are also dis-
played. When the unit is first turned on, or when the posi-
tion fix is more than 20 seconds old, the GPS status field will
indicate "Acquiring," the HDOP and EPE numbers are re-
placed by underscores and the available softkeys are Aux,
Waypts, Routes, Init Pos, and Nxt Scrn.
Init Pos can be used to initialize the unit (see Entering an
Approximate Initial Position).
If the receiver is computing fixes and moving faster than 0.2
mph, a line from the center to the outer circle points in the
Magellan NAV 6500/NAV 6510
GPS Fix
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8
7
6
5
4
29
3
2
1
01 14 15 20 21 22 25 29 -- --
HDOP:
Aux Waypts Routes MapShft NxtScrn
True North
Jan/19/96
09:19:05AM
Satellite Position
(not tracking)
Satellite Position
20
(tracking)
01
14
Direction of
25 COG
15
Geometric Quality
22
Estimated Position
Error
1.1 EPE: 63.1Ft
direction of COG. The direction of the line is updated when-
ever COG changes.
When the unit is computing fixes the GPS status field will
indicate "GPS Fix" and the active softkeys at the bottom of
the Satellite Status screen are Aux, Waypts, Routes, Map Shft
and Nxt Scrn.
If the boat's position plotted on the map screen is
consistently offset from the coordinates plotted on
the paper chart, a bias may exist in the paper chart
due to the datum used. You can use Map Shift to
apply an offset to the boat's position to correct for
the bias. See the section entitled Map Shift.
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