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8-8
To change the pre-defined datum...
· Highlight the “Change?” field and press ENT.
· With the arrow keys, find the desired datum and highlight it.
· Press ENT. The new datum is selected.
The user-defined datum option allows
you to custom-tailor a datum reference
from which all position coordinates are
calculated. All entries are defined as
differences from the WGS 84 standard
datum. (CAUTION: Selection and
use of the user datum function is for
individuals experienced in the use of
map datums. If the pre-defined map datums do not correspond to the chart
you are using and you are unsure of the correct entries required to
correspond to that chart, contact the chart manufacturer. Incorrect entries
for a user-defined datum may result in substantial position errors.)
To define a user datum...
· Place the cursor over the cyclic field on line one.
· Press CLR to select “User-defined”.
· Enter the 5 parameters of the user map datum. The sign of the
parameters should follow the convention: WGS 84 - local geodetic
system.
8.8 AUDIO AND DISPLAY SETUP (SETUPS)
From the Audio/Display Page you can
turn the message and/or keypad tones
on and off, change the display contrast
and change the time-out for the display
backlighting.
The tone option allows you to turn the
GPS 95's audio tone on or off as
desired. You may turn the keypad
feedback tone off, but leave the message tone on; have both tones on; or
have both tones off.