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OPERATING TIPS
General
Most equipment malfunctions can be prevented by observing the
following rules:
Turn the unit off before inserting or removing a power jack.
o
Do not leave the unit face up in the sun.
o
Do not operate the unit in temperatures above 60°C or below
o
-10°C.
Do not store the unit at temperatures above 70°C or below
o
-40°C.
o
If the unit is dropped in the water, use fresh water to carefully
rinse both the outside of the unit and the battery compartment.
Dry the unit and battery compartment thoroughly.
Unsure of Your Initialization Position
When you have no map to refer to and you don't know your initializa-
tion, press AUX 5. (Be sure you have a clear view of the sky.) The unit
searches the sky for any satellite and collects an Almanac from it. The
unit then locates additional satellites to calculate a position fix and
initialize itself. An initialized position entered in this way is sufficient to
operate the unit, but the unit will obtain its first position fix much faster
if it is initialized by manually entering the position.
You can use Waypoint Projection (AUX 8) to help project a new
position, based on where you were.
CHOOSING A DATUM
All charts are created using a system that includes the scale, type of
projection, and a map datum. There are hundreds of map datums in
use throughout the world, but only a few are in widespread use today.
The NAV 5000 has 11 map datums plus one user-entered datum. You
should set the unit to use the same datum as your charts and equip-
ment; a position in one datum can differ by 300 meters or more from
one calculated using another datum.
6-11
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