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4.3 Replacing The Battery
Both the
NAV
398
and the
RAYSTAR
108
GPS
sensor units contain internal
memories to store your position and other set-up information. A lithium
back-up battery keeps this memory information intact even when the units
are disconnected from the ship’s battery.
The estimated life span of the internal memory battery is from three to five
years. If a battery should fail, the memory contents will be lost.
While both the
NAV
398
and
RAYSTAR
108
GPS sensor can be operated
without their batteries, the 298 would not retain its
waypoint
memory, and
the
RAYSTAR
108
would require a time consuming cold start-up each time
you use the units. This would be extremely inconvenient. To insure trouble-
free
operation, it is recommended that the battery be replaced every three
years with an exact replacement lithium battery by your Authorized
Raytheon dealer or by the Raytheon Factory Service Center.
4.4 Master Reset
The NAV 398 unit is a microprocessor based equipment, and like most
computers, it runs smoothly and efficiently in normal use. However, under
extremely rare conditions, (for example: during very low and intermittent
DC input power conditions, such as while starting engines) the unit could
“hang up” or “freeze”. If this condition should occur, re-boot the
NAV 398
with a Master Reset when the DC power condition has been normalized.
There are two types of Master Resets available:
l
Hard Reset
-
Clears all
waypoint
memories and resets the unit to the
default settings.
l
Soft Reset
-
Only resets the default settings, but does not effect the
waypoint memories.
Typical Default Settings:
Latitude Direction = North
Magnetic Variation = On
Averaging L/L = Med
Display Mode =
"NAV
398"
Backlighting = Off
Longitude Direction = West
Position Corrections = Off
Units = NMiKTS
Arrival Alarm = 0.10 nm
Other Alarms = 0.00 nm
Hard reset only:
I
Waypoint
Memories = 0
Route Plan Memories = 0
WPT Destination = 00 (No XTE bargraph or digits)
MAINTENANCE 4-2