8. CUSTOMIZING YOUR UNIT
8-8
8.3
ADVANCED Menu
The ADVANCED menu calibrates data.
FIX
Item
Settings
FIX CORRECTION
GPS-generated position may be off by some
seconds because of various factors. In this
case, you can automatically correct GPS
position by selecting On.
COMPUTE CORRECTION
Corrects the GPS antenna position. After
placing the cursor at the own ship's true
position, select this item.
CORRECTION OFFSET
Corrects the GPS antenna position manu-
ally. Enter the longitude and latitude numeric
data of own ship's true position.
POSITION FILTER
When the DOP or receiving condition is
unfavorable, the GPS fix may change, even
if the vessel is dead in water. This change
can be reduced by smoothing the raw GPS
fixes. You can choose the setting from
among Off, Low, Medium and High. The
higher the setting, the more smoothed the
raw data, however too high a setting slows
response time to change in latitude and lon-
gitude. This is especially noticeable at high
ship's speeds. Off is normal setting; increase
the setting if the GPS fix changes.
SPEED FILTER
During position fixing, ship's velocity (speed)
is directly measured by receiving GPS satel-
lite signals. The raw velocity data may
change randomly depending on receiving
conditions and other factors. You can reduce
this random variation by increasing the filter
setting. Like with latitude and longitude filter,
the higher the speed filter the more
smoothed the raw data. If the setting is too
high, however, the response to speed and
course change slows. For no smoothing,
choose Off. (Off, Low, Medium, High)
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