Furuno NAVNET 1823C - Manual (Page 197)

5. CUSTOMIZING YOUR UNIT
5-23
Contents of GPS setup menu (con’t from previous page)
Item Description Settings
Position
Smoothing
When the DOP or receiving condition is unfavorable,
the GPS fix may change greatly, even if the vessel is
not moving. This change can be reduced by smoothing
the raw GPS fixes. A setting between 000 to 999 is
available. The higher the setting the more smoothed
the raw data. If the setting is too high, the response
time required to show a change of latitude and
longitude will be too long. This is especially noticeable
if the vessel is moving fast. Increase the setting if the
GPS fix changes randomly. 0-999 seconds
Spd/Cse
Smoothing During position fixing, ship’s velocity (speed and
course) is directly measured by receiving GPS satellite
signals. The raw velocity data may vary too much
depending on receiving conditions and other factors.
You can reduce this random variance by increasing the
smoothing. The higher the smoothing setting, the more
the raw data will be averaged. If this setting is high, the
response to speed and course changes will slow. For
no smoothing, enter all zeroes. 0-999 seconds
GPS
Speed
Averaging Calculation of ETA is based on average ship’s speed
over a given period. If the period is too long or too
short, calculation error will result. Change this setting if
calculation error occurs. The default setting is suitable
for most conditions. 0-999 seconds
Latitude,
Longitude
Offset Offsets latitude position to further refine position
accuracy. 0.001’S – 9.999’N
0.001’E – 9.999’W
(Con’t on next page)