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5. CUSTOMIZING YOUR UNIT
5-25
Contents of GPS sensor setup menu (con’t from previous page)
Item Description Settings Default Setting
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 variance by increasing
the smoothing. Like with latitude and longitude
smoothing, the higher the speed and course
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 zeros.
0-999 sec
5 sec
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 sec 60 sec
Latitude,
Longitude
Offset
Offsets latitude position to further refine position
accuracy. Use the N
<− −>
S soft key to switch
coordinate.
0.001’S – 9.999’N
0.001’E – 9.999’W
0.0’ (no offset)
Disable
Satellite
Every GPS satellite is broadcasting abnormal
satellite number(s) in its Almanac, which contains
general orbital data about all GPS satellites,
including those which are malfunctioning. Using this
information, the GPS receiver automatically
eliminates any malfunctioning satellite from the GPS
satellite schedule. However, the Almanac
sometimes may not contain this information. If you
hear about a malfunctioning satellite from another
source, you can disable it manually. Enter satellite
number (two digits, max. 3 satellites) with the
trackball and [ENTER] knob and press the ENTER
soft key.
None
Latitude
Sets initial latitude position after cold start. Use the
N
< − −>
S soft key to switch coordinate.
—
45
°
35.000’N
Longitude
Sets initial longitude position after cold start. Use
the W
< − −>
E soft key to switch coordinate.
—
125
°
00.000’W
Antenna
Height
Enters the height of the GPS antenna unit above
sea surface. For further details refer to the
installation manual.
0-99 m 5 m
GPS Fix
Mode
Chooses position fixing method:
2D (
three
satellites in view), 2D/3D (three or four satellites in
view whichever is greater)
.
2D, 2D/3D 2D/3D
Cold Start Clears the Almanac to receive the latest Almanac. No, Yes No
GPS
STATUS
(soft key)
Displays GPS satellite status display. Requires GPS Receiver GP-310B or GPS navigator
outputting the data sentence GSA or GSV. For further details see the chapter on Maintenance.