Garmin GPSMAP 130 - Manual (Page 71)

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• CDI Steer To allows you select a steer-to-center or steer-to-D-Bar orientation for
graphic steering guidance. The steer-to-center selection displays your position as the
vertical line on the scale, and your desired track as the center of the scale. The steer
to D-Bar option displays your position as the center of the scale, with the desired
track as the vertical line. The default setting is steer to center.
• Map Datum provides a list of the available map datums for use with the GPSMAP
system. For a list of the available GPSMAP datums, see Appendix D. The default set-
ting is WGS 84.
• Velocity Filter allows you to select the GPSMAP’s response time to changes in
track or ground speed. Three settings are available: automatic, on, or off. The ‘auto’
(default) setting will monitor the changes in your current track and speed and
adjust the receiver’s response time automatically. The ‘on’ setting allows you to
manually enter a response time up to 240 seconds. Selecting a higher setting may be
desirable in slow-speed applications with frequent changes in track.
To enter a user defined velocity filter value:
1. Highlight the ‘Velocity’ field and press T . Select the ‘On’ option and
press T .
2. Highlight the time value field.
3. Press T .
4. Enter a value in seconds (up to 240) and press T to confirm.
A. CAUTION! Using the incorrect map datum can
seriously effect the accuracy of your GPS receiver.
The GPS datum should always match the datum of
the local chart you are using. If no datum informa-
tion is indicated on the charts you are using, contact
the chart manufacturer.
B. Keeping the velocity filter on the ‘Auto’ setting will
allow the GPSMAP 130 to automatically monitor
and adjust the response time for track and speed
calculations.
SECTION
9
SETUP MENUS
Navigation Setup
gps 130 7/23/98 9:22 AM Page 61