Nielsen-Kellerman ClearNav - Manual (Page 50)

NK ClearNav Manual • Version 0.5 • July 3, 2008
Page 50 of 86
viewed out the window match the data displayed on the map. Others will prefer to turn off the
Water data to reduce screen clutter. It is very easy to turn the display of the Water data on an
off. It can be enabled and disabled independently of the Culture and Terrain data.
• Landable Only
The Landable Only checkbox is used to hide any waypoints that are not setup in the waypoint
database as “landable”. It could be used when low to make it easy to view only airports or
fields which can be used for landing. The default setting is unchecked – so that all waypoints
will be displayed on the map, whether you can land there or not.
Important Note: This feature is only as good as the data in the waypoint file. If the waypoint
file has the “Landable” attribute assigned to airports that are not wide enough or long enough
for your glider, you may have an “interesting” landing. It is your job to assure that the data in
the waypoint file is correct.
• Tracks
The Tracks checkbox is used the enable or disable the display of glider tracks (“bread crumbs”)
on the map. The tracks can be extremely helpful for re‐connecting with a lift source that was
used minutes our hours earlier in the flight. Tracks are enabled by default.
• Erase Tracks
The Erase Tracks button can be used to erase all the flight track data displayed on the map. It
does not affect the flight log data in the flight recorder. One situation in which you may want
to erase the tracks is when the wind direction has changed significantly – making the circle
tracks on the map from thermals earlier in the day useless.
The Up and Down buttons are used to move through the options and the Select button is
used to toggle the checkboxes on and off or to activate the Erase Tracks button.
To exit the Show On Map Window press the Menu or Focus button, or use the Up and Down
buttons to highlight the Exit button and then press the Select button.