Nielsen-Kellerman ClearNav - Manual (Page 41)

NK ClearNav Manual • Version 0.5 • July 3, 2008
Page 41 of 86
4.2.1 Data at the Top of the Screen
There are 3 data windows on the top of the moving map display.
4.2.1.1 Destination Window
The Destination Window is located in the top left corner of the moving map screen and shows the
name of the current destination.
4.2.1.2 Distance Window
or
The Distance Window is located in the top row of the moving map screen, between the Destination
and Final Glide windows. It always displays the distance to the destination and can optionally display
the both the distance and bearing to the destination.
To toggle the display of bearing information on or off:
Menu button / Setup Menu Icon / Personal Preferences Tab / Map Display Options /
Wind & Bearing / Bearing Checkbox
4.2.1.3 Final Glide “Altitude Differential” Window
The Final Glide Window is located in the top right corner of the moving map display. The label “Alt.
Diff.” (Altitude Differential) indicates that the number displayed is the difference between the altitude
required to make it to the destination (taking into account wind, airspeed, glider polar, MacCready
setting, etc.) and your current altitude. When you are above glideslope the number will be greater
than zero and the box will be colored green. When you are below glideslope the number will be less
than zero and the box will be grey in color.
1785 feet or meters (depending on units setup) above glideslope
390 feet or meters (depending on units setup) below glideslope
Note on MacCready Setting
Changes to the MacCready setting will lead to changes in the final glide altitude differential number.
Increasing the MacCready number will indicate that you should be flying faster and have higher sink
rates and therefore require more altitude to make it to the destination.
Generally, new cross‐country pilots tend to bump the MacCready value down to zero when trying to
decide whether they can make it home. Their reasoning is that if they fly more slowly they may be
able to make it home. At first thought this seems like a conservative approach because they are