Nielsen-Kellerman ClearNav - Manual (Page 66)

NK ClearNav Manual • Version 0.5 • July 3, 2008
Page 66 of 86
• Using Auto / Using Manual Button
The Using Auto / Using Manual button is connected to the Predicted Speed values that are
displayed below it. When it is highlighted press the Select button to toggle between manual
and automatic calculation of the Predicted Speed. The default is Using Auto. The ClearNav
always automatically calculates Predicted Speed using your climb and glide performance to this
point and taking into account the final glide portion of the flight during which the average
speed will increase because you won’t be stopping to thermal. The automatically calculated
speed is always displayed on the far right edge of the screen. The manually entered number is
displayed in an edit box to the left of the automatically calculated number. In Using Auto mode
the calculated speed is automatically bumped into the “manual” speed position. When in Using
Manual mode the calculated speed can be used as a reference and you can manually set the
Predicted Speed. Most pilots will probably use the Using Auto mode most of the time. A good
example of when it makes sense to manually enter the predicted speed is when you know that
you will be flying much faster or slower for the remainder of the task due to changes in the
weather or type of soaring flight – such as a cloud street or isolated storm up ahead or a
transition to ridge running or wave flight. When it Using Auto mode, manually editing the
Predicted Speed will change the mode to Using Manual mode.