AvMap GeoPilot II Plus - Manual (Page 58)

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Vertical Navigation can be activated (On) only if a Flight Plan is active (destination present).
Destination point for Vertical Navigation is the last point of the Route or destination of GoTo
mode.
Prior to the Descent Point being reached the Distance To Go displays TO, Time To Go to Descent
point and Descent Rate from the current position. After passing Descent point the system displays
TO, Time To Go to the Destination and Target altitude based on actual descent profile. Time To
Descent or Target ALT values can be displayed in the Data Window of Moving Map and HSI modes.
The Vertical Navigation value displayed in the HSI is calculated as a difference between current
altitude (from GPS) and Target altitude.
10.5 WInd CAlCUlATIon
The Wind Calculation feature computes winds aloft by comparing Ground Speed and Track with
indicated heading, indicated air speed and Outside Air Temperature.
> ‘MENU’ 1 sec. + “CALCULATOR” + ‘ENT’ + “WIND CALCULATION” + ‘ENT’
User data is entered in the fields at the bottom half of the screen. To set Wind Calculation parameters
use ‘ENT’ to edit the selected field (a box appears around the active field) and the cursor key to
move between fields. Press ‘ESC’ to return to Calculator menu.
Note
This function works best when the airplane is straight and level.
Wind Calculation is a full screen page with the following structure:
Fig. 10.5 - Wind Calculation page
The Geopilot II Plus computes wind velocity and direction from the information entered above
and from the current Ground Speed,Track and Altitude, which are derived from GPS data. ETE to
Waypoint is also based on GPS Ground Speed and Track. Wind information will be recomputed
when the heading, air speed, air temperature or Altitude values are edited.
Note
The wind calculator does not correct for local barometric pressure, which may not be known accurately enroute.
The values produced by the wind calculator may therefore differ from the true winds by up to 5%.