Explain VACs

manual/.vscode/ltex.dictionary.en-US.txt

@@ -2,3 +2,5 @@ Enroute
 Akaflieg
 Volksbank
 SafeSky
+GeoTIFF
+TripKits

manual/02-advanced/vac.rst

@@ -0,0 +1,69 @@
+Import visual approach charts
+=============================
+
+**Enroute Flight Navigation** is able to import visual approach charts and
+display them in the moving map.  The figure :ref:`vac` shows how this will
+typically look.
+
+.. _vac:
+.. figure:: ./VAC.png
+   :scale: 30 %
+   :align: center
+   :alt: Moving map display with approach chart
+
+   Moving map display with embedded approach chart
+
+**Enroute Flight Navigation** accepts visual approach charts in one of the
+following formats.
+
+* Geo-referenced image files in GeoTIFF format.
+* TripKits, as produced by the latest beta-version of the `AIP Browser DE
+  <https://mpmediasoft.de/products/AIPBrowserDE/help/AIPBrowserDE.html>`_
+
+.. note:: GeoTIFF is a complex format that supports a wide range of use
+  cases. For simplicity, **Enroute Flight Navigation** only supports a 
+  restricted subset of the GeoTIFF standard. If you encounter a GeoTIFF 
+  file that is not recognized by **Enroute Flight Navigation**, please 
+  `open an issue report 
+  <https://github.com/Akaflieg-Freiburg/enroute/issues/new/choose>`_.
+  We will be glad to help!
+
+.. note:: This section describes a new feature that is currently in a beta 
+  test phase. At present, the feature is only available for a small group
+  of beta testers.
+
+
+Obtain approach charts
+^^^^^^^^^^^^^^^^^^^^^^
+
+Michael Paus' free software `AIP Browser DE
+<https://mpmediasoft.de/products/AIPBrowserDE/help/AIPBrowserDE.html>`_ is able
+to generate GeoTIFF images and TripKits with approach charts for all German
+airfields. The data comes from Germany's official `AIP
+<https://aip.dfs.de/basicAIP>`_, as provided by `DFS Deutsche Flugsicherung GmbH
+<https://www.dfs.de/homepage>`_.
+
+Please contact us if you are aware of other data sources. We will be glad to
+list them here.
+
+
+Import OpenAir files on Android devices
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If you are using an Android device, you must transfer the OpenAir file to the
+device and open it there. There are many ways to transfer files, but most users
+will likely do one of the following.
+
+- Download the OpenAir file on the Android device with a web browser. The
+  browser will then offer to open the file in **Enroute Flight Navigation**.
+
+- Download the OpenAir file to a desktop computer, connect the device to the
+  desktop computer via USB, and then copy the file to the device. Afterward,
+  open the file with a file management app on the Android device.
+
+
+Import Maps on Linux Desktop
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If you are running **Enroute Flight Navigation** on a Linux Desktop machine, use
+the file manager to drag and drop the file into the app's main window.

manual/index.rst

@@ -76,6 +76,7 @@ Advanced Use
 
    02-advanced/customMaps
    02-advanced/airspace
+   02-advanced/vac
 
 
 Reference: Pages