PREL - Init the Airplane at Location
++++++++++++++++++++++++++++++++++++

:Send:
   Index of aircraft, and the type of start (see enumeration below). Depending
   on the type of start, additional parameters should be set.::

      msg = struct.pack('<4sxii8siiddddd', b'PREL',
                        type_start,             # Integer: See enumeration below
                        p,                      # 0 -> User aircraft, otherwise 1-19
                        apt_id.encode('utf-8'), # remember to encode string to bytes
                        apt_rwy_idx,            # it's an index, not the runway heading
                        apt_rwy_dir,            # again, an index
                        lat_deg, lon_deg,       # Not needed, if you use apt_id
                        ele_mtr,                # elevation
                        psi_tru,                # aircraft heading
                        spd_msc)                # speed
      sock.sendto(msg, (beacon['ip'], beacon['port']))

The "type of start" is a integer, currently one of:

 +-------------------------------+----+--------------------------------------------------+
 | Enumeration                   | Int| Meaning                                          |
 +===============================+====+==================================================+
 | loc_repeat_last               |  5 | used by ATC and reset-flt command                |
 +-------------------------------+----+--------------------------------------------------+
 | loc_specify_lle               |  6 | used by maps and the like                        |
 +-------------------------------+----+--------------------------------------------------+
 | loc_general_area              |  7 | used to auto-load new airplanes when the number  |
 |                               |    | of airplanes is increased                        |
 +-------------------------------+----+--------------------------------------------------+
 | loc_nearest_apt               |  8 | used when we are just loading a new plane,       |
 |                               |    | not wanting to change the location in any way,   |
 |                               |    | but still starting in a proper manner for the    |
 |                               |    | new airplane.                                    |
 +-------------------------------+----+--------------------------------------------------+
 |                               |    |                                                  |
 +-------------------------------+----+--------------------------------------------------+
 | loc_snap_load                 |  9 | for when we are getting snapshots from movies    |
 |                               |    | and the like, so do not want to reset the        |
 |                               |    | flt-path or move the plane!                      |
 +-------------------------------+----+--------------------------------------------------+
 |                               |    |                                                  |
 +-------------------------------+----+--------------------------------------------------+
 | loc_ram                       |  10| Ramp start                                       |
 +-------------------------------+----+--------------------------------------------------+
 | loc_tak                       |  11| Takeoff on runway                                |
 +-------------------------------+----+--------------------------------------------------+
 | loc_vfr                       |  12| VFR app to runway                                |
 +-------------------------------+----+--------------------------------------------------+
 | loc_ifr                       |  13| IFR app to runway                                |
 +-------------------------------+----+--------------------------------------------------+
 |                               |    |                                                  |
 +-------------------------------+----+--------------------------------------------------+
 | loc_grs                       |  14| Grass strip                                      |
 +-------------------------------+----+--------------------------------------------------+
 | loc_drt                       |  15| Dirt strip                                       |
 +-------------------------------+----+--------------------------------------------------+
 | loc_grv                       |  16| Gravel strip                                     |
 +-------------------------------+----+--------------------------------------------------+
 | loc_wat                       |  17| Seaplane start                                   |
 +-------------------------------+----+--------------------------------------------------+
 | loc_pad                       |  18| Helipad start                                    |
 +-------------------------------+----+--------------------------------------------------+
 | loc_cat                       |  19| Carrier cat shot                                 |
 +-------------------------------+----+--------------------------------------------------+
 |                               |    |                                                  |
 +-------------------------------+----+--------------------------------------------------+
 | loc_tow                       |  20| Glider - Tow Plane                               |
 +-------------------------------+----+--------------------------------------------------+
 | loc_win                       |  21| Glider - Winch                                   |
 +-------------------------------+----+--------------------------------------------------+
 | loc_frm                       |  22| Formation flying                                 |
 +-------------------------------+----+--------------------------------------------------+
 | loc_Are                       |  23| Refuel - Boom                                    |
 +-------------------------------+----+--------------------------------------------------+
 | loc_Nre                       |  24| Refuel - Basket                                  |
 +-------------------------------+----+--------------------------------------------------+
 | loc_drp                       |  25| B52 drop                                         |
 +-------------------------------+----+--------------------------------------------------+
 | loc_pig                       |  26| Piggy back with shuttle on top                   |
 +-------------------------------+----+--------------------------------------------------+
 |                               |    |                                                  |
 +-------------------------------+----+--------------------------------------------------+
 | loc_car                       |  27| Aircraft carrier approach                        |
 +-------------------------------+----+--------------------------------------------------+
 | loc_fri                       |  28| Frigate approach                                 |
 +-------------------------------+----+--------------------------------------------------+
 | loc_rig                       |  29| Small oil rig approach                           |
 +-------------------------------+----+--------------------------------------------------+
 | loc_pla                       |  30| Large oil platform approach                      |
 +-------------------------------+----+--------------------------------------------------+
 | loc_fir                       |  31| Forest fire approach                             |
 +-------------------------------+----+--------------------------------------------------+
 |                               |    |                                                  |
 +-------------------------------+----+--------------------------------------------------+
 | loc_SO1                       |  32| Shuttle stuff                                    |
 +-------------------------------+----+--------------------------------------------------+
 | loc_SO2                       |  33|      ""                                          |
 +-------------------------------+----+--------------------------------------------------+
 | loc_SO3                       |  34|      ""                                          |
 +-------------------------------+----+--------------------------------------------------+
 | loc_SO4                       |  35|      ""                                          |
 +-------------------------------+----+--------------------------------------------------+
 | loc_shuttle_glide             |  36| we don't access this one except by dropping the  |
 |                               |    | shuttle when it is in piggyback                  |
 +-------------------------------+----+--------------------------------------------------+

Use the “loc_specify_lle” start type to simply set the lat, lon, and elevation as you like.
You can leave the airport info unset in that case.

Use "loc_ram" or "loc_tak" and specify an airport to start at an airport.

.. toctree::
   :maxdepth: 1