[FG28_Kodiak]

At the moment i about to finish a checkAirfield Routine:

using System;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using maddox.game;
using maddox.game.world;
using maddox.GP;

public class Mission : AMission
{
    AiAirport PlayerStartAirport;
    AiAirport PlayerEndAirport;
    AiAircraft PlayerAircraft;
    
    internal AiAirport getNearestAirfield(Player player)
    {
        AiAirport NearestAirfield = null;
        AiAirport[] airports = GamePlay.gpAirports();
        Point3d PlayerStartPos = player.Place().Pos();

        if (airports != null)
        {
            foreach (AiAirport airport in airports)
            {
                if (NearestAirfield != null)
                {
                    if (NearestAirfield != null)
                        if (NearestAirfield.Pos().distance(ref PlayerStartPos) > airport.Pos().distance(ref PlayerStartPos))
                            NearestAirfield = airport;
                }
                else NearestAirfield = airport;
            }
        }
        return NearestAirfield;
    }


    internal AiAirport getNearestAirfield(AiWayPoint waypoint)
    {
        AiAirport NearestAirfield = null;
        AiAirport[] airports = GamePlay.gpAirports();
        Point3d WaypointPos = waypoint.P;

        if (airports != null)
        {
            foreach (AiAirport airport in airports)
            {
                if (NearestAirfield != null)
                {
                    if (NearestAirfield != null)
                        if (NearestAirfield.Pos().distance(ref WaypointPos) > airport.Pos().distance(ref WaypointPos))
                            NearestAirfield = airport;
                }
                else NearestAirfield = airport;
            }
        }
        return NearestAirfield;
    }
    
    
    internal bool checkAirfield(Player player, AiAirport airport, double maxdistance)
    {
        Point3d PlayerPos = player.Place().Pos();
        GamePlay.gpLogServer(null, "Distanz zum Flugplatz {0}", new object[] {airport.Pos().distance(ref PlayerPos)});  //test
        if (airport.Pos().distance(ref PlayerPos) < maxdistance)
            return true;
        else return false;
    }


    public override void OnBattleStarted()
    {
        base.OnBattleStarted();
        MissionNumberListener = -1;
    }


    private void checkLanded(AiAircraft aircraft)
    {
        if (GamePlay.gpPlayer().Place() != aircraft)
            return;
    }

    
    public override void OnAircraftLanded(int missionNumber, string shortName, AiAircraft aircraft)
    {
        if (aircraft.Player(0) != null)
        {

            if (checkAirfield(aircraft.Player(0) , PlayerStartAirport, 2000.0))
                GamePlay.gpHUDLogCenter("Mission Successfull");
        }
    }
    
    
    public override void OnAircraftCrashLanded(int missionNumber, string shortName, AiAircraft aircraft)
    {
        if (aircraft.Player(0) != null)
        {

            if (checkAirfield(aircraft.Player(0), PlayerStartAirport, 2000.0))
                GamePlay.gpHUDLogCenter("Mission Successfull");
        }
    }



    public override void OnPlaceEnter(Player player, AiActor actor, int placeIndex)
    {
        base.OnPlaceEnter(player, actor, placeIndex);
        
        if (PlayerStartAirport== null)
            PlayerStartAirport = getNearestAirfield(player);

        
        AiWayPoint[] Wp = GamePlay.gpPlayer().Place().Group().GetWay();

        int i = Wp.Length;

        if (i > 0)
        {
            AiWayPoint EndPoint = Wp[i - 1];

            if (PlayerEndAirport == null)
                PlayerEndAirport = getNearestAirfield(EndPoint);
        }
        else GamePlay.gpLogServer(null, "No Waypoints for this Airgroup {0}", new object[] { GamePlay.gpPlayer().Place().Group().Name() });
    }
}

Should work but need some tests, above checks if the players StartAirport is the same he landed. Then you should get the message "Mission Successfull"

This

AiWayPoint[] Wp = GamePlay.gpPlayer().Place().Group().GetWay();

        int i = Wp.Length;

        if (i > 0)
        {
            AiWayPoint EndPoint = Wp[i - 1];

            if (PlayerEndAirport == null)
                PlayerEndAirport = getNearestAirfield(EndPoint);
        }
        else GamePlay.gpLogServer(null, "No Waypoints for this Airgroup {0}", new object[] { GamePlay.gpPlayer().Place().Group().Name() });

Looks for the nearest Airfield at last Player Waypoint. But i ve not integrated it in the victory conditions at time.