diff --git a/sw/airborne/subsystems/navigation/flightzone.c b/sw/airborne/subsystems/navigation/flightzone.c
deleted file mode 100644
index 5cb947cf75..0000000000
--- a/sw/airborne/subsystems/navigation/flightzone.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * Copyright (C) 2007  Arnold Schroeter
- *
- * This file is part of paparazzi.
- *
- * paparazzi is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * paparazzi is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with paparazzi; see the file COPYING.  If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * @file  subsystems/navigation/flightzone.c
- *
- * Check whether a point is inside the polygon limiting the competition area.
- *
- * todo:            - support concave/convex polygons
- *                  - sort points automatically
- *                  - minimize size of Orthogonal[]
- *
- *
- * limitations:     - boundary polygon has to be convex
- *                  - points have to be ordered clockwise
- *
- * author:          Arnold Schroeter
- * history:
- *                  2.9.07 initial version
- *
- */
-
-#include "flightzone.h"
-
-typedef struct { COORD_TYPE x;
-  COORD_TYPE y;
-} POINT;
-
-POINT Corner[] = {
-  12, 18,
-  12, 25,
-  15, 29,
-  18, 25,
-  18, 18,
-  13.5, 16,
-  0 , 0}; // last corner is a dummy, which must not be deleted!!!
-
-POINT Orthogonal[20]; // Attention!!! array must be at least as long as Corner[]
-
-unsigned char bNumberOfCorners = 0;
-
-/*******************************************************************
-; function name: vInitIsInsideBoundaries
-; description:
-;*******************************************************************/
-void vInitIsInsideBoundaries(void)
-{
-  unsigned char i;
-
-  bNumberOfCorners = sizeof(Corner)/sizeof(POINT) - 1; // last corner is always a dummy
-
-  Corner[bNumberOfCorners].x = Corner[0].x;
-  Corner[bNumberOfCorners].y = Corner[0].y;
-
-  for (i = 0; i < bNumberOfCorners; i++)
-  {
-    Orthogonal[i].x =     Corner[i+1].y - Corner[i].y;
-    Orthogonal[i].y =  - (Corner[i+1].x - Corner[i].x);
-
-#if 0
-    printf("%d: corner (%f, %f), orthogonal (%f, %f)\n",
-           i, Corner[i].x, Corner[i].y,
-           Orthogonal[i].x, Orthogonal[i].y);
-#endif
-  }
-
-}
-
-/*******************************************************************
-; function name: iIsInsideBoundaries
-; description:
-;
-; parameters:
-; returns:       1 if point is inside boundaries
-;                0 if point is outside boundaries
-;*******************************************************************/
-int iIsInsideBoundaries(COORD_TYPE x, COORD_TYPE y)
-{
-
-  int r = 1;
-  static unsigned char i;
-
-  i = 0;
-
-  while ((i < bNumberOfCorners) && (r == 1))
-  {
-    if (((x - Corner[i].x) * Orthogonal[i].x + (y - Corner[i].y) * Orthogonal[i].y) < 0.)
-    {
-      r = 0;
-    }
-
-    ++i;
-  }
-
-  return r;
-}
diff --git a/sw/airborne/subsystems/navigation/flightzone.h b/sw/airborne/subsystems/navigation/flightzone.h
deleted file mode 100644
index be0490d38b..0000000000
--- a/sw/airborne/subsystems/navigation/flightzone.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 2007  Arnold Schroeter
- *
- * This file is part of paparazzi.
- *
- * paparazzi is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * paparazzi is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with paparazzi; see the file COPYING.  If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * @file  subsystems/navigation/flightzone.c
- *
- * Check whether a point is inside the polygon limiting the competition area.
- *
- * author:          Arnold Schroeter
- * history:
- *                  2.9.07 initial version
- *
- */
-
-#ifndef FLIGHTZONE_H
-#define FLIGHTZONE_H
-
-#define COORD_TYPE float
-
-void vInitIsInsideBoundaries(void);
-int iIsInsideBoundaries(COORD_TYPE x, COORD_TYPE y);
-
-#endif /* FLIGHTZONE_H */