diff --git a/Tools/autotest/fakepos.py b/Tools/autotest/fakepos.py
index 9793dc7822..36acc63fa0 100755
--- a/Tools/autotest/fakepos.py
+++ b/Tools/autotest/fakepos.py
@@ -36,22 +36,6 @@ class udp_out(object):
             pass
 
 
-def ft2m(x):
-    return x * 0.3048
-
-
-def m2ft(x):
-    return x / 0.3048
-
-
-def kt2mps(x):
-    return x * 0.514444444
-
-
-def mps2kt(x):
-    return x / 0.514444444
-
-
 udp = udp_out("127.0.0.1:5501")
 
 latitude = -35
diff --git a/Tools/autotest/pysim/fg_display.py b/Tools/autotest/pysim/fg_display.py
index 9bfb0a5069..7480bec749 100755
--- a/Tools/autotest/pysim/fg_display.py
+++ b/Tools/autotest/pysim/fg_display.py
@@ -44,21 +44,6 @@ class udp_socket(object):
             pass
 
 
-def ft2m(x):
-    return x * 0.3048
-
-
-def m2ft(x):
-    return x / 0.3048
-
-
-def kt2mps(x):
-    return x * 0.514444444
-
-
-def mps2kt(x):
-    return x / 0.514444444
-
 udp = udp_socket("127.0.0.1:5123")
 fgout = udp_socket("127.0.0.1:5124", is_input=False)
 
diff --git a/Tools/autotest/pysim/util.py b/Tools/autotest/pysim/util.py
index 6a0f6c9dff..d81ac6af38 100644
--- a/Tools/autotest/pysim/util.py
+++ b/Tools/autotest/pysim/util.py
@@ -29,24 +29,6 @@ RADIUS_OF_EARTH = 6378100.0  # in meters
 windowID = []
 
 
-def m2ft(x):
-    """Meters to feet."""
-    return float(x) / 0.3048
-
-
-def ft2m(x):
-    """Feet to meters."""
-    return float(x) * 0.3048
-
-
-def kt2mps(x):
-    return x * 0.514444444
-
-
-def mps2kt(x):
-    return x / 0.514444444
-
-
 def topdir():
     """Return top of git tree where autotest is running from."""
     d = os.path.dirname(os.path.realpath(__file__))