diff --git a/aman/sys/aco/Node.py b/aman/sys/aco/Node.py
index f4754bd..50d0364 100644
--- a/aman/sys/aco/Node.py
+++ b/aman/sys/aco/Node.py
@@ -42,7 +42,7 @@ class Node:
             elif -1 != turnIndices[0] and -1 == turnIndices[1]:
                 continue
 
-            trackmiles += start.haversine(star.Route[i]) * 0.539957
+            trackmiles += start.haversine(star.Route[i])
 
             # check if a new constraint is defined
             altitude = -1
@@ -133,7 +133,7 @@ class Node:
 
                 # update the statistics
                 if nextWaypointIndex < len(star.Route):
-                    distanceToWaypoint = star.Route[lastWaypointIndex].haversine(star.Route[nextWaypointIndex]) * 0.539957
+                    distanceToWaypoint = star.Route[lastWaypointIndex].haversine(star.Route[nextWaypointIndex])
                     currentHeading = star.Route[lastWaypointIndex].bearing(star.Route[nextWaypointIndex])
                     currentPosition[1] = min(weather.calculateGS(currentPosition[0], currentIAS, currentHeading), currentPosition[1])