length = 2;
distanceToBow = 2;
distanceToStern = 2;
a = b = c = d = 1;
// safetyBubble = new SafetyBubble(-1, null, length, beam);
hull = new Polygon();
predictedRoute = new ArrayList<Position>(200);
trail = new LinkedList<gov.nasa.worldwind.geom.Position>();
visibleTrail = new Polyline(trail);
visibleTrail.setColor(Color.WHITE);
visibleTrail.setLineWidth(2.0);