Part visibility based on AI UNIT MODE

Hi all, what code do I need to make a part of AI obj. appear/disappear depending on the state of the AI object? A part of my ferry should not be visible when it's moving. At the moment I check the speed of the object, but this is not a good solution because when ferry leaves the port, it backs up, stops for a moment (part appears!) and then starts its trip. However, during the whole trip, the object's AI UNIT MODE (new FSX variable) is 4 (waypoint mode), so it would be wise to check unit mode instead of speed. How to make part visible only when AI UNIT MODE is 4?Current solution:AiObj_moving (A:AIRSPEED TRUE, knots) 0.01 > if{ 1 } els{ 0 }