Abstract: A mechanical computer used in tandem with a GPS to approach, enter and fly the traffic pattern of any uncontrolled airport. Pilots must navigate to a relatively small area or approach point before entering the traffic pattern of an uncontrolled airport. While airports are programmed into GPS units, the approach points are not. The computer works in tandem with an onboard GPS unit programmed for navigation direct to the airport of intended landing and employs triangulation to navigate to an approach point from which a proper traffic pattern entry can be made.