An integrated circuit package having a multi-segment transmission line transformer for impedance matching a packaged integrated circuit, such as a driver or receiver, to a printed circuit board transmission line to which the packaged chip is attached by, for example, solder balls. A controller is operable to receive an aggressiveness command based on an operator input. The downcomers reduce stagnant liquid regions, distribute the liquid more evenly on the trays and allow longer flow paths to be provided on the trays. A landmark selection area decision unit determines a landmark selection area for route guidance along the route based on the road network data and the road pattern data.