A vehicle motion control system comprising: a sliding surface; a vehicle adapted to slide on said sliding surface; and a linear motor associated with the vehicle and the sliding surface for affecting sliding motion of the vehicle on the sliding surface. Collection of a sufficient amount of hazardous liquids across the hydrophobic barrier member initiates a float release member to seal off the catch basin. tag with an electronic engraving machine capable of inscribing data on both sides such as one side of the I. In addition, an operations section, which explicitly presents concurrently executable application programs to a user and commands the startup of these programs, is displayed on a navigation screen menu. The ratios are: projectile outer diameter to projectile height between 4:1 to 5. By maintaining an address translation table and introducing communication between the switching control units within the multiple networks, it is possible to provide notification to the mobile station of the existence of a communication request from a first network while the mobile station coupled to the second network.