When an estimated alcohol concentration is higher than a specified concentration, an operation time of an engine is cumulated to obtain an alcohol cumulative operating time. The proposed selective compactor employs a linear compactor with selection circuitry for selectively passing test responses to the compactor. A service request is received for providing a network service to the mobile station at the registration node. Deflectors that span and subdivide the internal cavity include at least one orifice for the passage of water and air. Node-specific lists about opened packet data connections for which a node is responsible are maintained, and using these node-specific lists second data packets, which are data packets relating to any opened packet data connection specified in a node-specific list, are processed.