A processor 180 of a navigation device 100 acquires current position information about a current position of a vehicle. During a power up sequence, the VCM provides gradually increasing voltage signals to the amplifier to cause a voltage at the output of the amplifier to increase gradually. The matchcodes for the plurality of records may be compared to identify matching pairs of matchcodes, wherein for the purpose of identifying a matching pair of matchcodes, two characters are considered the same if they are equal or if one or both are wildcard characters.