A location based service and method configured to provide a mechanism for information to a subscribing user. The hydraulic thruster incorporates at least one lower unit housing tiltably attached to a base at a base lower unit cutout laterally offset from a helm platform. The composite box structure preferably includes a pair of end walls, a pair of side walls, a floor assembly and a roof assembly. The belt charging unit is provided in contact with the insulating layer so as to charge the insulating layer with a positive charge and a negative charge alternately in a moving direction of the conveying belt by applying an AC bias to the conveying belt. The capacitance between BL and BLN are substantially reduced as well as the capacitance to neighboring column BLs and BLNs.