A satellite based positioning method and system including storing satellite sub-almanac data on a mobile station. The present tacker apparatus is able to prevent of the problem of jammed tacker pins, by applying a horizontal elasticity for stably guiding the tacker pin horizontally in addition to an upward elasticity for moving the tacker pin upward. The downstream end portion of the incoming conveyor unit includes a first conveyor belt and a second conveyor belt forming juxtaposed first and second conveyor belt runs between which the items are frictionally engaged when carried along the incoming portion of the transport paths.