The system and method of the present invention comprises functionality to record the steps of a user’s navigation transaction and to subsequently play back those steps to determine service availability and levels. In a non-injection state, a three-way valve is controlled to be OFF to form a communication passage in the direction indicated by the arrow B and a two-way valve is controlled to be ON. Thereafter, the semiconductor wafer is conveyed to a dicing apparatus in a state in which the tape with the ring is affixed to the wafer main surface without peeling of the tape, and dicing is performed from the back surface side of the semiconductor wafer to divide the wafer into individual semiconductor chips. The second time base includes a phase lock loop for adapting the frequency of the second timer signal according to the frequency of the reference timer signal. The snippet also including a copy of the instruction containing the unresolved reference. The at least one eye chamber comprises a flange extending from the headband, wherein the flange is configured to provide at least a water-resistant seal around the wearer’s eye.