Abstract: A method for rapidly processing a directed retry (“DR”) message on a mobile station while the mobile station is void of an up-to-date neighbor list or in the process of completing neighbor list measurements. In one aspect of the invention, the method comprises the steps of receiving a directed retry message on a mobile station; setting SCANINTERVAL to zero and HL_FREQ to high if an up-to-date neighbor list does not exist on the mobile station; completing at least one neighbor list measurement within a wait time period; and invoking RTC-4. The step of completing the least one neighbor list measurement is accomplished within a wait time of about four seconds. The step of completing the least one neighbor list measurement preferably comprises completing 2 neighbor list measurements. If the wait time exceeds about four seconds the mobile station reverts to camping or idle condition.

Abstract: A sensing system for sensing acoustic waves, the sensing system comprises one or more sensor elements for use underwater, a reference sensor, and compensation means for compensating noise generated in the sensing system in dependence upon signals provided by the sensor elements and the reference sensor.