Performance of Passive and Active Sonars in the Philippine Sea

The objectives this year have been to model the features of a CZ which we observed in the PhilSea09 experiment. The data from this found very abrupt transitions and into the CZ’s and narrow widths for them. We note that not all CZ’s ”focus”, i.e. sharp edges as we observed in the Philippine Sea. This feature has been noted by Brekhovskikh and Munk where they noted that such zones tend to remain clustered for many CZ’s. (3),(5) We are also concerned with the width of the transitions as well as the stability of signals once a receiver is within a CZ. These factors have significant implications for source localization at CZ ranges.