LONG-TERM GOALS The long-term goal of this study is to characterize and represent the uncertainty in describing environmental features that affect acoustic detection by submarines. We will investigate methods on how the uncertainty in our knowledge of the ocean and bottom affects acoustic propagation, acoustic signal processing and, ultimately, the detection, classification and localization of targets. OBJECTIVES The primary objective of this component of the project is to quantify the

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... ty of the sound speed field in space and time due to internal waves. This wave-modulated sound speed field is then used by the acousticians to study the effects on acoustic propagation. Assessing the uncertainty in this estimate of internal wave variability will be an essential part of the study.