The primary goals of our MIT effort are to: (i) employ and develop our regional ocean modeling, data assimilation and uncertainty quantification for the estimation of sound speed variability, coupled oceanographic-acoustic forecasting and inversion relevant to the POINT effort; (ii) apply our theory and schemes for optimal placement, path planning and persistent ocean sampling with swarms of ocean drifters and other acoustic source platforms; and (iii), further quantify the ocean dynamics and variability of the regional areas of interest, utilizing our multi-resolution data-assimilative ocean modeling and process studies.