Sitthichat (Boris) Sukpholtham We have investigated the feasibility of Reliable Acoustic Path (RAP) tomography using a mobile ship platform (R/V Kilo Moana) and the existing acoustic infrastructure at the ALOHA Cabled Observatory (ACO). Travel times of acoustic signals traveling along direct paths between the shipboard acoustic source and the bottom-mounted hydrophones were measured. Perturbations of the travel times relative to predicted travel times were obtained, based on the CTD cast closest in time to the experiment date. Stochastic linear inversion was employed to solve for the sound speed perturbation field using the travel time perturbation measurements. This provides a spatially-dependent