Semcor, Inc. Propose to perform the following tasks: (a) collect data pertinent to the recording requirements of p-3c update iv, (b) perform a comparative analysis of the sensor data, (c) evaluate the operational aspects, (d) analyze interface and integration requirements, (e) investigate logistic support and multiplatform commonality, (f) survey the state-of-the-art for likely technologies, (g) perform a trade-off study, and (h) recommend an approach that supports rapid recall for VP operations, and supports post-mission analysis and mission planning at ground facilities. The phase I results will provide the basis for a functional specification of a recorder/reproducer subsystem.