This thesis examines ASW eFusion, an anti-submarine warfare (ASW) tactical decision aid (TDA) that utilizes Kalman filtering to improve battlespace awareness by simplifying and automating the track management process involved in anti-submarine warfare (ASW) watchstanding operations. While this program can currently help the ASW commander manage uncertainty and make better tactical decisions, the program has several limitations. Commander, Anti-Submarine Warfare Force U.S. Third Fleet/Commander, Task Force THREE FOUR (CTF-34), seeks to utilize ASW eFusion's playback feature to re-analyze ASW...