Ocean Acoustic Developments (OAD) develops specialist sonar performance prediction software tools for tactical acoustic exploitation of the underwater environment. Our key products, WADER and HARCAM, offer solutions for both operational users and shore-side research staff for training, planning, live implementation and post-mission analysis of anti-submarine warfare (ASW) operations. The ocean is a complex and dynamic environment, which directly affects sonar performance. Our software merges user-supplied parameters with embedded technical, meteorological and oceanographic information to provide a comprehensive tactical decision aid for naval operations. Our products simplify complex propagation loss calculations with a goal of obtaining a tactical advantage at sea through reliable underwater probability of detection calculations. Users can rapidly establish optimum sensor placement for both detection and counter-detection scenarios.