The simulation of experiments in deep ocean environments is becoming increasingly important to research due to expensive and complex modern equipment. Accurate simulations allow for more efficient use of ship time. LAMSS (Laboratory for Autonomous Marine Sensing Systems) at MIT has developed an indispensable tool for simulating real time active sonar experiments using a combination of ray tracing software (Bellhop), MATLAB, and MOOS (Mission Oriented Operating Suite). A new key component to this toolbox is a module that models surface reverberation. Power conservation also becomes extremely important when operating in the deep ocean and switching to passive sonar may be a better allocation of power. This talk will describe the new active simulator as well as discuss using the Matching Pursuits algorithm in passive sonar target tracking.