A submersible apparatus is configured to eject air and/or water in desired predetermined patterns to simulate particular types of ordnance to facilitate safe and effective splash testing of ship radar systems. The apparatus includes a frame, one or more adjustable buoyancy bodies, a source of fluid such as an air compressor or a water pump, and a plurality of nozzles through which the fluid is ejected to create the desired splash. Fluid can be supplied to the buoyancy bodies to adjust the level of the apparatus in the water as necessary to simulate a particular type of ordnance. Additionally, the nozzles can be individually adjustable to facilitate ordnance simulation. A control system is provided to enable remote and/or preprogrammed control of the apparatus. A wireless or hard wired link can be provided to allow a remote user to control the apparatus in real time.