A three-dimensional imaging system for use with a sonar system. The three-dimensional imaging system processes forward-looking sonar data, side-looking sonar data, bathymetric data, detection and cluster data, bottom sediment type data, and vehicle position and navigation data and renders a complete three-dimensional image of an ensonified region.

A device that monitors a person's location and compares it to a database of fish and game regulations for a given area. The user can verify position, but can also display fish and game regulations that apply in that area. Moreover, the unit can also monitor the user's position with respect to boundaries. If the user crosses into another area, the unit can alert the user of this and the user can then discover the rules for the area and if necessary, leave the area. In this way, hunters and fishers can now travel through the back country confident that they always know the regulations and boundaries of the areas that they occupy.

A system for underground surveying includes a plurality of substantially rigid frames and a plurality of acoustoelectric sensors for generating electrical signals encoding echo responses of underground surfaces. Each of the frames carries at least one of the sensors, the sensors being disposable in effective physical contact with underground structures upon an insertion of the frames through a ground surface. An acoustic energy generator is disposed on at least one of the frames, while position determination componentry is operatively connected to the sensors for determining locations of the sensors relative to one another. An electronic signal processor is operatively connected to the sensors for analyzing the electrical signals in accordance with the determined locations of the sensors to determine surfaces of an object hidden underground and for generating a video signal encoding an image of the object. A video monitor is operatively connected to the processor for displaying the image of the object.

A system and method of use for determining a desired physical parameter relating to a load deployed by a movable vessel, in a predetermined plane, using a sensor disposed proximate the load underwater where the sensor produces a transmittable signal indicative of the desired physical parameter and communicates the signal, via a communication link, to a receiver that receives and indicates the pressure signal. A deployment frame may be used to further support the load. Once deployed, the load encounters water having changes in the detected physical parameter and the sensor sends a signal indicative of the changes such as to a controller or computer located on a movable vessel. These signals can be used to determine movement and positioning of the load, e.g. when positioning the load proximate an underwater structure. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope of meaning of the claims.

The sonar array system includes a receive array of hydrophones and a transmit array of acoustic projectors disposed on a common axis. The sonar array system can be coupled to a ship and deployed and recovered from a single winch and through a single ship hull penetrator. When towed through water by the ship, the sonar array system provides a substantially horizontal transmit/receive array.