USA As Represented by Secretary of the Navy

Edward J Hilliard, Jr

Joseph J Perruzzi

John T Williamson

Megan M Gibson

Vernon P Bailey

A method for determining a bounding region for a launched weapon. The method processes the course and speed of ocean currents, and the bearing and range to an aim point to determine the resultant speed of the launched weapon. The method then processes the resultant speed to determine a course for the weapon. The method also processes the ownship position at launch, the desired aim point and the resultant speed to determine weapon run time. The method provides a mathematical distribution of the uncertainty in the speed and course of the ocean current and then processes it to generate a scatter region of possible weapon positions. The method then processes the distribution function of the mathematical distribution and the desired aim point to determine a plurality of positions that define a bounding region. Finally, the method quantifies possible positions of the scatter region that are within the bounding region.

Method and system for determining a bounding region

The present invention relates to a method and a system for determining a weapon firing strategy for an evading target. The method of the present invention comprises the steps of sensing the motion of the target, analyzing the motion of the target, providing a weapon employment decision aid, determining the evasion region for the target using the weapon employment decision aid and the analyzed motion, visually displaying the evasion region, feeding operator knowledge about the evading target, and generating a representation of the probability of the location of the evading target. The weapon employment decision aid utilizes beta density functions to determine the evasion region. The weapon employment decision aid displays target course and speed in the form of bar graphs and allows the operator to input information about target evasion course and speed and uncertainty levels.

Method and system for determining the probable location of a contact

A mine placement system is provided for determining mine launch parameters ased on launcher vehicle position, speed, and direction and on latitude. The system includes an input module for receiving launcher vehicle position, speed, and direction having a settable aim point. The input module is connected to a processor module which continuously calculates the trajectory of the mine as the launch ship maneuvers. The processor module having a vectorizer, a decoder, a time processing unit and gyroprocessing unit drives a launch display having steering cursors and a range display. The steering cursors and range display provide maneuver information to the ship's operator to steer the ship to a launch window which will allow a mine to deploy to the set aim point. In addition to displaying the set aim point, the display also shows the present actual mine placement point based on the launch ships present location and velocity. Whenever a mine is launched, the system records the actual mine placement point. The method of the system includes manually entering the weapon type and the latitude/longitude of a desired aim point. The system then reads the inertial position and heading of the launch ship. By comparing the ship's heading and position to the aim point, the processor drives a launch display showing range and bearing to a launch window. The heading and run time are corrected for Coriolis effect and for a constant water current.

Underwater mine placement system

An acoustic transducer system employs a seawater return cable as a receiver lement. The cable is either open ended or short circuited with the seawater. A carrier frequency is applied at one end of the cable. Acoustic pressure waves impinging the cable change the characteristic input impedance of the cable. The changes in the impedance amplitude and phase angle are processed to derive information descriptive of the acoustic source.

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Middletown, RI, United States of America

Edward J Hilliard, Jr