An air-delivered submersible vehicle system has a monocoque-construction shell made from a fiber-reinforced plastic material selected from the group consisting of thermoplastics and thermoset plastics. The shell is equipped with a wing kit so that it can be deployed from an aircraft and fly through...

A combination pressure relief valve system and undersea vehicle vents pressurized gas from lithium batteries to ambient. An undersea vehicle having an interior has a pair of hollow pylons each having a passageway fluidly communicating with the interior. A pressure relief valve is mounted on each...

Vehicle attitude is estimated relative to a ground surface over which the vehicle is traveling. An actual image of the ground surface over which the vehicle is traveling is compared with stored or predicted model images of the ground surface. The model images have corresponding known vehicle...

A method of focusing fully-coherent circular synthetic aperture sonar (CSAS) imagery is provided. A k-space representation of the CSAS image is generated using the two dimensional Fast-Fourier Transform (FFT). Sub-aperture images are generated by windowing the k-space representation and applying...

Methods and systems detect changes occurring over time between synthetic aperture sonar (SAS) images. A processor performs coarse navigational alignment, fine-scale co-registration and local co-registration between current image data and historical image data. Local co-registration includes...

A method and system for selecting a threshold for use in detecting anomalous objects, or targets, in images with a tractable false alarm rate. A method includes steps of identifying a number of peak values from a plurality of values; calculating an average peak value from the identified peak values...

A method and system are provided for automatically retrieving information associated with vehicles that must sequentially pass an entrance to a secure site. Prior to the entrance to the secure site, a plurality of vehicles can be aligned in a queue having a front end located at the secure site's...

An autonomous craft controller system for automated control of operation of a landing craft air-cushioned vehicle includes a command processor, a bow thruster controller, a prop pitch controller, and a rudder controller. The command processor receives and processes multiple inputs relating to...

A barrier dissipates energy from wakes from high speed vessels. Pilings embedded in the seabed slidably extend through openings in a flotation section below the surface of the water and through apertures in a gate section above the surface of the water. Struts on the flotation section extend...

An electrical power supply arrangement incorporates a turbine-generator assembly providing a self-contained non-battery electrical power source for supplying power to a breathing apparatus. The turbine-generator assembly is interposed in an air hose extending between first and second stage pressure...