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Match Document Document Title
9013953 Buoy based marine seismic survey system and method  
A seismic survey system for recording seismic data underwater. The system includes first plural buoys configured to descend to a first predetermined depth (H1) in water, at least one buoy having a...
8990002 Method and apparatus for determining the relative position of a target  
A method, apparatus and system are provided to permit an aerial asset to determine its current location and to, in turn, locate and track a target even as efforts are made by others to jam or...
8614578 Attenuation of electromagnetic signals passing through conductive material  
The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to...
8605540 Method and devices for underwater deployment of a structure  
Described herein are methods and devices for underwater deployment of a structure. For example, the embodiments described herein are particularly focused on sonobuoys that are configured for...
8492692 Unmanned aerial vehicle based sonar buoy  
A sonar buoy includes a fuselage having a tube-like shape, one or more wings coupled to the fuselage, an engine coupled to the fuselage and operable to propel the sonar buoy through flight, and a...
8442709 Underwater investigation system providing unmanned underwater vehicle (UUV) guidance based upon updated position state estimates and related methods  
An underwater investigation system may include a host ship, a UUV including a propulsion device and a steering device, and at least one sonar system. The system may further include a guidance...
8059485 Communication system, information collecting method and base station apparatus  
A communication system for obtaining predetermined information from an underwater terminal via a sonobuoy is provided. The system includes an underwater terminal for transmitting and receiving...
7986585 Reception of uplink data from sonobuoys  
A method for improving the bit error rate in digital transmissions of sonobuoy sensor data from a sonobuoy to a receiver platform includes computing a send checksum on a frame of sonobuoy sensor...
7697374 Water inflatable volumetric hydrophone array  
A hydrophone array includes an inflatable shaped housing enclosing an interior space and formable between a collapsed configuration and an expanded configuration, a framework of compliant material...
7430152 System and method of operation thereof for increasing acoustic bandwidth of transmitting devices  
Disclosed is a system, and a method of operation thereof, which improves the RF link employed between a transmitting sonobuoy and an associated receiving aircraft. The sonobuoy receives acoustic...
7184363 Buoyant container with wave generated power production  
An apparatus designed to float on or in a liquid has at least two buoyant members. The apparatus utilizes relative motion between the buoyant members to generate power, and the buoyant members are...
6859419 Laser-based acousto-optic uplink communications technique  
An apparatus for enabling acousto-optic communication comprising an in-water platform comprising means for emitting an acoustic signal to an acousto-optic interaction zone, an in-air platform...
6813218 Buoyant device for bi-directional acousto-optic signal transfer across the air-water interface  
A buoy system bi-directionally communicates in-air and underwater. A buoy having a shell to float on water has an upper portion in air and a lower portion in water. An array of acoustic...
6711095 Expenable/recoverable voice and data communications system buoy  
An untethered communications buoy system has an untethered buoy freely floating on the surface of water to not compromise the location of the submersible. The submersible has a cavity containing a...
6693847 Buoy for fish finding method and system  
A fishing system buoy has a watertight bulbous shell housing an electronic load and with a center of mass located within a lower half of the shell. The load includes sonar operatively coupled via...
6687186 Sonobuoy deployment method  
A method of deploying sonobouys includes providing an airborne aircraft having a computer and a plurality of sonobouys; making a contact with a submarine; determining a position of the submarine,...
6597631 Compact expandable platform using material memory for sensor deployment  
An expandable platform for deploying sensors in a medium includes a housing and a structural member disposed inside the housing. A releasable restraint is connected to the structural member....
6400645 Sonobuoy apparatus  
Sonobuoy apparatus which fits into an A sized canister for use in the water environment. The apparatus includes an array of telescopic arms connected by hinges to a housing which contains receiver...
6380889 Reconnaissance sonde  
A reconnaissance sonde to be dropped and erected in an area for wirelessly transmitting data to a data processing apparatus. The sonde includes a housing having top and bottom portions; a...
6307810 Underwater launched acoustic warning assembly  
An acoustic warning assembly capable of being launched from an underwater vehicle while being underwater. The acoustic warning assembly includes an acoustosensitive member for collecting...
6220168 Underwater intelligence gathering weapon system  
An underwater intelligence gathering weapon system accurately places a weapon underwater and then communicates therewith from other platform(s). The weapon is equipped to maneuver through the air...
6089345 Elastic wave exploration tool for wells  
A well tool in accordance with the invention comprises an attenuation device which attenuates tube waves associated with an elastic wave emission and/or reception set (1, 12). The attenuation...
6058071 Magneto-inductive submarine communications system and buoy  
A magneto-inductive submarine communication system and buoy provide two-way signal communications between a submerged craft, such as a submarine and remote command station that may be airborne, on...
RE36643 Buoyed sensor array communications system  
A buoyed sensor array communications system comprises multiple sensor syss electrically connected to a signal transmission line which are positioned at predetermined locations along the signal...
5973994 Surface launched sonobuoy  
A sonobuoy device for tracking and targeting submarines. The sonobuoy dev comprises a sonobuoy having aft and forward sections interconnected with each other, fin means mounted on the aft section...
5963506 Low flow noise sonobuoy suspension system  
A low flow noise sonobuoy suspension system having a surface float, a sussion cable having a compliant portion, a bridle, a hydrophone, a mechanical cable, a terminal weight, and a drogue. The...
5742645 Method of digital demodulation of a composite signal  
A method for digitally demodulating a complex modulation signal and allowing different parameters to be transmitted thereby. The input signal is baseband filtered and a complex demodulation is...
5691957 Ocean acoustic tomography  
An acoustic tomography telemetry system and method allowing spatially averaged ocean temperatures to be measured in real-time. The system includes autonomous acoustic sources mounted on subsurface...
5224074 Sonobuoy for forming virtual vertical sensing arrays  
A sonobuoy for forming a plurality of virtual vertical arrays, the sonobuoy aving means for receiving and expelling water to cause said sonobuoy automatically to descend and rise in a water...
5175708 Battery powdered acoustic transponder for use in underwater environment  
An acoustic transponder device includes waterproof housing that accepts a battery pack with a water displacing connection placing the housing and battery pack in communication. The housing carries...
5117396 Large, air deployable, volumetric hydrophone array  
An air deployable, volumetric hydrophone array uses three horizontal booms adiating from a central hub suspended at the array operating depth. Loose lines of hydrophones are hung from pairs of...
5065370 Programmable pulse shaper for sonobouy apparatus  
This invention discloses electronic circuit that can be either embedded in n oceanographic sonobuoy housing or used as stand-alone equipment and which establishes and generates sonar signals of a...
5060206 Marine acoustic aerobuoy and method of operation  
A marine acoustic detector for use in identifying a characteristic airborne sound pressure field generated by a propeller-driven aircraft including a surface-buoyed resonator chamber tuned to the...
5056065 System for deploying horizontal line array  
A sonobuoy system and method for deploying an array of transducers in a substantially horizontal line at a desired depth below the surface of a body of water. The trailing end of the array is...
5040157 Expendable virtual vertical sensing array  
A method and apparatus of determining the range and depth of a far field underwater target is provided. A multi-sensor device is released into the water from a surface ship or other deploying...
5022012 Acoustic sensing arrangements  
An underwater sensing arrangement in which hydrophones are embodied in horizontally disposed arms of a hydrophone support structure adaptive to be suspended below the surface of the water and in...
5020032 Sonobuoy suspension system  
A sonobuoy suspension system is disclosed wherein a spring motor having a substantially constant output torque is mounted within an upper sonobouy unit secured to a buoyant flotation member....
5016227 Top mounted buoy signaling device  
A top mounted buoy signaling device for marine navigation which is selectively activated in response to a coded address signal. The buoy signaling device includes a buoy having a top mounted...
4962488 Technique for surface to surface communications using high frequency radio with low probability of intercept signaling  
A high frequency (HF) communications buoy that employs HF surface wave, and sky wave, communication and spread spectrum modulation to suppress multipath fading and to decrease the undesired...
4924445 Sonobuoy cable pack  
A sonobuoy comprising: a sonobuoy body; a main cable having a proximal end secured to the body and a distal end; a spool on which the cable is wound from the distal end toward the proximal end;...
4903243 Marine transponder system  
A marine transponder system which is selectively activated to produce a predetermined signal pattern of light/sound/radio transmissions for maritime devices and structures such as navigational...
4901287 Underwater sonar array  
A sonar array connected to a data unit includes a substantial number of hydrophone units distributed along a small diameter cable having a substantial number of connecting wires, a center strength...
4890334 Buoy structure for detecting fishing grounds  
A buoy for detecting fishing grounds, mainly comprised of an upper body, a lower body, a water-proof ring, a FM antenna, a PC Board, a pad, a rechargeable battery, an insulator, an ultrasonic wave...
4879694 Difar demultiplexer circuit  
A demultiplexer circuit responsive to a composite input signal from a sonobouy. The invention circuit has a filter and comparator means responsive to the composite signal for providing a filtered...
4868792 Difar demultiplexer test circuit  
A demultiplexer test circuit having a signal source summing means responsive to a selected target angle theta for adding a first independent noise signal to an input signal to provide a composite...
4861297 Releasable airborne buoy particularly for undersea listening  
A buoy released from an aircraft for carrying out under water listening includes a balloon fixed to a body by way of a set of halyards extending from the top to the base of the balloon and fixed...
RE33014 Cable deployment unit  
In a system for deploying an immersible unit by a cable from a floating platform, the cable deploys freely from a cable deployment unit until a comparator unit, which provides for variable depth...
4853900 Stabilized suspension for immersible apparatus  
Motion of an instrument suspension cable assembly is attenuated in a liquid aving flow fields and surface swells. Strumming which causes vibratory motion is precluded by enclosing the cable...
4805160 Data transmission method for ocean acoustic tomography  
The present invention enables tomography data in the sea to be collected and transmitted via an artificial satellite to a ground station. Accordingly, data on the Doppler phenomenon and shift of a...
4777627 Extendible sonobuoy apparatus  
A sonobuoy has several components slidably mounted in an elongated tube. The components are longitudinally stacked one above the other at the lower end of the tube when the sonobuoy is in a...

Matches 1 - 50 out of 122 1 2 3 >