developed, patented and produced by the Submarine Signal Company of Boston. The company produced submarine acoustic signals, first bells and receivers then transducers...

pioneered the production of shipboard radar systems, particularly for submarine detection. Raytheon ranked 71st among United States corporations in the...

or microphones. This development of submarine signals was spurred in 1901 by the founding of the Submarine Signal Co. in Boston and the development of...

A submarine communications cable is a cable laid on the seabed between land-based stations to carry telecommunication signals across stretches of ocean...

system defeated the German submarine campaign." A major contributing factor was the interception of German submarine radio signals and breaking of their code...

penetrate seawater to depths of hundreds of metres, allowing signals to be sent to submarines at their operating depths. Building an ELF transmitter is a...

Apparatus" – 1 May 1923 U.S. patent 1,472,558, "Directional Receiving of Submarine Signals" – 30 October 1923 U.S. patent 1,473,979, "Method for Eliminating...

submerged signal ejector is a device used by submarines, similar to a torpedo tube. Although, instead of deploying weapons, it launches signal flares, smokes...

carbon microphone as receiver, for the Submarine Signal Company. Submarine signals – Marine hazard signaling system Underwater acoustics – Study of the...

Submarine Detection by Sound. This led to the collaboration of the Submarine Signal Company, engaged in acoustic research and producer of submarine signals...

communicated by underwater bells as well as using the system for navigation. Submarine signals were at the time competitive with the primitive maritime radionavigation...

oscillator to generate sound waves. This was first installed by the Submarine Signal Company in 1924 on the M&M[clarification needed] liner SS Berkshire...

achieved the goal of transmitting quality audio signals, but the lack of any way to amplify the signals meant they were somewhat weak. On December 21,...

A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited...

Oscillation theory Spectral theory of ordinary differential equations Submarine signals "Charles-François Sturm | Number Theory, Geometry & Analysis | Britannica"...

arranged in an array so that it will add the signals from the desired direction while subtracting signals from other directions. The array may be steered...

radio signals or celestial sightings, it allows the boat to navigate while remaining hidden under the surface. To maintain accuracy, the submarine must...

Signals intelligence (SIGINT) is the act and field of intelligence-gathering by interception of signals, whether communications between people (communications...

Morro Castle was equipped with direction finding and submarine signalling equipment. Submarine signalling was becoming obsolete as a form of communication...

Indians". Science. ns-21 (539): 297–298. doi:10.1126/science.ns-21.539.297. ISSN 0036-8075. PMID 17796828. Patents Direction-finder for submarine signals...

signals, using an add-drop multiplexer to divide and recombine the signals on the desired paths, the reconverting back to optically carried signals....

strike, believing its submarine technology and tactics to be superior to the rest of the world. In theory, long-range submarines that can surface just...

nuclear-powered submarines includes the United States Navy's 14 ballistic missile submarines (SSBNs) and its 4 cruise missile submarines (SSGNs). Each displacing...

improving its signal-to-noise ratio, and hence the effectiveness of detecting and tracking faint contacts, such as quiet, low noise-emitting submarine threats...

Non-Directional Beacon (NDB) Racon Radio navigation Range light Sea mark Signal station Submarine signals Tactical Air Navigation (TACAN) VHF Omni-directional Range...

Virginia class, or the SSN-774 class, is a class of nuclear-powered attack submarine with cruise missile capability in service with the United States Navy...

ballistic-missile submarine that served in the Pacific Fleet of the Soviet Navy. It was one of six Project 629 strategic ballistic-missile submarines assigned...

10 June 2009. Barber, Mike (1 February 2008). "Navy's fast-attack submarine signals new mission in Pacific". Seattle Post-Intelligencer. Retrieved 10...

Skipjack-class nuclear-powered submarine that served in the United States Navy, the sixth vessel and second submarine to carry that name. Scorpion imploded...

as a result of meetings between Navy and the Submarine Signal Company, manufacturer of submarine signals as navigation aids and active in underwater acoustics...