What sonar device let Morse code messages be sent underwater from a submarine in 1915?


Top 10 Results

1Fessenden Oscillator

The device could also be used as an underwater telegraph, sending Morse code through the water. The Fessenden underwater signalling apparatus, or more usually just “The Fessenden”, was fitted to Royal Navy submarines in World War I. British K-series submarines were equipped with Fessenden oscillators starting in 1915.
https://en.m.wikipedia.org/wiki/Fessenden_oscillator

2Fessenden underwater signalling apparatus
The Submarine Signal Company, was established in Boston, Massachusetts, to turn the research into a navigational aid. The company developed, patented and began manufacturing electromechanical bell signals and shipboard receivers based on previous research introducing the world’s first electronic, underwater acoustic navigation aid in 1901.
https://en.wikipedia.org/wiki/Submarine_signal

3Fessenden underwater signalling apparatus
The device could also be used as an underwater telegraph, sending Morse code through the water. The Fessenden underwater signalling apparatus, or more usually just “The Fessenden”, was fitted to Royal Navy submarines in World War I. [3] British K-series submarines were equipped with Fessenden oscillators starting in 1915.
https://wikimili.com/en/Fessenden_oscillator

4Fessenden Oscillator

The device could also be used as an underwater telegraph, sending Morse code through the water. The Fessenden underwater signalling apparatus, or more usually just “The Fessenden”, was fitted to Royal Navy submarines in World War I. British K-series submarines were equipped with Fessenden oscillators starting in 1915.
https://military.wikia.org/wiki/Fessenden_oscillator

5Fessenden underwater signalling apparatus
The device could also be used as an underwater telegraph, sending Morse code through the water. The Fessenden underwater signalling apparatus, or more usually just “The Fessenden”, was fitted to Royal Navy submarines in World War I.[3] British K-series submarines were equipped with Fessenden oscillators starting in 1915.
https://what.youwacom.ma/2017/02/21/what-sonar-device-let-morse-code-messages-be-sent-underwater-from-a-submarine-in-1915-2017/

6Fessenden underwater signalling apparatus
The First Practical Uses of Underwater Acoustics: The Early 1900s Demonstrating listening device, very similar to a telephone, used on board ships with submarine signaling apparatus. In: “Submarine Signaling,” Scientific American Supplement, No. 2071, pp. 168-170, Sept. 11, 1915.
https://dosits.org/people-and-sound/history-of-underwater-acoustics/the-first-practical-uses-of-underwater-acoustics-the-early-1900s/

7Diving equipment

Diving equipment is equipment used by underwater divers to make diving activities possible, easier, safer and/or more comfortable. This may be equipment primarily intended for this purpose, or equipment intended for other purposes which is found to be suitable for diving use.
https://en.m.wikipedia.org/wiki/Diving_equipment

8Reginald Fessenden

Reginald Fessenden’s Deluged … The Navy took his mind seriously and after the Brant Rock days he was off to Boston and Underwater Signaling and now Sub Bases New London and Bangor etc. are as a … Receiving apparatus at the time Professor Fessenden began his work was in an …
http://www.radiocom.net/Fessenden/

9Fessenden underwater signalling apparatus
Fessenden’s underwater ice finder In 1913, Reginald Fessenden reshaped the maritime industry through his invention of the Fessenden Oscillator. This electromechanical device allowed ships to send underwater telegraph signals and deploy underwater echo ranging.
https://ethw.org/Fessenden’s_underwater_ice_finder

10Fessenden underwater signalling apparatus
He then founded his own company in Montréal, continuing to carrying out numerous endeavors for several years. He deposited, in fact, over 500 patents under his name, and was involved in many legal battles. He is especially remembered for the invention of an acoustic apparatus (which bears his name) for underwater signaling.
https://www.fgm.it/en/marconi-en/profiles/reginald-fessenden.html

News results

1Vikings’ lost possessions mark a long-hidden early trade route
Exceptionally well-preserved clothing — and even horse dung — line a path that travellers trod for more than 700 years.
https://www.nature.com/articles/d41586-020-01097-y
Published Date: 2020-04-16T08:00:00.0000000Z

2Lemurs’ love language is fragrance
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3Editorial Calendar – Metro Rail News Magazine
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https://www.metrorailnews.in/metro-rail-news-magazine-editorial-calendar/
Published Date: 2020-04-17T17:18:00.0000000Z

4Inside Imperial Japan’s Suicide Raid on Sydney Harbor
Until May, almost everything had gone in favor of Imperial Japan. In that month the Japanese were stalemated at the Battle of the Coral Sea. If the Japanese Navy had succeeded in capturing Port Moresby at the southeastern tip of the island of New Guinea,
https://nationalinterest.org/blog/buzz/inside-imperial-japans-suicide-raid-sydney-harbor-145547
Published Date: 2020-04-18T21:52:00.0000000Z

BING based on video search results

1  Underwater Video Equipment
My earliest underwater equipment was homemade consisting of a modified kitchen flour canister with a thick glass lens held in place with silicon seal. Electricians tape was wound around the cap to keep it watertight. It was in a carriage weighted down with scrap iron on a pole about five feet long. It allowed me some measure of control while …
Watch Video: https://www.youtube.com/watch?v=gKcyu0Erg6w

Wikipedia Search Results

1.  Fessenden oscillator
an underwater telegraph, sending Morse code through the water. The Fessenden underwater signalling apparatus, or more usually just "The Fessenden", was…
https://en.wikipedia.org/wiki/Fessenden oscillator

2.  Reginald Fessenden
Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-born inventor, who did a majority of his work in the United States and also…
https://en.wikipedia.org/wiki/Reginald Fessenden

3.  Sonar
on the Grand Banks off Newfoundland. In that test, Fessenden demonstrated depth sounding, underwater communications (Morse code) and echo ranging (detecting…
https://en.wikipedia.org/wiki/Sonar

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