First submarine – US Submarine http://us-submarine.com/ Mon, 13 Sep 2021 23:16:48 +0000 en-US hourly 1 https://wordpress.org/?v=5.8 http://us-submarine.com/wp-content/uploads/2021/07/icon-2021-07-28T233436.077-150x150.png First submarine – US Submarine http://us-submarine.com/ 32 32 South Korea tests first submarine-launched ballistic missile http://us-submarine.com/south-korea-tests-first-submarine-launched-ballistic-missile/ http://us-submarine.com/south-korea-tests-first-submarine-launched-ballistic-missile/#respond Tue, 07 Sep 2021 03:01:46 +0000 http://us-submarine.com/south-korea-tests-first-submarine-launched-ballistic-missile/ By Josh Smith SEOUL (Reuters) – South Korea has tested a ballistic missile (SLBM) from a submarine, the Yonhap news agency reported on Tuesday, becoming the first country without nuclear weapons to develop such a capability. A new Dosan Ahn Chang-ho submarine successfully completed the underwater ejection tests last week, after similar tests were carried […]]]>

By Josh Smith

SEOUL (Reuters) – South Korea has tested a ballistic missile (SLBM) from a submarine, the Yonhap news agency reported on Tuesday, becoming the first country without nuclear weapons to develop such a capability.

A new Dosan Ahn Chang-ho submarine successfully completed the underwater ejection tests last week, after similar tests were carried out from a submerged barge last month, Yonhap reported https: //en.yna.co.kr/view/AEN20210907001900325, citing unnamed military sources.

The Defense Ministry said it could not confirm details of the capabilities of individual military units for security reasons.

The Defense Development Agency made no comment and referred questions to the Defense Ministry.

Last week, the Defense Ministry released its defense plan for 2022-2026 which called for the development of new missiles https://www.reuters.com/world/skorea-says-it-is-developing-more- powerful-missiles-deter-nkorea -2021-09-02 “with considerably improved destructive power”.

SLBMs have been developed by seven other countries, including the United States, Russia, China, Great Britain, France, India, and North Korea. All of these countries also have arsenals of nuclear weapons, which have typically been used to arm SLBMs.

Yonhap said South Korea’s conventionally armed missile would have been codenamed Hyunmoo 4-4 and would be a variant of the country’s Hyunmoo-2B ballistic missile, with a flight range of around 500 kilometers (311 miles). .

South Korea has developed increasingly powerful missiles designed to target heavily fortified bunkers and tunnels in North Korea, as well as a way to reduce its military dependence on the stationed United States. thousands of soldiers on the peninsula.

Both Koreas cite military developments in the other as reasons to strengthen their capabilities.

North Korea has unveiled a slew of new SLBMs in recent years and appears to be building an operational submarine designed to transport them eventually.

(Reporting by Josh Smith. Additional reporting by Sangmi Cha; Editing by Michael Perry)


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It was the first submarine ever used in combat http://us-submarine.com/it-was-the-first-submarine-ever-used-in-combat/ http://us-submarine.com/it-was-the-first-submarine-ever-used-in-combat/#respond Mon, 21 Jun 2021 07:00:00 +0000 http://us-submarine.com/it-was-the-first-submarine-ever-used-in-combat/ Today’s naval warfare is both mind-boggling and frightening, especially when you consider the submarines. The United States alone has 18 submarines that are considered Ohio-class ships. In a nutshell, this means that each of these ships is capable of sending both nuclear weapons and submarine-launched ballistic missiles (SLBMs). Thanks to these capabilities, submarines have never […]]]>

Today’s naval warfare is both mind-boggling and frightening, especially when you consider the submarines. The United States alone has 18 submarines that are considered Ohio-class ships. In a nutshell, this means that each of these ships is capable of sending both nuclear weapons and submarine-launched ballistic missiles (SLBMs). Thanks to these capabilities, submarines have never been as deadly as they are today.

While today’s submarines are obviously very technologically advanced, there was a time when they were quite primitive. To put this in perspective, the first time a submarine was put into service for military fins was in 1775.

The ship in question was called the Turtle and was used by the United States Continental Army during the War of Independence to fight the British. As you might expect, this submarine was quite different from the ones we are used to today.

This is the story of the world’s first submarine that was officially used for military operations.

RELATED: These Are Chinese Nuclear Submarines Ready For WWII

Build the turtle

Bushnell Turtle

Via: Dive Master King, Wikimedia Commons – https://creativecommons.org/licenses/by/2.0

Towards the start of the American Revolution, an inventor by the name of David Bushnell recognized that the various American militias had extreme difficulty pushing back British ships. The reason for these problems was that the British Navy was at its peak when the conflict broke out; thus, it is quite difficult to win naval battles.

As a result of this, Bushnell decided that the best way to remove ships from Britain would be through stealth operations. In order to accomplish this momentous task, Bushnell pooled his expertise in underwater explosions and his limited knowledge of submarines.

The end result was an acorn-shaped submersible that (in practice) would be able to attach explosives to the hulls of England’s best ships. To build the experimental craft, Bushnell used two wooden hulls painted with tar and consolidated them with steel brackets. To operate the submarine warship, propellers and a hand pump were installed which allowed the submarine to rise and fall underwater.

The turtle’s mission

Turtle submarine

Via: Russ Glasson, Flickr – https://creativecommons.org/licenses/by-nc-sa/2.0/

In August 1776, after months of training and testing, Bushnell and an American general by the name of Samuel Holden Parsons decided it was time to put the Turtle into action. The target in question is said to be the HMS Eagle, considered by many to be the flagship of the British fleet in New York Harbor. The person who would pilot the submarine on its maiden voyage would be a soldier named Sgt. Ezra Lee.

Lee’s mission would be to approach the Eagle underwater and to the surface at the rear of the ship. Once there, Lee would screw the explosive into the ship’s hull and flee to safety. If all went according to plan, the explosives would sink the ship and seriously damage British morale.

RELATED: 15 Photos Of Massively Abandoned Submarines

The attack on HMS Eagle

On the night of September 6, 1776, Sgt. Lee went to the Eagle from the New York coast. It took him over 2 hours to reach his destination, which unfortunately left him only 20 minutes of oxygen to work. Due to the lack of time, Lee frantically attempted to screw the explosive into the hull to no avail.

While making another attempt on the side of the hull, Lee was spotted by soldiers who were stationed ashore. As English troops rowed to investigate, Lee lit the explosive fuse, threw it into the harbor, and escaped underwater. Although the explosive was detonated, no one was injured and no ship was damaged.

A month later, Lee made another attempt on another ship off the coast of Manhattan. This time around, however, he was spotted almost immediately; thus, forcing him to abandon the mission. A few days later, the British discovered the Turtle while on another mission and destroyed it.

RELATED: Here’s What Makes the USS Zumwalt Such a Dangerous Ship

Bushnell is responsible for today’s submarines

Submarine

Via: Stockvault, Pixabay – https://creativecommons.org/publicdomain/zero/1.0/

Despite the Turtle’s apparent failure, that didn’t stop George Washington from praising Bushnell’s design. Washington even called the Turtle a stroke of genius; although too many factors oppose it.

While Bushnell would never successfully sink a ship with a submarine throughout the American Revolution, it will continue to inspire future inventors like that of Robert Fulton and John Holland. Historians would also award him the title of “founder of modern submersible warfare.”

Over time, a number of powerful armies would eventually grow and add their own submarines to their naval fleets, all of which were inspired by Bushnell’s Turtle design. Today, even the most powerful nuclear-capable submarines owe Bushnell a big thank you. For without his revolutionary designs and ideas, the world’s combat-ready submarines would not be where they are today.

NEXT: Here Are Some Of The Weirdest Cold War Aircraft Designs


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USS Squalus and the first submarine rescue in U.S. history http://us-submarine.com/uss-squalus-and-the-first-submarine-rescue-in-u-s-history/ http://us-submarine.com/uss-squalus-and-the-first-submarine-rescue-in-u-s-history/#respond Sun, 23 May 2021 07:00:00 +0000 http://us-submarine.com/uss-squalus-and-the-first-submarine-rescue-in-u-s-history/ By 1939, the Navy had lost 851 men in submarine accidents and all submarine rescues had failed. But that would change with the USS Squalus. The Squalus (SS-192) was a diesel-electric submarine built at Portsmouth Shipyard and commissioned on March 1, 1939. The USS Squalus had performed well on 18 test dives and there were […]]]>

By 1939, the Navy had lost 851 men in submarine accidents and all submarine rescues had failed. But that would change with the USS Squalus.

The Squalus (SS-192) was a diesel-electric submarine built at Portsmouth Shipyard and commissioned on March 1, 1939.

The USS Squalus had performed well on 18 test dives and there were no issues for the 19th dive. Squalus left Portsmouth at 7:30 am on the morning of May 23. He then descended the Piscataqua River and passed four miles beyond the Isles of Shoals. USS Squalus commander Lt. Oliver Naquin had four officers, 51 enlisted men and three shipyard civilians for sea trials.

The fully equipped USS Squalus at Portsmouth Shipyard. (Office of Naval Research)

Disaster strikes USS Squalus

The USS Squalus was just off the Isle of Shoals at 8:40 a.m. Naquin had ordered the rigged boat to dive and the crew went to their posts. Everything went perfectly for the first time. The vessel plunged steeply and stabilized at 60 feet. Then, by combat phone, the engine room called the bridge, “Take her away!” “

The main air intake valve had not closed for reasons that were never discovered. Tons of seawater gushed out into the engine room aft of the ship. The men tried to close the intake valve and pumped oxygen into the ballast tanks in an attempt to lift the submarine. For a moment, Squalus slowly raised his nose. Then, as the men tried to shut off the leaks in the ventilation ducts, the pressure suddenly increased terribly. Torrents of seawater poured into the forward compartments, knocking down Harold Preble, the senior naval architect at Portsmouth Shipyard. Preble had been dating every new submarine for 22 years.

With water entering the battery compartment, Chief Electrician Lawrence Gainor shut down the batteries before they exploded or caught fire. The ship was plunged into darkness. The operating compartment was cordoned off just seconds before it was flooded. Eight men escaping from the crashing sea water managed to get through the watertight doors before they were sealed.

The submarine came to rest in 40 fathoms (240 feet) of water.

Experimental diving unit called into action

The Navy immediately informed the Experimental Diving Unit tasked with rescuing the downed submarines at the Washington Navy Yard. Lieutenant Commander Charles “Swede” Momsen in charge of the unit had developed a rescue diving bell which had not yet been tested. The Navy sent him and a team of divers to New England to attempt a rescue.

The Falcon minesweeper sent from New London, CT was to be the rescue vessel. The USS Squalus had sent a buoy on a cable with a telephone attached to mark its position. Lieutenant Naquin thought they could survive for 48 hours on the airwaves they had.

Momsen did so on a seaplane and landed just as a storm hit New Hampshire. The following rescue divers were forced to land in Newport, RI. With a police escort, they shouted as far as the coast, traveling so fast that they lost the police escort in Boston. They arrived at 4:15 am

At the bottom of the sea, Lt. Naquin remained optimistic for the shivering crew in the dark and cold submarine. He encouraged the men to take a nap and use as little oxygen as possible.

A drawing from the Boston Herald in 1939 illustrating the rescue operation.

What’s your problem, USS Squalus?

At 12.55 p.m. the Sculpin, the Squalus’ twin submarine, found its buoy then dropped anchor. The morale of the trapped submariners rose because they could hear the propellers above them.

Sculpin’s commanding officer, Lt. Warren Wilkin, called. “Hello, Squalus. It’s Sculpin. What is your problem ? “

LTJG Nichols responded, “Open high induction, crew compartment, before and after engine room flooding. Not sure of after torpedo room, but unable to establish communication with this compartment. Hold the phone and I’ll put the captain on.

Then Naquin went online. “Hello, Wilkin,” Naquin replied when suddenly the cable snapped.

Enlisted women approach the first submarine patrol

Read more : Enlisted women approach the first submarine patrol

The Falcon did not arrive with the diving bell until early the next morning, May 24. When it docked directly above the submarine shortly before 10 a.m., the sky had cleared and the sun was out.

A rescue diver descended 240 feet into the ink water to land just above the Squalus about three-four feet from where the diving bell was to attach to the escape hatch of the ‘crew. He stepped on the hatch to let the crew know he was there. The men enthusiastically knocked on the hatch in response.

It took 40 minutes to lower the cable that the diving bell would descend on and another 22 for the diver to attach to the Squalus escape hatch. The water pressure at this depth made the simplest tasks extremely difficult to accomplish.

Momsen and the other rescuers were about to try tactics that had never been used before.

“Where the hell are the towels?” “

At 11:30 am, the diving bell descended from the Falcon. It took him about 30 minutes to reach Squalus. Rescuers soon made a tight seal on the escape hatch. The two sailors from the diving bell opened the hatch and gave the crew of the USS Squalus a hot soup. The sailors, who never lack sardonic humor, ask: “Where the hell are the towels?”

The first seven men, considered the weakest by Naquin, are loaded into the bell. They surfaced just after 2 p.m. On the next trip, the sailors, knowing the unpredictable New England weather, thought about putting more sailors in the bell to speed things up. Shortly after 4:00 p.m., the bell resurfaced, this time carrying nine sailors. Nine other men arrived shortly before 6:30 p.m.

The fourth and final voyage loaded the last eight men, including Commander Naquin, into the bell. They started their ascent but around 8:15 p.m. at 160 feet the bell stopped. The wire was dirty so they had to cut it and let the bell go to the bottom where they would reattach a cable. Finally, the crew was able to lift the diving bell. This last trip lasted four and a half hours. The 33 survivors managed to reach the Falcon and safety.

A historic success

Thanks to the incredible courage and fearlessness of everyone involved, the operation was a success.

July 30, 1939, the Boston Symphony Orchestra, conducted by Arthur Fiedler, performed a memorial concert for the victims of the USS Squalus at Little Boar’s Head in North Hampton, NH. The concert was broadcast nationwide.

The bow of the Squalus breaks the surface of the water.
The bow of the Squalus surfaced when the Navy recovered it in September 1939. (US Navy)

For their actions during the operation, four officers and men would receive the Medal of Honor, 46 others decorated with the Navy Cross and one received the Distinguished Service Medal.

In September 1939, the Navy successfully lifted the USS Squalus from the ocean floor. He recovered the bodies of 25 of the 26 drowned sailors; a sailor had managed to get out of the submarine but never came to the surface. His body has never been found.

In 1940, the USS Squalus was returned to service as the USS Sailfish and served in World War II by sinking seven enemy ships. Its command turret resides in the Portsmouth Navy Shipyard as a memorial to sailors lost in action.

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Uganda obtains first submarine power cable connecting islands to grid http://us-submarine.com/uganda-obtains-first-submarine-power-cable-connecting-islands-to-grid/ http://us-submarine.com/uganda-obtains-first-submarine-power-cable-connecting-islands-to-grid/#respond Thu, 22 Oct 2020 07:00:00 +0000 http://us-submarine.com/uganda-obtains-first-submarine-power-cable-connecting-islands-to-grid/ Minister of State for Energy and Mineral Development Mary Gorret Kitutu Kalangala, Uganda | THE INDEPENDENT | The government has secured a 32 billion shillings loan to build a seven kilometer electric submarine cable connecting the Kalangala district (Ssese Islands) to the mainland at Masaka. The loan of 32 billion shillings was obtained from the […]]]>
Minister of State for Energy and Mineral Development Mary Gorret Kitutu

Kalangala, Uganda | THE INDEPENDENT | The government has secured a 32 billion shillings loan to build a seven kilometer electric submarine cable connecting the Kalangala district (Ssese Islands) to the mainland at Masaka.

The loan of 32 billion shillings was obtained from the African Development Bank to build the first electric submarine cable and connect it to the national grid.

The power cable that is to pass under the waters of Lake Victoria is expected to be completed within a year, according to contractors – CCC BEIJING INDUSTRIAL AND COMMERCIAL CO. LTD.

According to the Minister of State for Energy and Mineral Development, Mary Gorret Kitutu, the project aims to lower the tariffs charged for electricity in Kalangala.

Kalangala Infrastructure Services Limited, the company responsible for providing electricity on Buggala Island, charges over 825s per unit of electricity used. The minister says that is more than double the fees paid elsewhere in the country, so the cable will help lower the cost of doing business on the islands, economically empower the people of Kalangala and boost its tourism sector.

Kitutu appealed to entrepreneurs to consider local content in terms of employment opportunities.

Buggala Island currently uses solar power from Kalangala Infrastructure Services Limited, which residents say is rather expensive.

Patricia Litho, communications and community affairs manager at the Rural Electrification Agency, said the project was not intended to compete with Kalangala infrastructure services, but rather to expand reliable services to the Kalangala community. .

Marine life will not be affected nor aquatic life since the cable has a thick layer of insulation.

More than 1,142 households and 27 shopping centers in Kalangala district on Buggala Island will benefit from the project.

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URN


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The Burmese navy will acquire its first submarine, the Sindhuvir modernized by the INS http://us-submarine.com/the-burmese-navy-will-acquire-its-first-submarine-the-sindhuvir-modernized-by-the-ins/ http://us-submarine.com/the-burmese-navy-will-acquire-its-first-submarine-the-sindhuvir-modernized-by-the-ins/#respond Sat, 17 Oct 2020 07:00:00 +0000 http://us-submarine.com/the-burmese-navy-will-acquire-its-first-submarine-the-sindhuvir-modernized-by-the-ins/ Myanmar is ready to acquire its first diesel-electric submarine, with the Indian Navy handing over its modernized INS Sindhuvir to the country for training and operations. In what is seen as a major boost to regional military cooperation, New Delhi and Naypyidaw are also working on the supply of Indian field guns (105mm artillery guns), […]]]>

Myanmar is ready to acquire its first diesel-electric submarine, with the Indian Navy handing over its modernized INS Sindhuvir to the country for training and operations. In what is seen as a major boost to regional military cooperation, New Delhi and Naypyidaw are also working on the supply of Indian field guns (105mm artillery guns), ammunition, night vision devices and other military equipment.

Army Chief of Staff General MM Naravane and Foreign Minister Harsh Shringla visited Myanmar on October 4 and 5 to discuss enhanced cooperation. The two men had in-depth discussions with State Councilor Aung San Suu Kyi and Senior General Min Aung Hlaing, Commander-in-Chief of Myanmar Defense Services.

India and Myanmar are in talks for the supply of more military equipment, including 105mm artillery guns, ammunition, sonar and forward light “Shyena” torpedoes. The two countries are also working on more joint training and exercises to strengthen military cooperation between Indo-Myanmar.

“India will deliver one kilo INS Sindhuvir class submarine to the Burmese Navy. It will be the Burmese Navy’s first submarine. This is in line with our vision of SAGAR – Security and Growth for All in the Region, ”Foreign Ministry Spokesman for Foreign Affairs (MEA), Anurag Shrivastava, said.

India is working with Myanmar and Bangladesh to build and improve defense capabilities to counter China’s growing influence.

In the past, India has delivered to Myanmar maritime reconnaissance planes, patrol boats and ships, advanced torpedoes, radars, field guns and even small arms and ammunition. The renewed efforts can be seen as attempts to protect Myanmar from the clutches of China.

The Indian Navy is also working to train Burmese Navy personnel in submarine operations, not only at INS Satvahana in Vishakhapatnam, but also in Myanmar itself.

India and Myanmar share a 1,645 km long land and sea border. The two armies have also cooperated intensively in counterterrorism operations.

INS Sindhuvir entered service with the Indian Navy in 1988 and remained in service for almost three decades. The kilo-class submarine has undergone extensive modernization at the Hindustan Limited shipyard and is expected to remain in service with the Myanmar Navy for another decade and a half until around 2035.

The submarine should be used more for training purposes. Myanmar has also learned that it is purchasing two more submarines from China.


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India to give Burmese Navy its first submarine, the Kilo class INS Sindhuvir http://us-submarine.com/india-to-give-burmese-navy-its-first-submarine-the-kilo-class-ins-sindhuvir/ http://us-submarine.com/india-to-give-burmese-navy-its-first-submarine-the-kilo-class-ins-sindhuvir/#respond Fri, 16 Oct 2020 07:00:00 +0000 http://us-submarine.com/india-to-give-burmese-navy-its-first-submarine-the-kilo-class-ins-sindhuvir/ India will deliver a Kilo INS Sindhuvir class submarine to the Myanmar Navy as part of defense cooperation, ANI reported, citing officials on Thursday (October 15th). The announcement comes days after Foreign Secretary Harsh Shringla and Army Chief General Manoj Mukund Naravane visited Myanmar. According to reports, MEA spokesman Anurag Srivastava said maritime cooperation is […]]]>

India will deliver a Kilo INS Sindhuvir class submarine to the Myanmar Navy as part of defense cooperation, ANI reported, citing officials on Thursday (October 15th). The announcement comes days after Foreign Secretary Harsh Shringla and Army Chief General Manoj Mukund Naravane visited Myanmar.

According to reports, MEA spokesman Anurag Srivastava said maritime cooperation is an important part of India’s enhanced engagement with Myanmar and the submarine would be the first of the Myanmar. In addition, he also said that it was in line with India’s vision of SAGAR (Security and Growth for All in the Region) to strengthen self-reliance in neighboring states.

“In this context, India will deliver an INS Sindhuvir kilo class submarine to the Burmese Navy. We understand that this will be the Burmese Navy’s first submarine. This is in line with our vision of SAGAR-Security and Growth for All in the Region and also without commitment to build capacity and self-reliance in all our neighboring countries, ”Anurag Srivastava said at a press conference.

Read: India donates 3,000 vials of remdesivir to ‘friendly’ Myanmar to help fight COVID-19

Read: Army chief Naravane and Foreign Minister Shringla to visit Myanmar on Sunday

WHO welcomes India’s aid to Myanmar

Earlier this week, India was congratulated by a representative of the World Health Organization (WHO) for helping Myanmar with a donation of 3,000 vials of Remdesivir. WHO’s Dr Stephen Paul Jost praised India’s assistance to Myanmar and said it was greatly appreciated.

Indian Foreign Minister Harsh Vardhan Shringla, during his bilateral visit to Myanmar last week, handed over 3,000 vials of Remdesivir, an antiviral drug used in the treatment of patients with severe COVID-19, to the advisor of ‘State Aung San Suu Kyi.

In addition to delivering submarines and providing medical aid, India and Myanmar also signed a project agreement for the modernization of the agricultural mechanization substation in Rakhine State. The aim of the agreement is to address the challenges faced in agricultural productivity by making more efficient use of agricultural machinery and equipment, ultimately improving the socio-economic status of the people of Rakhine State.

Read: Myanmar-India Ink Project Agreement To Boost Rakhine State Development

Read: WHO praises India for helping Myanmar with 3,000 vials of antiviral drugs to fight COVID-19

Image: Twitter / IndiainMyanmar


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RAF’s first underwater fighter jet lands at new base in Scotland http://us-submarine.com/rafs-first-underwater-fighter-jet-lands-at-new-base-in-scotland/ http://us-submarine.com/rafs-first-underwater-fighter-jet-lands-at-new-base-in-scotland/#respond Wed, 14 Oct 2020 07:00:00 +0000 http://us-submarine.com/rafs-first-underwater-fighter-jet-lands-at-new-base-in-scotland/ The first Poseidon jet landed at RAF Lossiemouth in Moray eel . The plane – named the Town of Elgin – has parked outside a new £ 132million facility that houses the pilots, engineers and staff who will operate the high-powered submarine hunters technology. Nine Poseidon MRA1 aircraft have been ordered, the first of which […]]]>

The first Poseidon jet landed at RAF Lossiemouth in

Moray eel

.

The plane – named the Town of Elgin – has parked outside a new £ 132million facility that houses the pilots, engineers and staff who will operate the high-powered submarine hunters technology.

Nine Poseidon MRA1 aircraft have been ordered, the first of which first landed on UK soil in February 2020.

Since then, the crews have been securing the seas during operational missions.

Group Captain Chris Layden, RAF Lossiemouth Station Commander, said: “Today is a proud moment for Team Lossie, ushering in a new era for the station providing combat air power and operations maritime patrol over and around the UK.

“Yesterday I had the privilege of landing the first Typhoon on our newly remodeled runways, and today I had the pleasure of welcoming the first Poseidon to his permanent home in Moray.

“This is just the start of our expansion and modernization as one of the most strategically important RAF stations in the UK.”

Poseidon is a submarine hunter who can locate, identify and track potentially hostile ships when operating near British waters.

Its radar is also capable of detecting and tracking ships above waves.

The jets have a communications suite that allows the information they collect to be passed on to commanders whether they are in the air, on a ship, on the ground, or back to RAF Lossiemouth.

54 Squadron has trained new pilots and weapons systems operators on the platform, as an additional 400 personnel will travel to Moray to fly and operate the aircraft.

All Typhoon and Poseidon operations are due to return to their permanent home in Lossiemouth on Friday.


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Bolivia inaugurates its first fiber optic submarine network http://us-submarine.com/bolivia-inaugurates-its-first-fiber-optic-submarine-network/ http://us-submarine.com/bolivia-inaugurates-its-first-fiber-optic-submarine-network/#respond Tue, 08 Sep 2020 20:04:49 +0000 http://us-submarine.com/bolivia-inaugurates-its-first-fiber-optic-submarine-network/ Bolivia activated its first and only submarine fiber optic network, thereby gaining direct access to the World Wide Web and reducing its dependence on foreign wholesale telecommunications providers. The 2,200 km long cable network crosses the country’s main urban landscapes, including Tacna, Tarata, Mazocruz, Huaytire, Moquegua and Mollenda. Until now, Bolivian operators have borrowed telecommunications […]]]>

Bolivia activated its first and only submarine fiber optic network, thereby gaining direct access to the World Wide Web and reducing its dependence on foreign wholesale telecommunications providers.

The 2,200 km long cable network crosses the country’s main urban landscapes, including Tacna, Tarata, Mazocruz, Huaytire, Moquegua and Mollenda.

Until now, Bolivian operators have borrowed telecommunications capacity from wholesalers in neighboring Chile and Peru. Therefore, analysts believe that the cost of telecommunications services in the country could drop significantly in the coming months.

“Bolivia is entering the era of the fast and cheap internet,” said the country’s interim president, Jeanine ñez, after the inauguration.

The government has repeatedly said that the speed of the Internet will increase dramatically over the next few months. The internet download speed is on average 19.4 Mbps in Bolivia, according to the Ookla World Speedtest Index.

The cable network constructed at a cost of $ 66 million will be operated by the country’s public telecommunications company Entel. The project is in fact the brainchild of former president Evo Morales, who drafted a bill to declare Internet service a “human right”.

Cell phone and internet costs were disproportionately high in the country, according to Morales. “In 2007, a single Mbps cost an average of 672 bolivianos,” he recently tweeted.

“With nationalization, we have lowered the cost to 72 bolivianos (US $ 10) in 2017 and to 6.35 in 2019. The new cable network will further reduce the cost to 4.45,” he said.


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The bizarre tale of the death of the world’s first submarine in Plymouth Sound http://us-submarine.com/the-bizarre-tale-of-the-death-of-the-worlds-first-submarine-in-plymouth-sound/ http://us-submarine.com/the-bizarre-tale-of-the-death-of-the-worlds-first-submarine-in-plymouth-sound/#respond Sat, 06 Jun 2020 07:00:00 +0000 http://us-submarine.com/the-bizarre-tale-of-the-death-of-the-worlds-first-submarine-in-plymouth-sound/ Plymouth Sound has been the scene of epic moments in naval history and the starting point for many great voyages. But it was also the scene of a tragicomic episode of madness that resulted in the first recorded underwater death. Millwright John Day went to an aquatic grave in June 1774, lowered into a converted […]]]>

Plymouth Sound has been the scene of epic moments in naval history and the starting point for many great voyages.

But it was also the scene of a tragicomic episode of madness that resulted in the first recorded underwater death.

Millwright John Day went to an aquatic grave in June 1774, lowered into a converted wooden sloop called The Maria.

He descended into a weighted inner tube in civilian clothes, carrying a candle, water, a watch, and some cookies. It may even be the result of a bet gone wrong.

Day, from East Anglia, aimed to stay on the seabed 120 feet below Firestone Bay for 24 hours. It is likely that he only survived a few moments before the ship crashed.

Neither he nor Maria were ever seen again – despite an incredible rescue attempt a month later that somehow hoped to find him alive.

It shows how little was known about submarines at the time and even about the human body.

The identity of the first successful submarine worthy of the name is still shrouded in controversy and secrecy today.



An impression of what The Maria might have looked like as it descended through Plymouth Sound

Much of the information on John Day and The Maria comes from a pamphlet the following year, Nikolai Detlef Falck’s catchy title “A philosophical thesis on the diving vessel projected by Mr. Day and sunk in Plymouth Sound “.

But the little-known story still arouses interest nearly 250 years later.

Local marine exploration and research group the ‘SHIPS Project’ (‘Shipwrecks and History in Plymouth Strait‘) even worked with experts at the University of Birmingham to create external and internal 3D video and computer generated images of The Maria.

Little is known about Day’s origins, but Falck, in the publication held in the collection of the National Maritime Museums in Greenwich, said Day managed to stay six hours underwater in an old ship in East Anglia.

It secured financial support from Charles Blake to purchase a 50 ton sloop called The Maria, and fitted it to include a 12 foot by 9 foot by 8 foot “inner tube” for its single passenger.

The inner tube has been reinforced against water pressure with “solid stanchions” on all sides. The external ballast, made up of “twenty rough stones, each weighing a ton”, was attached to the underside of the ship by a rope. Locks at the front of the ship allowed water to enter.



An illustration from the brochure by Maria de Falck
An illustration from the brochure by Maria de Falck

Day was supposed to have loose bolts that would detach the Maria from the ballast and allow it to float to the surface.

The sinking was supposed to be secret, but crowds gathered to watch and a Royal Navy frigate was waiting. But all the spectators saw were a few bubbles moments after the ship descended.

According to marine archaeologist and submarine expert Pete Holt of Project SHIPS, Day found Player Blake in something called the Sporting Kalendar.

He added: “He was a crook. He found his backer in a gambling rag. He found someone to place a bet. This person obviously had nothing to lose other than his money.

“He messed up the shape of the thing, it was basically a square box. They didn’t really understand the pressure then, they didn’t really understand human anatomy.

“Falck thought he could find Day alive a month later in some sort of suspended animation. The ship would have imploded. Day wouldn’t have known.



Peter Holt of the SHIPS project
Peter Holt of the SHIPS project

Even though the ship survived, Pete said Day did not have enough air to survive the stay at the bottom of the sea. His candle would also consume oxygen, which was not discovered until the same year. .

But Pete said Day was a pioneer in certain areas, like using dropped weights to lift a submarine.

He pointed out that there was no way to test the submarine without a human being inside as it was impossible to lift the ship to the surface.

And Pete added that there were no Department of Defense police to shut down his business – and in fact, a Royal Navy frigate was on hand to help with the business.

He said that unlike the pioneers of railways or airplanes, the first successful submarine voyages were shrouded in secrecy.

The Marines fought in an arms race throughout the 19th century, so their experiences were kept under wraps.

Peter said, “It depends who you ask, if you ask the British, they invented the submarine, if you ask the Americans, it was them and so on.

He added that several attempts had been made to recover The Maria without success.

Peter said, “We know where he is. It’s in a shipping channel, but we don’t want everyone to know about it. Divers have probably swam it as there is very little to see.

“You would have to be a very muddy diver to find it. “


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Japan puts its first lithium-ion battery powered submarine into service http://us-submarine.com/japan-puts-its-first-lithium-ion-battery-powered-submarine-into-service/ http://us-submarine.com/japan-puts-its-first-lithium-ion-battery-powered-submarine-into-service/#respond Fri, 06 Mar 2020 08:00:00 +0000 http://us-submarine.com/japan-puts-its-first-lithium-ion-battery-powered-submarine-into-service/ MELBOURNE, Australia – The Japanese Maritime Self-Defense Force commissioned its first submarine using lithium-ion batteries on Thursday with the commissioning of the 11th Soryu-class boat. In a ceremony at the Mitsubishi Heavy Industries shipyard in the city of Kobe, authorities welcomed the diesel-electric attack submarine Ouryu, where it will be assigned to the 1st submarine […]]]>

MELBOURNE, Australia – The Japanese Maritime Self-Defense Force commissioned its first submarine using lithium-ion batteries on Thursday with the commissioning of the 11th Soryu-class boat.

In a ceremony at the Mitsubishi Heavy Industries shipyard in the city of Kobe, authorities welcomed the diesel-electric attack submarine Ouryu, where it will be assigned to the 1st submarine flotilla in the nearby port. by Kure.

The Ouryu is the sixth Soryu class boat to be built by MHI, Kawasaki Heavy Industries has built five more and built the 12th and last submarine of this type ordered by Japan. The Ouryu was launched in October 2018.

Ouryu and the last boat in its class, which will be christened Toryu, will be slightly different from the first boats in the class, as they will use lithium-ion batteries manufactured by GS Yuasa instead of Stirling cycle engines which recharge the lead-acid batteries. traditional for submerged operations.

Speaking at a presentation in 2017 in Singapore, former head of the Japanese Maritime Self-Defense Force’s submarine fleet, Vice Admiral Masao Kobayashi, said the batteries used in the Ouryu and the Toryu are lithium-nickel-cobalt-aluminum oxide batteries, or NCA. He said the technology requires less maintenance and is capable of greater endurance at high speeds when submerged compared to lead-acid batteries.

Other benefits cited by Kobayashi include shorter charging time and longer lifespan. The latter factor would mean that fewer battery changes are required over the life of the submarine.

However, he admitted that this is offset by higher acquisition costs due to the new technology, with the Ouryu costing the equivalent of $ 608 million in the contract compared to the cost of $ 488 million in the construction of the 10th Soryu class boat.

Japan introduced lithium-ion batteries in its submarines after a long period of development and testing, which began as early as 2002. Extensive testing began in 2006.

The Soryu class moves 2,900 tonnes above ground and 4,200 tonnes submerged, measuring just under 275 feet in length. Its top speed is 13 knots on the surface and 20 knots underwater. Each boat has a crew of 65, is equipped with six torpedo tubes, and can carry up to 30 21-inch heavy torpedoes, Harpoon anti-ship missiles, or mines.

After the Soryus, Japan will introduce a new class of submarines, which is currently only known as the 29SS, named Heisei 29, or the 29th year of the reign of former Emperor Akihito, which corresponds to year 2017 in the Gregorian calendar.


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