Archive for July, 2018

Unmanned Underwater Vehicles

On July 3, 2018, the Kitsap Sun reported that Keyport, WA had become home to the Navy’s first unmanned undersea vehicle squadron. Keyport, WA has been home to much of the Navy’s research and testing facilities for many years. In fact, so many test torpedoes have been developed here that the town has earned the nickname “Torpedo Town, U.S.A. It only makes sense that this new development In the Navy’s forces would begin in Keyport. But what is an unmanned undersea vehicle or UUV’s. in the Kitsap Sun, Cmdr. Scott Smith called them “pre-programmed, small submarines.” However, these vehicles are much more complex and constantly changing the landscape of undersea defense as we know it.
In simple terms, a UUV is an underwater drone. They operate without a person being on board. They can be divided into two categories – ROV’s (remotely operated underwater vehicles) which are controlled by a remote operator and AUV’s (autonomous underwater vehicles) which operate on there on like a robot. In 2015, as the idea of these vehicles were still in the early test stages, Bryan McGrath, a managing director of The FerryBridge Group and assistant director of the Hudson Institute’s Center for American Seapower was asked about what these vehicles meant for the Navy’s Submarine Force. He went on to say the following:
“We’ve only begun to scratch the surface on the utility of UUV’s. I’m impressed with the degree to which the Navy’s Submarine Force is innovating in this area, and I’d like to see the surface force begin to work more closely with them to leverage what is quickly becoming a vast undersea information architecture. We will someday see UUV’s doing a great number of things that manned submarines currently do- not replacing them but extending their power and reach the way helicopters have for the surface force. Doubling down on our mystery of the undersea environment is a no-brainer.” 

Figure 1Knifefish Surface Mine Countermeasure Unmanned Underwater Vehicle (SMCM UUV)
(Picture: Bluefin Robotics) http://www.navyrecognition.com/index.php?option=com_content&view=article&id=3616

McGrath isn’t wrong when he says that working to understand the oceans is a no-brainer. While much of the ocean has been mapped, there is still plenty we are unaware of. As we saw in 2005 when the USS San Francisco hit an underwater sea mountain, having an extra pair of eyes in the deep black water doesn’t hurt. For the most part, UUV’s up until this point had been used for ocean surveillance and mine clearing. The new squadron in Keyport will utilize 10-inch torpedo-shaped tubes to large ones around 80 inches in diameter. The squadron will develop ideas and procedures that will shape how UUV’s can best be utilized by the Navy. According to Cmdr. Smith, while the UUV’s will be extremely helpful in reducing diver risks and sensory capabilities, they will never take away the vital importance of manned submarines. Despite the formation of this squadron and its growth over the past year, UUV’s are not currently deployed from submarines, something Smith sees changing in the next five years. Tests have been done using Virginia-class submarines to prove the viability of UUV’s in submarine missions. USS North Dakota, (SSN 784) which is homeported in Groton, finished a mission deploying and retrieving a UUV from the ship’s dry dock shelter in 2015. A dry dock shelter is a removable module that can be attached and allows ease of entering and exiting from a sub while it is submerged. The newly formed squadron is part of Submarine Development Squadron 5. This is the same command that oversees the Seawolf-class submarines- USS Seawolf, USS Connecticut, and USS Jimmy Carter.

Figure 2Dry-Dock Shelter open, the attack submarine Dallas (SSN-700), departs Souda harbor 19 July 2004, following a brief port visit. USN photo # N-0780F-070, courtesy of Paul Farley. http://www.navsource.org/archives/08/08700.htm

The biggest issue with UUV’s that make them different from their aerial counterparts that have been in use for years now is that due to the ocean’s depth, controlling the drone is difficult. Singles and Wi-Fi cannot reach the drone, meaning that the entire mission would have to be programmed into the vehicle before it is launched. Small UUV’s can gather surveillance and sea conditions. They can also extend the sensor reach of a submarine. Submarines rarely use active sonar in order to remain unseen. UUV’s would allow submarines the use of active sonar without giving away their location, essentially allowing the crew to be in two places at once. Rear Admiral Joseph Tofalo was quoted in 2015 as saying, “Now you are talking about a submarine CO who can essentially be in two places at the same time – with a UUV out deployed which can dull, dirty and dangerous type missions. This allows the submarine to be doing something else at the same time. UUVs can help us better meet our combatant command demand signal. Right now, we can only meet about two-thirds of our combatant commanders demand signals and having unmanned systems is a huge force multiplier.” The innovative work on how UUV’s can aid submarines and surface ships alike is taking place in Barb Hall, a building named after the World War II Gato-class submarine USS Barb. The USS Barb knows a thing or two about being the first of a kind- having been the first and only submarine to have “sunk” an enemy train when sailors snuck ashore and took out a Japanese supply train.
Viewpoints on UUVs vary and research is still ongoing to determine the long-term use of them to the submarine force. However, the tests done so far have shown significant reasoning for submarines to be equipped with the new technology. The fear that these vehicles would take away from the effectiveness and need for submarines is unfounded when you see how UUVs can make submarines a more stealth and formidable opponent to enemy forces.

https://www.kitsapsun.com/story/news/local/navy/2018/07/03/keyport-home-navy-first-underwater-drone-squadron/751928002/

http://nationalinterest.org/blog/the-buzz/the-us-navys-robotic-undersea-future-14239

https://thediplomat.com/2015/04/us-navy-to-deploy-underwater-drones-by-the-end-of-2015/

The Original Sea Devil Submarine

The Balao-class submarine SS-400 and Sturgeon-class submarine SSN-664 both have something in common. They are named The Sea Devil after the largest ray in the ocean. Known for its power and endurance, the name is, of course, fitting for some powerful pieces of machinery. But these submarines also share their name with another submarine that helped begin submarine development. The original Sea Devil is considered one of the groundbreaking early submarines.
Wilhelm Bauer was an engineer in Bavaria during the German/Danish war between 1848 and 1851. Fascinated by the Danish Navy’s ability to block the Prussians, Bauer began to study ship construction and hydraulics. He was inspired through his research to create a new type of submersible ship that would be better than those that had come before. His first construction was Brandtaucher or Incendiary Diver. At the time, in order to break blockades, ships with explosives were set adrift towards the blockading. Once the vessel would explode, it would either sink the blockading vessels or cause them to move. The ships that carried the explosives were called incendiary ships. Bauer took this idea and applied it to his first submarine. He believed that his submarine could attach an explosive to the underside of a blockading ship and break through that way. His design was about 28 feet long and weighed around 35 tons. Two sailors on a treadmill powered the vessel while a third would operate it. On February 1, 1851, his first public demonstration was a disaster. The submarine began to leak and ended up on the bottom of the harbor. For six hours, Bauer and the other two sailors had to wait for enough water to leak into the submarine to equalize pressure, so they could open the hatch and escape. The submarine itself would not escape the river until 1887. Despite the terrible first run, this did not stop Bauer.

Sketch of Brandtaucher https://www.thevintagenews.com/2016/06/28/constructed-1850-wilhelm-bauer-brandtaucher-first-submarine-project-germany/

Due to the failure of his first submarine, Bauer had difficulty finding patronage and a crew in Bavaria. Word had gotten out that while underwater, Bauer and his fellow crewmembers of his first craft had gotten into a physical fight over how to handle the situation. He had little success trying to find a sponsor in England. It was not until he traveled to Russia that he had some success. Tsar Alexander II funded the development of the next submarine- Le Diable Marin or the Sea Devil. This design was more advanced than her previous counterpart was. The Sea Devil was twice as large and could carry a crew of twelve. The same premises existed, with four men on a treadmill to power the vessel. After his previous incident, Bauer decided his new model would contain a lockout chamber. The Sea Devil carried out 134 successful dives, with some reaching a depth of 150 feet. The Tsar was so impressed that a four-piece orchestra was put onboard and played on board during a coronation from beneath the surface of Kronstad Harbor.

Drawing of the Sea Devil on the ocean floor. (Credit: ullstein bild/Getty Images)

When Le Diable Marin was first launched, it was described in the following manner: “The Russian submarine, ‘L.E. Diable Marin,’ resembled a dolphin in outward shape. It had a lent of 15m. 80. A beam of 3m. 80 and a depth of 3 m.35. The framework of the hull was of iron and the hull was credited with the power of resisting a 45 m. 50 column of water.…In the bows was a hatchway for entrance and exit. That the weight might be the more easily distributed, the forward part of the ship was 6 inches less in height than the middle portion. Pumps were used for forcing water into the cylinders, and longitudinal stability was obtained by reducing or augmenting the volume of water carried as ballast. In the bows was fixed a large mine, containing 500lb of powder and other combustible matter; on either side of this mine protruded a thick Indiarubber glove, to allow of fixing it to the keel of the vessel to be attacked. A door by which divers might descend to the bottom of the water was also provided, and this is not unnatural when one considers that Bauer’s very first submarine was intended for industrial purposes.” Unfortunately, this excess attention from the Tsar was not appreciated by the Russian admirals who devised a way to sabotage him. Bauer was ordered to do a demonstration and sink a dummy ship a distance away. However, the admirals misled Bauer on the exact depth of the river. While submerged, the Sea Devil hit a mudbank and became stuck. Bauer was forced to release the hatch and he and his crew were able to escape. However, just like his first vessel, the submarine was left on the bottom. This time, it is where the submarine would rest. This would be Bauer’s last attempt at submarine development.
Despite what many might view as a failure, Bauer greatly advanced submarine development. His work played a key role in advancing the science and engineering of future vessels. The successful dives of his second vessel proved the ability to successfully navigate underwater and with the four-piece orchestra from the Tsar’s coronation, proved it could be done comfortably. This original Sea Devil set the stage for those that came after. Just like the submarine’s namesake, Bauer had extreme endurance and fought hard for what he believed in. Today, Bauer’s first submarine that was rescued from the deep is on display in Dresden, Germany.

Figure 2 Brandtaucher on display at the Bundeswehr Military History Museum, Dresden https://www.thevintagenews.com/2016/06/28/constructed-1850-wilhelm-bauer-brandtaucher-first-submarine-

His name is also attached to the only German U-boat that is still floating today. Never used during the war due to its late production, The Wilhelm Bauer was originally scuttled after the war but rescued and refitted. In its second life, she served as a training vessel, shedding the connotation of her U-boat origins. Today she serves as a museum ship at the German Maritime Museum.

https://www.atlasobscura.com/places/wilhelm-bauer