Category Archives: Acoustics & Sonar

Video – USS South Dakota SSN 790 will join the U.S. Navy submarine force in February 2019

Take a Tour of America’s Newest Nuclear Submarine Virginia class
USS South Dakota SSN 790 will join the U.S. Navy submarine force in February 2019

Overall Length: 377 ft
Extreme Beam: 33 ft
Max Navigational Draft: 32 ft
Full Displacement: 7800 tons

Hull Material: Steel hull, steel superstructure.
No. of Propellers: 1
Propulsion Type: Steam Turbine (Nuclear)
Accommodations: Officers: 15
Enlisted: 117
Total 132 people onbord
Video Link

Also see ATI’s submarines course.

This three-day course is designed for engineers in the field of submarine R&D and Operational Test and Evaluation. It is an introductory course presenting the fundamental philosophy of submarine design, submerged operation and combat system employment as they are managed by a battle-tested submarine organization that all-in-all make a US submarine a very cost-effective warship at sea—and under it.

Today’s US submarine tasking is discussed in consonance with the strategy and policy of the US, and the goals, objectives, mission, functions, tasks, responsibilities, and roles of the US Navy as they are so funded. Submarine warfare is analyzed referencing some calculations for a Benefits-to-Cost analysis, in that, Submarines Sink Ships!

From this course you will gain a better understanding of submarine warships being stealth-oriented, cost-effective combat systems at sea. Those who have worked with specific submarine sub-systems will find that this course will clarify the rationale and essence of their interface with one another. Attendees will receive copies of the presentation along with some relevant white papers.

What You Will Learn
Differences in submarine types (SSN/SSBN/ SSGN)
Submarine onboard organization and day to day operations
Basic Fundamentals of submarine systems and sensors
Submarine Mission profiles
Basics of Submarine Warfare tactical and operational control
How submarines support national military objectives
Makeup and function of the Submarine Support Enterprise
How the sea impacts submarine operations
Submarine Maintenance Cycles – Supporting the Tip of the Spear

Bombers and Subs and Missiles, oh my!

Speaking for myself, I always considered the nuclear triad to include bombers, submarines, and missiles, but, I was wrong. Sandra Erwin points out in her Space News article, we really need to remember that these three components of the triad could not be effective without two other complimentary components, a competent work force to operate them, and a modern and reliable Nuclear Command, Control and Communications ( NC3 ) network.

Lt. Gen Jack Weinstein, Air Force Deputy Chief of Staff for Strategic Deterrence and Nuclear Integration recently pointed out that nuclear modernization efforts cannot be strictly focused on subs, bombers, and missiles, but must also be concerned about modernizing the NC3 system, causing him to remark “The Triad also means space capability.” The Nuclear Posture Review reported that many of the components of the current NC3 system are antiquated technology which has not been modernized in almost 30 years. 

Sandra Erwin reports that the Air Force does have programs under way to modernize communications and early-warning satellites, but integration of these new systems will be very complex, and highly trained work force will be needed to build the systems.

Interestingly, Lt. Gen Weinstein has confidence in the military’s ability to train their people to operate these systems, but he expresses concern about educating the civilian workforce which will also need to be involved.

Applied Technology Institute (ATI) can play an important role in preparing the workforce which will support the future nuclear Triad since it offers a diverse collection of courses which cover all of the domains where the Triad will need to operate; air, sea, and space. Please consider looking at the current set of course offerings at ATI and consider taking some of our courses to better position yourself to make significant contributions to solving the complex problems associated with Strategic Deterrence in the future.  


Chinese Naval Plans for Subs and Carriers

Do your friends tell you that you surf the Internet too much, or do you tell others that they spend too much time surfing the Internet?

Well, it is lucky that someone was surfing, and had the foresight to grab some Chinese Documents during the brief period when they were available online. As reported in Popular Science on March 16, “For a brief moment, the China Shipbuilding Industry Corporation (CSIC), put online China’s next big naval projects (but quickly pulled them down).” Sure, some conspiracy theorists may claim this was nothing more than a clever way to spread disinformation, but to others, it represents a wealth of accidentally released information about “ China’s ambitions for a world class navy.” What do you think? The article explains that CSIC is a PLAN shipbuilder with a history of building Carriers and Submarines. It is believed that they will build the Type 095 Nuclear Attack Submarine. “The Type 095 SSN will include new noise reduction measures, like an integrated electric propulsion system and possibly a shaftless rim drive, single hull, and electronic noise cancellation.”
The Chinese continue to be concerned about area denial. The article describes that “To defend Chinese home waters and expand the anti-access/area denial umbrella underwater, CSIC is designing an underwater attack and defense system. It could likely be an armed variant of the “Underwater Great Wall” of UUVs, other maritime robots, and seafloor sensors.”

You can read the full article here…..

Or if you want to learn more about the concepts detailed in this article, consider taking an ATI course such as the following.
Submarines and Submariners

Virginia Class Attack Submarine (SSNs) Program Status and Shortfall Report to Congress

Summary of Congressional Research Service Report
The Navy has been procuring Virginia (SSN-774) class nuclear-powered attack submarines since FY1998. The two Virginia-class boats requested for procurement in FY2017 are to be the 25th and 26 th boats in the class. The 10 Virginia-class boats programmed for procurement in FY2014- FY2018 (two per year for five years) are being procured under a multiyear-procurement (MYP) contract.
From FY2025 to FY2036, the number of SSNs is projected to experience a dip or valley, reaching a minimum of 41 boats (i.e., 25 boats, or about 38%, less than the 66-boat force-level goal) in FY2029. This projected valley is a consequence of having procured a relatively small number of SSNs during the 1990s, in the early years of the post-Cold War era. Some observers are concerned that this projected valley in SSN force levels could lead to a period of heightened operational strain for the SSN force, and perhaps a period of weakened conventional deterrence against potential adversaries.
The Navy has been exploring options for mitigating the projected valley. Procuring additional Virginia-class boats in the near term is one of those options. In that connection, the Navy has expressed interest in procuring an additional Virginia-class boat in FY2021. Congress also has the option of funding the procurement of one or more additional Virginia-class boats in FY2018-FY2020.
For more information attend
Submarines and Submariners 19-Sep-17 21-Sep-18
Jim Jenkins, President

You decide – The Best Technical Training for You!



You can make a difference. Applied Technology Institute is scheduling new courses for September 2016 through July 2017. Please let us know which courses you would like to see on our schedule or brought to your facility.

·         If you have a group of 3 or more people, ATI can schedule an open enrollment course in your geographic area.

·         If you have a group of 8 or more, ATI can schedule a course on-site at your facility.

On-site training brings our experts to you — on your schedule, at your location. It also allows us to plan your training in advance and tailor classes directly to your needs.

You can help identify courses to suit your training needs and bring the best short courses to you! ATI courses can help you stay up-to-date with today’s rapidly changing technology.

Boost your career. Courses are led by world-class design experts. Learn from the proven best.

ATI courses by technical area:

Satellites & Space-Related courses

Acoustic & Sonar Engineering courses

Engineering & Data Analysis courses

Radar, Missiles and Combat Systems courses

Project Management and Systems Engineering courses


Contact us: or (410) 956-8805

Sign Up For ATI Courses eNewsletter

Raytheon Unveils New High-Tech Sonar System to Detect Submarines


Applied Technology Institute (ATICourses) offers a variety of courses on Acoustic & Sonar Engineering.

Raytheon reported that DARPA has received the prototype of a new underwater submarine detection system to be mounted on unmanned trimaran hulls.

The Pentagon’s Defense Advanced Research Projects Agency (DARPA) has received the prototype of a new underwater submarine detection system to be mounted on unmanned trimaran hulls, Raytheon said in a news release.

“Raytheon Company has completed delivery of its latest… fifth-generation hull-mounted sonar system, for… DARPA’s Anti-Submarine Warfare Continuous Trail Unmanned Vessel program,” the release, issued on Wednesday, stated.

A prototype trimaran built by Leidos is designed to serve as the program’s unmanned vehicle, Raytheon explained.

The Raytheon report followed published claims that Russia is apparently developing an underwater drone that will be able to inflict massive damage to coastal areas as part of a top secret project known as Ocean Multipurpose System: Status-6 carrying a torpedo equipped with a nuclear warhead.

This weaponized drone will be capable of causing “assured unacceptable damage” to an enemy by contaminating vast coastal areas, rendering them completely unusable for long periods of time, and will be able to bypass NATO’s missile defense system.

Sign Up For ATI Courses eNewsletter

China Threat: More Submarines Than US Navy

Applied Technology Institute (ATICourses) offers a variety of courses on Acoustic & Sonar Engineering as well as Radar, Defense, Missiles and Combat Systems.  The new below would be of interest to our readers.

China is building some “fairly amazing submarines” and now has more diesel- and nuclear-powered vessels than the United States.  China is also expanding the geographic areas of operation for its submarines, and their length of deployment.  For instance, China had carried out three deployments in the Indian Ocean, and had kept vessels out at sea for 95 days.

U.S. military officials in recent months have grown increasingly vocal about China’s military buildup and launched a major push to ensure that U.S. military technology stays ahead of rapid advances by China and Russia.

The quality of China’s submarines is reportedly lower than those built by the United States, but the size of its undersea fleet had now surpassed that of the U.S. fleet. A spokeswoman said the U.S. Navy had 71 commissioned U.S. submarines.  U.S. submarines are built by Huntington Ingalls Industries Inc. and General Dynamics Corp.

In its last annual report to Congress about China’s military and security developments, the Pentagon said China had 77 principal surface combatant ships, more than 60 submarines, 55 large and medium amphibious ships, and about 85 missile-equipped small combatants.

Read more here.

Sign Up For ATI Courses eNewsletter

U.S. Submarines To Be Upgraded With New Generation COTS Systems

SAN DIEGO (Feb. 6, 2015) The Los Angeles-class attack submarine USS Albuquerque (SSN 706) departs San Diego for a deployment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kyle Carlstrom/Released)

Applied Technology Institute (ATICourses) offers a variety of courses on Acoustic, Noise & Sonar Engineering.  The news below should be of interest to our readers.

COTS stands for commercial off-the-shelf stands for commercial items and available in the commercial marketplace that can be bought and used under government contract.  Motivations for using COTS components include hopes for reduction of overall system-development and costs (as components can be bought or licensed instead of being developed from scratch) and reduced long-term maintenance costs.

Now COTS computer equipment for sonar signal processing designed by General Dynamics Corp. will be introduced to to US Navy submarines.

A $47 million dollars were granted to the company to deliver Multipurpose Processor (MPP) engineering services and Total Ship Monitoring Systems (TSMS) for Ohio-class missile submarines as well as on Los Angeles-, Seawolf-, and Virginia-class fast attack submarines.  The goal of the Naval Sea Systems Command is to increase effectiveness of the following:

  • towed array
  • hull array
  • sphere array
  • sonar signal processing

The MPP is a multi-array interface receiver that provides signal conditioning for received array signals; data processing; digital formatting of data; beam formation; and signal processing for A-RCI display data.

The TSMS, meanwhile, monitors and localizes the submarine’s own noise sources including transients, so onboard sonar systems can compensate for it and improve its ability to detect and identify sound emissions from other submarines ad surface ships. The TSMS feeds its data to the MPP.

Sign Up For ATI Courses eNewsletter

Family affair in hunt for MH370

A 20-year-old “genius” electronic engineer and his father are among the crew searching for the missing Malaysian flight MH370.


Applied Technology Institute (ATIcourses) offers a variety of courses on Acoustic, Noise & Sonar Engineering.  The news below will be of interest to our readers.

When Jay Larsen, the chief engineer on MH370 search vessel GO Phoenix, needed a new technician, his 20-year-old son Kolter sprang to mind.

“He’s an electrical engineer genius and we asked him to come along,” he said.

“He’s been a very solid member. I’m proud of him.

“I don’t know that we can understand the weight of what we’re doing honestly.

“We’ve all experienced losses close to us and we’re out here trying our hardest.”

Jay and Kolter are key members of a search crew on board the GO Phoenix, a vessel scouring the Indian Ocean for the missing Malaysian Airlines Flight 370 (MH370), which disappeared March 8 while ferrying 239 passengers and crewmembers from Kuala Lumpur, Malaysia, to Beijing, China.

And while the Flathead Valley natives long to be home tracking elk sign through the wet November snow, the significance of their contribution to the search expedition isn’t lost on either of them.

For seven months, family members of the missing passengers and flight crew have been waiting for answers buried in a watery abyss, and Larsen hopes his highly specialized sonar technology can help bring them to light.

Jay Larsen owns the Whitefish-based deep-sea survey company Hydrospheric Solutions LLC (HSI), and, as chief engineer of the sonar kit that the ship is towing miles beneath the ocean surface, he has spent the last month mapping the undulating mountains and crevasses of the ocean floor, working round-the-clock to locate the missing flight in the remote southern Indian Ocean. His son, Kolter, an engineering student at Montana State University – Jay’s alma mater – joined the crew somewhat serendipitously as an electrical technician while taking a semester off college.

The sonar that HSI is towing 3.2 miles beneath the ship is called the SLH ProSAS-60, owned by SL Hydrospheric LLC, a company that Larsen still co-manages and co-founded in 2008 with the purpose of bringing the rarefied device to the deep-sea surveying market.

Read more here.

Sign Up For ATI Courses eNewsletter

NAVY’s Stealth Ship of the future: Zumwalt

Applied Technology Institute (ATI Courses) offers a variety of courses on Radar, Missiles & Combat Systems and  Acoustic, Noise & Sonar Engineering. The news about new NAVY’s stealth destroyer would be of great interest to our readers.

The US Navy’s newest and biggest toy is the imposing Zumwalt-class guided-missile destroyer, a svelte, stealthy entry designed to complement the Navy’s large fleet of Arleigh Burke-class DDGs.

Considering everything from its stealthy figure – which allows it to appear on radar as the same size as a fishing boat – to its 155-millimeter (six-inch) Advanced Gun System represents a significant leap forward in naval technology, it’d be impossible for us to recap all the significant features on this new ship.

Thankfully, Defense News has a really thorough and feature-laden story on the lead ship of the class, theUSS Zumwalt. Covering the ship from bow to stern, anything you might want to know (and that’s been released to the public) about this new destroyer can be found there. Head over and have a look!

Sign Up For ATI Courses eNewsletter