Since summer 2017, four vessels equipped with analog sonars have been upgraded using RTsys AS3i technology (Analog Surface Ship Sonar Improvement), which digitalized and improved the processing of signals rendered by sensors.
Brittany-based company RTSYS does not only deals with AUV, subsea recorders and buoys, but can also display a full range of sonar systems such as handheld devices for divers or sonar retrofit. The latter of which led the French SME to lately offer in summer 2017 its services to the French Navy by upgrading analogue sonars on four frigates.
In accordance with the ACORES public procurement program (a French acronym standing for Frigate Sonar Capacity Upgrade), RTSYS featured a reliable solution based on its SDA (Synchronous Data Acquisition) technological core to digitalize and process the signals received, without any modification on the existing transmitters and transducers.
This system has been installed on three Anti-Submarine Warfare Frigates FASM in Brest (Brittany, France) and on one Anti-Aircraft Frigate FAA based in Toulon by the Mediterranean French coast, thereby providing them with effective digital tools in order to avoid the costly replacement of the entire sonar system.
Improved signal processing significantly enhances reception especially thanks to the SDA motherboard running on all RTSYS products and providing very neat acoustic rendering. Thanks to signal digitalization, new User Interface is also to be displayed through HD color screens aiming to replace old analog ones. This intuitive Man-Machine Interface allows several screen configurations such as active or passive mode, torpedo mode, or PPI picture (Plan Position Indicator) and can accept multiples codes (Continuous Waves, Hyperbolic Frequency Modulation or Combo Mode). It is also to be noted that this upgrade increases bandwidth along with the duration of the pulse which gives crystal-clear signal at the reception and more specifically in the reverberation.
RTSYS project manager and ex-French Navy Commander Christian Nicolas said: “This is a smart system we developed as it works on various sides. First of all, it allows tremendous gain of time for Navies as the upgrade does not run for too long so the crew can quickly be back onboard. Secondly, the overall solution is cost-effective as we do not replace the HMS and VDS transducers; only receivers, processors, computers, monitors and operating consoles are. Finally, crews gain skills while training: data from previous missions are logged into the AS3i and can be set to replay mode. Thanks to the mission simulator, users can generate acoustic training simulations to meet requirements such as submarine or torpedo detection in either active or passive modes”.
In addition to signal improvement this upgrade means that the frigates sonars have new aptitudes such as the ability to extract objects and pursue them. Besides, an automatic torpedo detection system running as a background process emits warning signals based on simple detection criteria to attract the operator's attention. The operator nonetheless still decides whether or not to confirm an alert. Implementing the RTSYS solution will make these frigate sonars compatible with other digital measuring devices, so this will definitely enhance Navies’ onboard crew skills by letting them train more efficiently to Anti-Submarine Warfare and gain reactivity in case of troubles.
“This system is really easy and convenient to use and we provide constant technical support along with all necessary training to the crew so this technological upgrade goes really smoothly. After all this is what RTSYS partly does: improving training capacities such as we already do with our SEMA Training Target for Anti-Submarine Warfare,” Nicolas concludes.
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Balmoral Boltless Bend Restrictor Balmoral has extended its bend restric- tor range to include a genuinely boltless restrictor (patent pending). This innovation allows ? tting times to be slashed, offering savings in offshore installation costs. In line with Balmoral’s track record for prod- uct
Products Buoyancy DeepWater Buoyancy’s DeepWater Benthic Lander DeepWater Buoyancy claims to be components, there are also plastic, com- lander is free-fall deployed to the sea- the world’s largest supplier of subsea posite, polyurethane and fabricated met- ? oor to collects data. The product is buoyancy
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n Europe, where offshore turbines heavily dot maritime tween wind turbines. The spooling system can also be mount- maps, there’s acknowledged room for innovation in ed as a barge. turbine construction, support shipping and subsea. In- Spooled cable is custom “spun” like yarn from a ? xed or Istallations
The making of a (supply chain) star Wind is “the tech of choice,” the International Energy Agency said recently, just as a new report by the University of Delaware outlined the opportunity in U.S. of shore wind: 5,000 miles of of shore cabling and 1,700 turbines, it turns out, are bundled into current
AUV visuals: Swire Seabed’s user interface. Photo: Swire Seabed Norway has announced it will follow the Cooke Isles example of issuing licenses to quali? ed subsea mining companies. Ocean Minerals’ quali? ed offshore process involves low- ering pipe bound to nodule-harvesters on the seabed. Nod- ules
waii, underwater mining tools target the whole gamut of min- of major offshore acreage awards. Deepsea miner, Ocean ing support tasks. Minerals, says REEs are “17 chemically similar metals con- sisting of the 15 elements known as the lanthanides plus yt- High-stakes ops trium and scandium” and they’re of
by a vessel with moonpool. sensors (multiple cameras, laser-based light systems, multiple “EVA is used for real-time pit modeling and for assisting sonar types) in a versatile and highly maneuverable system. the underwater cutting operations providing visual and de- It was used successfully in a challenging
tenance activities, these are effectively hotel boats with a lot term we want to develop the HAUV track and survey buried of redundant time. We have developed HAUV to be able to be cables autonomously. Various pipe tracking technologies are deployed and recovered from these vessels essentially replac-
a “mow the lawn” style pre-programmed survey our eyes, defeated the object of the autonomous feature.” collecting multibeam echosounder (MBES), sidescan sonar So, Modus looked at Saab Seaeye’s Sabertooth. “It’s a cross (SSS) and sub-bottom pro? ler (SBP) data over about a 15-ki- between an ROV and an AUV
the right vehicle for the activities at a speci? c location, such as a supply vessel, dive support Modus were involved with. It came with a side scan sonar, but vessel or offshore renewables service vessel. The HAUV can customers wanted bathymetry and, like many AUV systems, it then perform inspection