Subnero and HydroSurv Collaborate on Autonomous Subsea Data Operations for Persistent Ocean Monitoring

Mon, 08 Jun 2026 00:00:00 +0000

Singapore, (8th June 2026)

Subnero Pte Ltd., a leader in underwater wireless communication and networking solutions, today announced a collaboration with HydroSurv, a UK-based designer and operator of uncrewed surface vessels (USVs), to demonstrate an autonomous subsea connectivity layer for persistent offshore and ocean monitoring programmes.

The integrated solution combines HydroSurv’s battery-electric and battery-hybrid USVs with Subnero’s Acoustic Smart Modems and underwater networking software. Seabed landers fitted with industry-standard sensors such as ADCPs, CTDs and pressure sensors can communicate acoustically with a Subnero modem on board the USV, enabling data retrieval, remote configuration, status updates and onward relay over satellite or cellular backhaul to the user’s cloud endpoint or operations center.

The result is a practical new operating model for long-term subsea monitoring: seabed assets stay deployed for longer, data can move more frequently, and operators can reduce reliance on routine crewed vessel mobilization and lander recovery cycles.

Edge processing on Subnero Acoustic Smart Modems can filter, package and prioritize sensor data before transmission, helping users receive mission-relevant information that is ready to flow into their own analytics, models and decision workflows.

“Long-term subsea monitoring has historically been constrained by the cost, risk and delay of sending vessels offshore to retrieve data. Together with HydroSurv, we are showing how autonomous surface platforms and intelligent underwater communications can create a new operating model: one where seabed assets remain deployed, data moves more frequently, and operators can interact with subsea systems without routine recovery campaigns.” — Manu Ignatius (CEO, Subnero)

“HydroSurv are pleased to be working with SubNero to integrate their acoustic modem technology with our USV platforms to support lower-footprint subsea data harvesting. Following a visit to the team in Singapore and the successful integration of the first modem this month, we now have a strong foundation for trials and evaluation over the summer. We look forward to exploring how the capability can support reliable subsea data transfer and enable monitoring campaigns that have previously been uneconomic or operationally challenging.” — David Hull (CEO, HydroSurv)

The solution is already being applied across multiple regions and use cases, including seagrass habitat monitoring, bathymetric survey support and tide gauge data collection. Each deployment hardens the technology against real ocean conditions and broadens the catalogue of sensors, mission profiles and environments the platform can support.

For offshore wind, oil and gas, ocean science, environmental monitoring and critical subsea infrastructure programmes, the collaboration points to a future in which persistent subsea assets can be monitored and interacted with more regularly, with fewer offshore interventions and faster access to operational data.

About HydroSurv

HydroSurv is a global innovator in Uncrewed Surface Vessel (USV) technology, specialising in low-impact platforms for marine survey and environmental monitoring. Based in Exeter, UK, the company develops and deploys advanced solutions for coastal and offshore applications worldwide, with a focus on sustainable marine operations and high-quality data acquisition. For more information, visit www.hydro-surv.com.

About Subnero

Subnero develops underwater communication, networking and edge-intelligence technologies that help connect subsea assets, autonomous platforms and customer systems. Through its Acoustic Smart Modem platform and UnetStack networking software, Subnero enables data exchange, remote interaction and scalable underwater connectivity across defense, offshore energy, marine, subsea and scientific applications. For more information, visit subnero.com.

Read HydroSurv’s announcement here.

Media Contact: media@subnero.com

The most important infrastructure of the digital age sits out of sight, on the seabed.

Sat, 30 May 2026 00:00:00 +0000

At the Shangri-La Dialogue, the launch of the Guiding Principles for Underwater Infrastructure Defence Exchanges (GUIDE) marked a shift in how the world treats the ocean floor. Subsea cables and energy links are no longer viewed only as engineering projects to be built and maintained. They are now recognised as pillars of national resilience, regional security and digital sovereignty. Consider the dependence. Close to 95 percent of the world’s internet and data traffic travels through subsea cables. Despite that, the space these cables run through stays one of the hardest places to observe, to communicate within and to act on quickly, and the difficulty only grows once you move past territorial waters.

That gap is exactly what needs to be closed next.

Securing this infrastructure cannot rely on watching the surface and sending repair teams once the damage is done. It calls for constant awareness underwater, communication systems that work across different platforms, a fast path from detection to response, and divers, sensors, autonomous vehicles and command teams that can function together as a single subsea network rather than as isolated parts.

Subnero Underwater Network

This is the problem Subnero has focused on for years. We develop software defined underwater communication and networking technology that makes the underwater environment more connected, more visible and more responsive to what is happening within it. GUIDE arrives at the right moment for deeper international cooperation. The harder work begins now, in translating shared principles into capability that holds up in the field, across defence, maritime, energy, telecommunications and autonomous operations.

Resilience for critical infrastructure will not be decided above the waterline alone. It will come down to whether we can sense, communicate and coordinate beneath it.

One Modem, Two Jobs - Communication and Tracking from the Same Hardware

Fri, 24 Apr 2026 00:00:00 +0000

For many subsea operators, acoustic communication and underwater positioning have traditionally relied on two separate systems, two sets of hardware on the deployment frame, and two lines on the budget. But what if the modem you already use to talk to your AUV could also tell you exactly where it is?

In a new post on the Unet Blog, we show how a multi-receiver acoustic modem running UnetStack can be converted into a fully functional Ultra-Short Baseline (USBL) transceiver with only two minor additions: a rigid scaffold for the hydrophones and a short script running on your laptop. Because the hardware requirements for spatial-diversity communication and for USBL localization are almost identical, the same Subnero multi-receiver modem can serve both roles at once.

A Subnero multi-receiver modem mounted on a 3D-printed tetrahedral frame, ready to operate as a bottom mounted USBL transceiver.

Setting up the transceiver How to arrange the transducer and three hydrophones into a tetrahedral geometry, capture their precise positions, and launch the helper script from the unet-contrib repository to get range, bearing, and peer-location notifications on the Unet shell.
Estimating the range How UnetStack’s built-in preamble detection and the range() command turn an interrogation–response exchange between transceiver and transponder into a clean time-of-flight measurement.
Estimating the bearing How small differences in arrival times across the four receiving channels, combined with the known receiver geometry, yield a direction-of-arrival vector and how an earliest-peak correlation strategy with subsampling makes the arrival-time estimates robust against echoes and reflections.
Testing without getting wet How to use the VirtualAcousticOcean integration to run the entire USBL workflow in simulation, so you can develop and debug on a lab bench before heading offshore.

This is essentially a modern USBL system approached from the other side: instead of a tracking unit that adds basic communication, you get a high-performance communication modem that adds tracking, with all the openness and extensibility of UnetStack underneath.

Read the full post here:

Turning a Multi-Receiver Modem into a USBL Transceiver.

RTS Enhances Subsea Connectivity for Cube Systems with Subnero Smart Modems

Fri, 06 Mar 2026 00:00:00 +0000

Singapore, 7 March 2026 — RTS – Rental Technology & Services, a premier global supplier of subsea measurement solutions, and Subnero today announced the successful integration of Subnero’s M25M acoustic smart modems into the RTS Cube system. This collaboration significantly enhances real-time underwater communication and operational flexibility between subsea structures and topside assets.

For over a decade, RTS Cube systems have provided operators with critical real-time deflection, tilt, and attitude data from underwater structures. As parts of the hardware approached end-of-life, RTS sought to enhance the platform’s performance and future readiness. Seeking a more robust acoustic communication partner, RTS conducted rigorous testing of Subnero’s M25M modems, built on the highly flexible UnetStack software-defined networking framework.

“We did a thorough test before integrating the new Subnero modems into our Cube systems,” said Ivar Ersland, Development Manager at RTS. “The results showed significantly greater range and higher data rates compared to our existing solutions. In addition, the expanded functionality of the Subnero modems strengthens RTS’s ability to deliver customized sensor packages for deployment in remote locations.”

Thanks to close collaboration between RTS and Subnero, the integration and testing phases were completed efficiently, leading to smooth operational validation. Multiple offshore deployments have been successfully completed to date. This transition has verified the modems as a robust and reliable solution, ultimately reducing operational turnaround time while improving the flexibility, safety, and long-term maintainability of the Cube systems.

This partnership strengthens RTS’s position as an innovator in subsea instrumentation, combining proven field experience with Subnero’s software-defined technology to deliver smarter, safer, and more connected subsea solutions.

About RTS (Rental Technology & Services)
Headquartered in Karmøy, Norway, RTS is a premier supplier and rental company serving the global subsea industry. Established as a trusted partner in the North Sea region, RTS provides high-quality equipment and turnkey solutions for offshore survey and subsea construction operations, developing proprietary products like the RTS Cube to meet demanding project requirements worldwide.

About Subnero
Subnero is driving the future of underwater wireless communications by building the Internet of the Oceans. Through its high-performance, software-defined acoustic smart modems and the UnetStack networking framework, Subnero provides seamless, scalable, and reliable connectivity for autonomous underwater vehicles (AUVs), sensors, and subsea infrastructure.

To learn more about this integration, click here or download the PDF here.

Bridging the Subsea Data Gap - Field Results from the SWIS ADCP Edition Deployment

Fri, 27 Feb 2026 00:00:00 +0000

As ocean observation needs evolve, the challenge remains: how to retrieve high-fidelity seabed data without the high costs of cabled or physical recovery?

At Oceanology International 2026, Subnero’s Amy Gibson will be presenting results from a recent field study, titled Toward Autonomous Ocean Observation: Field Results from a SWIS-ADCP Deployment.

The study details a deployment at a buoy station near Pulau Ubin, Singapore. The team evaluated the Subnero Wireless Integrated Suite (SWIS) - ADCP Edition integrated with a Nortek Aquadopp Profiler to test both user-triggered and autonomous periodic data acquisition from the seabed-deployed ADCP.

MESN Buoy

Why SWIS - ADCP Edition?

The field results highlight the advantages of SWIS - ADCP Edition for environmental monitoring deployments. The key points covered include:

Autonomous Operation: Capable of autonomous periodic data acquisition.
On-Demand Retrieval: Enables user-triggered acoustic retrieval of sensor data.
Seamless Integration: Proven integration with industry-standard sensors like the Nortek Aquadopp Profiler.

Join us at OI 2026

We invite you to join the session to dive into the data:

Session: Ocean Observation – Autonomous & Mobile Ocean Observing Systems
Date: 10 March 2026
Time: 12.40
Location: South Gallery Room 7 & 8

Visiting the exhibition? See the system in action at the Subnero stand at A103.

Transforming Underwater Research – New Case Study with the Underwater Acoustic & Navigation Lab (ANL)

Mon, 23 Feb 2026 00:00:00 +0000

Singapore, February 23, 2026 – Subnero Pte Ltd., a leader in underwater wireless communication solutions, today announced the release of a new case study showcasing how its software-defined acoustic smart modems are empowering cutting-edge marine research in collaboration with the Underwater Acoustic & Navigation Lab (ANL).

The newly published case study highlights how researchers, led by Dr. Roee Diamant, utilized Subnero modems to bypass the closed architectures of traditional commercial acoustic systems. By leveraging Subnero’s open, software-defined platform, the ANL team successfully implemented multiple advanced sensing applications such as midwater Doppler motion estimation, lab-grade transducer characterization, and 3D biological tracking using active and passive sonar techniques without the need for expensive, time-consuming custom hardware development.

Subnero platform’s features such as direct access to raw passband and baseband streaming, multiple receiving channels, onboard processing via an integrated Jetson Orin coprocessor enabled researchers to run complex, Python-based algorithms directly on the device.

“The open architecture of the Subnero modem allowed us to treat the device not just as a communication tool, but as a fully programmable underwater laboratory,” said Dr. Roee Diamant, Head of the Underwater Acoustic & Navigation Lab (ANL). “By accessing raw data and running our own code directly on the modem, we could bypass any hardware development and focus immediately on validating our algorithms in the open sea.”

This successful deployment aligns perfectly with Subnero’s mission to foster technological advancement beneath the surface.

“Our goal at Subnero has always been to provide more than just a reliable communication link; we strive to offer a truly flexible platform that accelerates innovation,” said Manu Ignatius, CEO of Subnero. “Seeing the Underwater Acoustic & Navigation Lab utilize our edge-computing capabilities and open interfaces to achieve such remarkable research milestones is a testament to the power of software-defined underwater architecture.”

Ultimately, this case study underlines how Subnero’s technology is supporting a new era of marine science, allowing researchers to rapidly transition from hypothesis to real-world validation.

The full case study, titled Transforming Underwater Research – How Flexible, Software‐Defined Modems Empower Cutting‐Edge Research, is available here.

About Subnero

Subnero develops underwater communication and networking technologies that aim to make underwater connectivity as seamless and scalable as connectivity on land. Through its acoustic smart modem platform and network intelligence systems, Subnero is advancing the Internet of the Oceans.

The Underwater Acoustic & Navigation Lab (ANL) is a globally recognized research group specializing in underwater acoustics, navigation, and marine sensing. Their work spans advanced sonar methods, autonomous tracking, and multi‐target detection in complex underwater environments.

Building Connectivity with Confidence for Subsea Robotics

Thu, 08 Jan 2026 00:00:00 +0000

For many subsea robotics developers, acoustic communication has often been viewed as a fragile necessity—something that is “nice to have” but rarely trusted to “just work.” We believe it is time to close the gap between skepticism and reliability.

In a new two-part series on the Unet Blog, we break down exactly how to move from uncertain links to robust, mission-critical connectivity. Based on real-world deployments, this series offers a practical roadmap for AUV operators and engineers. It guides you through five levels of confidence, ensuring your vehicle’s acoustic link is dependable enough to provide reliable connectivity.

The 5-level framework for moving from basic technology choices to fully adaptive, mission-critical underwater connectivity.

Part 1: The Foundations We cover the essential “don’ts and do’s” of acoustic systems, focusing on smart Technology Choices, rigorous Integration Hygiene (mechanical, electrical, and software), and effective Deployment Planning to avoid common environmental traps.
Part 2: The Advanced Edge We explore how to make your systems more aware through Adaptive Communication Links that adjust modulation in real-time and Adaptive Command & Control, where the vehicle proactively changes behavior to maintain connectivity.

Whether you are designing a new AUV or looking to improve the reliability of your current fleet, this series provides the technical insights needed to make acoustics work for you, not against you.

Read the full series here:

Internet of the Oceans – A Connected Ocean Begins in Singapore with Underwater Cellular Network Launch

Thu, 11 Dec 2025 00:00:00 +0000

Singapore, December 11, 2025 – Subnero Pte Ltd. today announced a breakthrough milestone for global maritime technology. The company has successfully deployed and demonstrated an underwater cellular network in Singapore waters, delivered in partnership with ST Engineering Unmanned & Integrated Systems (ST UIS).. It represents one of the world’s earliest commercial implementations of a subsea network designed to provide continuous coverage, seamless mobility and real time tracking for subsea assets. This work forms the foundation of what Subnero calls the Internet of the Oceans.

With the acceleration in offshore energy exploration and operations, in-water robotics, defence operations and ocean research, the need for a reliable, scalable and mobile underwater communication fabric is becoming critical. Traditional underwater acoustic systems have been limited to short distances or point-to-point links. This deployment shows that underwater networks can now behave like terrestrial cellular systems and support multiple mobile and stationary assets as they move through the mission area, enabling the next wave of scale in traditionally complex subsea operations.

Bringing Terrestrial Cellular Network Principles to the Depths

The deployment consisted of three buoy-mounted Subnero M25M-series smart modems that acted as subsea base stations. Each buoy created a ‘cell’ with planned overlap, similar to traditional terrestrial radio network planning. Autonomous Underwater Vehicles (AUVs) and underwater sensors equipped with Subnero M25M-series modems for communications were able to remain connected while moving between the cells. The network supported two-way communication, command and control messaging, telemetry exchange and real time localization and tracking – exhibiting terrestrial mobile network principles, applied underwater.

Key Technical Outcomes

Across multiple trials, the network delivered three major results.

Continuous Communication Assets maintained uninterrupted links while transitioning between coverage zones. This mirrors how mobile devices switch between terrestrial towers.
Continuous Tracking and Situational Awareness Real time positional updates were available whenever assets were covered by multiple base stations, similar to multi-point localization techniques used in terrestrial networks. This allows safer and more coordinated underwater operations.
Scalable and Flexible Architecture The system demonstrated that adding more base stations naturally extends coverage and capacity. This enables large scale subsea communication grids across ports, naval bases, offshore installations and research zones.

Unlocking New Possibilities for the Subsea Economy

The deployment represents a significant step toward a connected ocean. AUVs, divers, long duration sensors and marine robots can now operate within a shared, persistent and intelligent communication fabric.

A First Look at the Internet of the Oceans: Why It Matters

This type of network has never been deployed at commercial scale in Asia, and it positions Singapore as a global pioneer in connected-ocean infrastructure. Singapore becomes one of the first countries to operate an underwater communication system with cellular style behaviour. This positions the region as an innovation hub for the next wave of ocean technology and autonomous maritime systems.

The full case study, titled A Connected Ocean: Underwater Cellular Network Demonstrates the Future of Subsea Communications., is available here.

About Subnero

About ST Engineering Unmanned and Integrated Systems

ST Engineering is a global technology, defence, and engineering group providing innovative solutions across aerospace, smart city, and digital systems domains. Through its Unmanned & Integrated Systems business, the company develops advanced communication and autonomous technologies that enhance connectivity and mission effectiveness in complex environments.

“Oceans cover 70 percent of the planet but remain almost entirely disconnected. Subnero’s mission is to change that by building the Internet of the Oceans. The deployed network delivered seamless mobility and multi asset connectivity through this environment, giving us greater conviction that we are ready to transform how subsea missions will be conducted going forward.”

— Manu Ignatius
CEO, Subnero

“This collaboration shows that cellular style networks bring real operational value to subsea missions. Validating this architecture in Singapore opens the door for scalable solutions across defence, commercial maritime, offshore energy and research sectors.”

— Jin Jie Jay Poh
Vice President and Head of Unmanned Systems Business Unit, ST Engineering

Potential applications include:

Autonomous subsea fleets
Persistent subsea IoT systems
Diver tracking and safety
Offshore inspection and maintenance
Connected maritime defence networks
Scalable research and monitoring systems

Download PDF

Improving Underwater Communication with Subnero Multi-Receiver Modems

Thu, 13 Nov 2025 00:00:00 +0000

Underwater acoustic communication faces several physical limitations: restricted bandwidth, long propagation delays, severe multipath—especially in shallow waters—Doppler effects, and high ambient noise. Traditional modems with a single receiver rely heavily on sophisticated signal processing, but performance is ultimately constrained by the quality of the signal captured at that one location. If the receiving element happens to sit in a deep null or a locally noisy patch, recovery becomes difficult. Many underwater systems also require localization and tracking, which often rely on separate hardware such as USBL arrays or dedicated receivers, adding to overall operational complexity.

Subnero’s multi-receiver modems address both needs at once—capturing multiple spatially separated signals for improved communication robustness while also enabling bearing estimation and positioning capabilities within the same platform. This enhances communication performance, reduces hardware requirements, simplifies integration, and streamlines operations in the field.

Why Multiple Receiving Channels Matter?

Adding multiple receivers introduces receive diversity. Each hydrophone receives a slightly different version of the signal, giving the modem more information to work with. Even in degraded conditions, combining information from all hydrophones increases the likelihood of successful decoding. This forms the basis of Single-Input–Multiple-Output (SIMO) systems, which provide higher receive gain, improved signal-to-noise ratio, and more resilient communication performance.

Practical Impact on Throughput and Range

The benefits are often substantial.

A user experiencing 30–40% packet loss with a single-receiver modem may see losses drop to under 5% with just one additional receiver, depending on spatial placement.
With three or four receivers, overall loss can approach near-zero, resulting in a highly stable link even in difficult environments.

These gains translate directly into higher effective throughput, longer communication ranges, and far more consistent performance in dynamic or shallow-water deployments.

Multiple receivers unlock capabilities that are particularly valuable for research users:

Acoustic communications research Users can test SIMO-based techniques, spatial combining, direction-of-arrival estimation, multipath mitigation strategies, or advanced PHY/MAC concepts. Subnero modems provide access to raw data streams from all receivers, making them flexible testbeds for developing and validating new communication algorithms.
Navigation and tracking research With hydrophones placed at different spatial locations, researchers can implement Time Difference of Arrival (TDOA), Phase Difference of Arrival (PDOA), or hybrid methods to estimate range, bearing, or full 3D position. This enables experiments in underwater localization using the same hardware platform.

These features allow teams to use Subnero’s multi-receiver modems not only as communication devices but also as versatile platforms for scientific experimentation and algorithm development.

Operational Applications Enabled by Multiple Receiving Channels

Beyond research, multiple receiving hydrophones support a wide range of real-world applications:

Bearing estimation of underwater sources
Target tracking, depending on array geometry
Array-based sensing and environmental characterization
Custom USBL-style processing using user-developed algorithms

Subnero modems additionally support external GPS PPS (Pulse-Per-Second) input for absolute timing and optional AHRS sensors (Attitude and Heading Reference System) to provide orientation information when required.

Beyond Communications: Passive Acoustic Sensing

Multi-receiver modems can also act as capable passive acoustic monitoring systems. By fusing information from multiple receivers, users can estimate the range and bearing of acoustic sources—useful for rapid environmental assessment, situational awareness, or wildlife monitoring. Subnero’s multi-receiver modem has already been used by research groups for tracking marine mammals and other field studies.

Learn More About Subnero’s Multi-Receiver Modems

By adding the optional additional hydrophones, users can upgrade Subnero’s smart modems into multi-receiver modems. This provides all the capabilities described above within a robust, configurable platform suitable for both operational deployments and research-focused experimentation. Learn more about how to enable multi-receiver capability on your modems here.

Deep-Water Testing of Modems with Nauticus Robotics in the Gulf of Mexico

Tue, 30 Sep 2025 00:00:00 +0000

Singapore, September 30, 2025. Subnero Pte Ltd., a leader in underwater wireless communication solutions, today announced the release of a deployment spotlight showcasing the successful deep-water testing of its acoustic smart modems in collaboration with Nauticus Robotics, Inc. (NASDAQ: KITT).

The tests, conducted in the Gulf of Mexico, benchmarked Subnero’s deep-rated modem performance during vertical communication trials down to 2300 meters. Mounted on Nauticus’ flagship subsea robot Aquanaut, the modems maintained continuous communication with a topside unit deployed from a mothership. Results demonstrated robust performance across the full depth range, and the benefits of advanced Subnero software features.

“These results reaffirm our mission to deliver underwater communication solutions that work everywhere — from challenging tropical shallows to the deepest offshore fields,” said Manu Ignatius, CEO of Subnero. “Collaborations like this with Nauticus Robotics are critical in proving real-world performance and enabling the future of autonomous subsea operations.”

John Gibson, President and CEO of Nauticus Robotics, stated, “Aquanaut represents the future of subsea robotics, and Subnero’s modems are a critical enabler of our vision. These tests proved that reliable underwater communication can be achieved at ultra deep-water operational depths, giving us the confidence to expand autonomous operations globally.”

The deployment spotlight underlines how Subnero’s technology supports a new class of subsea operations, unlocking greater efficiency and safety through autonomous systems.

The full text, “Deep-Water Testing of Subnero Modems in the Gulf of Mexico,” is available here.

Nauticus has also issued its own press release, available here.

Hardware-in-the-Loop Simulation Support for Subnero Modems

Thu, 12 Jun 2025 00:00:00 +0000

We’re excited to announce hardware-in-the-loop (HIL) simulation support across our entire range of acoustic smart modems powered by UnetStack. This new capability is being launched at the OCEANS 2025 Conference in Brest, where we’ll also host live demonstrations at our booth.

This capability allows any Subnero modem running UnetStack v5 to be configured to interface with a local simulation environment—enabling early-stage testing and iteration before investing in costly and time-consuming at-sea deployments.

At the core of this simulation framework is the open-source Virtual Acoustic Ocean (VAO)., which acts as the acoustic channel simulator, along with the UASPv2 protocol. for seamless communication integration. The platform supports industry-standard channel models and allows users to integrate their own channel models for even greater fidelity and customization.

Highlights of the new simulation support include:

Supports all Subnero modems running UnetStack v5
Connect multiple modems to a single VAO instance
Customize propagation models for different environments
Also compatible with UnetStack OEM Edition on SBCs

This high-fidelity simulation framework provides a cost-effective and scalable way to test underwater network performance, mission planning, and protocol design. Since Subnero’s modems are software-defined and run the exact same UnetStack software in and out of the water, the system behavior in simulation mirrors real-world deployments — contingent only on the accuracy of the chosen channel model.

Visit us at the OCEANS 2025 booth for a live demo featuring Subnero modems and OEM boards operating over simulated underwater channels. For a personalized demonstration or to learn more, contact us at sales@subnero.com or visit www.subnero.com.

New Product Launch - Gen4X Underwater Acoustic Smart Modems

Mon, 07 Apr 2025 00:00:00 +0000

FOR IMMEDIATE RELEASE

Subnero Launches Gen4X Series: Next-Generation Underwater Acoustic Smart Modems

Singapore, 7 April 2025 – Subnero, a leader in underwater wireless communication technologies, is proud to announce the launch of its Gen4X series acoustic smart modems. Designed to push the boundaries of underwater connectivity, the Gen4X modems bring enhanced performance, flexibility, and integration capabilities to a wide range of subsea applications.

Building on Subnero’s legacy of innovation, the Gen4X series features a compact form factor and is engineered for ease of integration into diverse platforms—from subsea IoT systems and marine robots to diver communication networks. With exciting capabilities like acoustic wakeup, hardware-in-the-loop simulation support, Gen4X is built to meet the demands of modern underwater missions.

At the core of the Gen4X series is UnetStack, the latest version of the powerful underwater networking software stack. This enables robust and programmable networking, greater protocol flexibility, and improved support for distributed autonomous operations.

The Gen4X series is available in various open configurations to support custom integration needs. The Gen4X series is expected to begin shipping by summer 2025, with pre-orders and early access programs now available for select partners.

For more information, or to request a demo or quotation, please contact sales@subnero.com or visit www.subnero.com.

Subnero unveils new generation of underwater acoustic smart modems

About Subnero

Subnero is a Singapore-based company specializing in underwater wireless communication and networking solutions. Through its line of advanced acoustic modems and software-defined networking technologies, Subnero helps customers around the world build intelligent, scalable, and reliable subsea systems.

“With Gen4X, we’re not just offering a hardware upgrade—we’re delivering a platform designed for the future of underwater systems. Whether you’re deploying an AUV swarm, building subsea sensor networks, or supporting tactical operations, Gen4X is engineered to adapt and perform.”

— Manu Ignatius
CEO, Subnero

Shaping the Future of Subsea Connectivity with Cellular Networks

Sat, 30 Nov 2024 00:00:00 +0000

Subnero (along with our collaborators ST UIS) recently published a paper titled Design, Development, and Deployment of an Underwater Cellular Network, presented at the OCEANS Halifax conference. This work represents a significant leap toward realizing Subnero’s vision of establishing underwater connectivity akin to terrestrial wireless networks. The paper details the development of a subsea cellular network enabling seamless communication and localization for underwater assets such as autonomous vehicles and sensors. The network was tested near Singapore, leveraging Subnero’s acoustic smart modems for robust communication and localization. The deployment demonstrated capabilities for real-time data exchange and continuous asset tracking, marking a major milestone in subsea networking innovation. We are actively working to improve and expand this network, integrating new capabilities to drive further innovation and application readiness.

Subnero Underwater Network

This publication also underscores Subnero’s evolution from a National University of Singapore spin-off to a global leader in underwater wireless technology. It highlights our commitment to extending the internet into the subsea realm by creating scalable, cost-effective, and safe heterogeneous networks. The Singapore testbed is a tangible step toward transforming our decade-old dream into reality, supporting applications in research, energy, marine industries, and defense. By achieving this milestone, Subnero is cementing its position as the de-facto standard for underwater communication and sensing networks, pushing the boundaries of subsea innovation.

Subnero Successfully Demonstrates Interoperability using SWiG Standard at WUWNET 2024

Fri, 15 Nov 2024 00:00:00 +0000

Subnero recently participated in an interoperability test at the WUWNET 2024 conference in Šibenik, Croatia. The goal of the event was to demonstrate seamless communication between acoustic modems from various vendors using the Subsea Wireless Group’s (SWiG) acoustic Level 1 standard specification. We were thrilled to successfully showcase interoperability alongside EvoLogics GmbH, WSENSE and NORCE (research modem) during an in-water demonstration in the Adriatic Sea.

SWiG interoperability demonstration setup at WUWNET 2024, Croatia

The test setup consisted of one transmitter and four receivers from various participating companies. The transmitting modem broadcasted positioning messages using the SWiG Level 1 standard, while the receivers from various vendors decoded and displayed the information. The shallow water depth and rocky bottom provided a challenging acoustic propagation environment, but it effectively demonstrated the functionality of the SWiG standard in real-world conditions.

The test day unfolded as follows. The transmitter modem on a moving boat transmitted SL1 messages containing its location every few seconds. The receivers on the pier successfully decoded these messages and displayed the results in real-time on a map. A research modem from NORCE also served as a hydrophone, providing real-time spectrograms of the underwater transmissions.

At the same time, another research modem transmitted High Data Rate Channel (HDC) packets based on the Dual Channel Acoustic Protocol (DCAP), while the transmitter modem on the boat continued to send positioning messages. The receiving modems attempted to simultaneously decode both waveforms. If the HDC packets could not be decoded, the receivers would switch to decoding Simultaneous Multiple Access Channel (SMAC) packets from DCAP. The test successfully demonstrated the flexibility of DCAP for handling different data transmission needs.

We at Subnero are excited by the outcome of this successful interoperability test. This collaboration between multiple vendors paves the way for more standardized and interoperable subsea acoustic communication solutions in the future. We look forward to continued innovation and partnerships within the SWiG community.

Social media highlights:

Subnero: “We were thrilled to successfully demonstrate interoperability with other vendors such as EvoLogics GmbH and WSENSE using the hashtag#SWiG standard during an in-water demonstration in the Adriatic Sea.” Link
EvoLogics GmbH: “Our team has just returned from beautiful Šibenik, Croatia, where EvoLogics, Subnero, and WSENSE collaborated to successfully showcase interoperability among our underwater modems at the SWiG event during the #WUWNet conference.” Link
WSENSE: “Our recent participation in the #SWiG (Subsea Wireless Group) demonstration in Šibenik, Croatia, marked a significant step forward in underwater interoperability!” Link

New Explainer Series - Unlocking the Potential of SWIS - ADCP Edition

Wed, 30 Oct 2024 00:00:00 +0000

We are excited to announce the release of a new video series on Subnero’s YouTube channel, focusing on the Subnero Wireless Integrated Suite (SWIS) - ADCP Edition. This series offers a deep dive into five key areas that highlight the importance of acoustic smart modems, their integration with ADCPs, and how the SWIS - ADCP Edition addresses challenges traditionally associated with underwater communication. The videos are designed to provide both an introduction to acoustic modems and a practical guide to utilizing SWIS with Nortek ADCPs, making this series ideal for oceanographic professionals and anyone interested in underwater wireless communication.

Through these videos, viewers will gain a clear understanding of what makes acoustic smart modems critical for marine data collection, the challenges of underwater communication, and how SWIS - ADCP Edition provides a smarter, more efficient solution for long-term deployments. Whether you’re looking to improve your understanding of underwater wireless communication or need practical insights into using SWIS with Nortek ADCPs, this explainer series will equip you with the knowledge to optimize your underwater monitoring efforts.

Subnero and HydroSurv Collaborate on Autonomous Subsea Data Operations for Persistent Ocean Monitoring

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One Modem, Two Jobs - Communication and Tracking from the Same Hardware

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RTS Enhances Subsea Connectivity for Cube Systems with Subnero Smart Modems

Key Advantages:

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Bridging the Subsea Data Gap - Field Results from the SWIS ADCP Edition Deployment

Why SWIS - ADCP Edition?

Join us at OI 2026

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Transforming Underwater Research – New Case Study with the Underwater Acoustic & Navigation Lab (ANL)

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About Underwater Acoustic & Navigation Lab (ANL)

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Building Connectivity with Confidence for Subsea Robotics

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Internet of the Oceans – A Connected Ocean Begins in Singapore with Underwater Cellular Network Launch

Bringing Terrestrial Cellular Network Principles to the Depths

Key Technical Outcomes

Unlocking New Possibilities for the Subsea Economy

A First Look at the Internet of the Oceans: Why It Matters

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About ST Engineering Unmanned and Integrated Systems

Potential applications include:

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Improving Underwater Communication with Subnero Multi-Receiver Modems

Why Multiple Receiving Channels Matter?

Practical Impact on Throughput and Range

A Platform for Research: Acoustic Communications, Navigation and Tracking

Operational Applications Enabled by Multiple Receiving Channels

Beyond Communications: Passive Acoustic Sensing

Learn More About Subnero’s Multi-Receiver Modems

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Deep-Water Testing of Modems with Nauticus Robotics in the Gulf of Mexico

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Hardware-in-the-Loop Simulation Support for Subnero Modems

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New Product Launch - Gen4X Underwater Acoustic Smart Modems

FOR IMMEDIATE RELEASE

Subnero Launches Gen4X Series: Next-Generation Underwater Acoustic Smart Modems

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Shaping the Future of Subsea Connectivity with Cellular Networks

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Subnero Successfully Demonstrates Interoperability using SWiG Standard at WUWNET 2024

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New Explainer Series - Unlocking the Potential of SWIS - ADCP Edition