Safeguarding Critical Subsea Assets with RJE Beacons

Ensuring Recoverability in High-Value Underwater Missions.

The Importance of Subsea Asset Tracking

Modern subsea operations rely on increasingly sophisticated autonomous and remotely operated technologies. From mine countermeasure missions and offshore energy inspections to hydrographic surveys and scientific research, Autonomous Underwater Vehicles (AUVs) and Remotely Operated Vehicles (ROVs) are expanding what is possible beneath the surface. Yet as these systems operate further offshore, deeper underwater, and with greater autonomy, one challenge remains constant: ensuring valuable subsea assets can always be located, tracked, and recovered when required.

Unlike surface vessels or aircraft, underwater platforms cannot rely on GPS once submerged. Instead, acoustic technologies provide the critical link between operators and assets operating deep beneath the waves. Acoustic pingers, underwater locator beacons, and transponders have become an essential layer of operational assurance, enabling teams to track equipment, relocate assets, and rapidly respond to unexpected events. Reliable tracking is no longer simply a recovery tool. It has become a vital component of asset security, risk mitigation, and mission success.

RJE Acoustic Pingers: Reliable Location and Recovery Solutions

Among the most trusted solutions in this field are the acoustic pingers developed by RJE International. Designed specifically for subsea tracking and recovery applications, RJE’s Underwater Locator Beacons (ULBs) provide a robust acoustic signature that can be detected by dedicated receiver systems, allowing operators to accurately locate submerged equipment even when visual contact has been lost.

For AUV and ROV operators, pingers provide a critical safeguard against equipment loss. Whether attached to a vehicle, sensor package, towfish, mooring, or subsea tool, the beacon continuously transmits an acoustic signal that can be detected over considerable distances. In the event of a vehicle malfunction, communication failure, or unexpected mission interruption, operators can rapidly relocate and recover assets, reducing vessel time, operational delays, and replacement costs.

Autonomous Capability with Integrated Tracking

One such solution is the RJE ULB-350/37 Underwater Acoustic Beacon, a compact and highly reliable pinger operating at 37 kHz. Designed to mark underwater assets and equipment, the beacon offers a simple but highly effective method of maintaining awareness of critical subsea systems throughout a mission. Its lightweight design and proven performance make it well suited for integration with a wide range of autonomous and remotely operated platforms.

The evolution of underwater autonomy is also driving closer integration between tracking systems and next-generation vehicles. A notable example is the HII REMUS 300, an advanced medium-class AUV developed for defence, mine countermeasure, hydrographic, and security missions. Within Australian programs, the REMUS 300 has been integrated with the RJE ULB-350/37 acoustic beacon and associated PRS-275 Pinger Receiver System, providing operators with an additional layer of certainty and recoverability during autonomous operations. This integration combines advanced autonomous sensing and navigation with proven acoustic location technology, ensuring operators maintain confidence in mission execution while reducing the risks associated with operating high-value autonomous systems.

As underwater robotics become increasingly capable, the concept of subsea asset security is evolving. Operators today are not simply deploying vehicles; they are managing interconnected fleets of intelligent systems carrying advanced payloads and collecting mission-critical data. Acoustic location technologies are therefore becoming an integral part of a broader digital ecosystem focused on situational awareness, operational resilience, and mission assurance.

A Holistic Solution for Australian Operators

This is where BlueZone Group’s partnerships deliver significant value to Australian operators. As the Australian sales and service partner for both HII Unmanned Systems and RJE International, BlueZone Group offers a comprehensive capability that extends well beyond equipment supply. Customers can access advanced autonomous underwater platforms alongside integrated acoustic tracking and recovery solutions, supported through local engineering, training, sustainment, and technical service.

The combination of HII’s world-leading REMUS AUVs and RJE’s proven underwater location technology provides operators with a holistic solution for conducting safe, effective, and secure subsea operations. Whether supporting defence missions, offshore energy projects, critical infrastructure inspections, or scientific exploration campaigns, organisations benefit from the confidence that valuable subsea assets remain locatable and recoverable throughout the mission lifecycle.

Enabling the Future of Underwater Operations

As maritime operations continue to embrace autonomy, subsea tracking technologies will play an increasingly important role in enabling trusted, persistent, and resilient underwater operations. The future of subsea capability is not just about collecting better data or operating longer missions. It is about ensuring every asset can be found, recovered, and returned safely when it matters most.

Through its partnerships with HII Unmanned Systems and RJE International, BlueZone Group is helping bring that future to Australia today, delivering a complete ecosystem that enables operators to work with confidence beneath the surface while protecting both mission success and valuable subsea assets.

For more information on RJE International’s ULB350/ 37 beacon, please Contact the BlueZone Group sales team.

Two technicians in blue shirts position a gray REMUS underwater drone with an orange top docking sensor in a workshop. Two people in a workshop exchange a white bottle; one wears a blue polo with 'Blue Zone Group' logo and visible tattoos on the forearm.