Transponder and Interrogator compatible with Sonardyne systems
Commercial diving companies operating in an area that requires their diving bell to meet offshore standard DNV-OS-E402, must have an emergency locating system that meets section 305 of that standard.
RJE International provides the ATT-400/AODC transponder – a small battery operated underwater acoustic device, which is used to mark commercial diving bells for emergency relocation to depths of 1000 meters. The interrogation frequency is factory set to 38.5kHz (Ch-A) or 39.5kHz (Ch-B) and, when interrogated, replies to the pre-set emergency frequency of 37.5kHz and meets the DVN-OS-E402 standard.
A diver held interrogator for the transponder, the DTI-300/AODC interrogator is also available. To ensure a smooth transition, the ATT-400/AODC transponder is compatible with the older Sonardyne systems and can be located with the Ranger2 USLB system and Homer-pro receivers presently in use and fielded.
![]() |
AODC Transponder and Interrogator for Diving Bells. |
Up to 25-hour mission duration
Speeds up to 4.2 knots
Increased module payload capacity
Search and recovery
Hydrography
Deep sea mineral exploration
Marine & Fisheries research
BlueZone Group is pleased to distribute products supplied by Sonotronics. Sonotronics is a leader in the manufacturing of ultrasonic tracking equipment related to the underwater tracking of marine animals, equipment...
Read moreBlueZone supplies RJE International acoustic receivers and interrogators.
Read moreDiver/Asset Recovery System (DARS)
The Diver/Asset Recovery System (DARS) allows Public Safety Divers (PSD) to easily relocate subsea assets and other divers during search and recovery missions in the poorest conditions. The DARS system...
Read moreCelebrating 25-Years of BlueZone Group
A Quarter Century of Maritime Excellence Founded in 2000 by Darren Burrowes and Neil Hodges, BlueZone Group began with a shared vision: advancing Australia’s Mine Counter Measures capability. With...
Read MoreHigh Speed Innovation: Exploring MARTAC’s Unmanned Surface Vehicles
Offering Speed, Flexibility, and Advanced Autonomy, MARTAC USVs are Built to Perform in the Most Challenging Environments Engineered to deliver high-speed, autonomous performance across a wide range of maritime...
Read MoreWaves of Insight: Monitoring Marine Dynamics with the OBS-Buoy 7-Watt
Delivering Smart, Solar-Powered Wave Monitoring for Real-Time Ocean Insights Ocean Wave Monitoring is the process of measuring and analysing the movement and behaviour of waves across the ocean surface....
Read More