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
Blueprint Subsea’s Artemis HHS Takes the Spotlight on 7 News!
Innovation and execution! Improving Search and Recovery for QLD Police Divers Revolutionising the future for police diver operations, we are thrilled to share Blueprint Subsea’s Artemis HHS has been...
Read MoreAHA 2025 Event – Launceston On our mission to stay ahead of the tide, this month the BlueZone team had the pleasure of attending ‘The Australian Hydrographers Association (AHA)’...
Read MoreBlueZone Group Proudly Represents Xeos by Satlink in Australia
Supporting Innovation and Sustainability in Ocean Technology The commitment to innovation driven sustainability is at the forefront of BlueZone’s values. As the proud, exclusive agent of Xeos by Satlink...
Read More