The Release Transponder 6 (RT 6-1000) is a rugged and reliable coastal release transponder which uses our field-proven 6G Wideband®2 acoustic ranging and telemetry protocol. RT 6-1000 can be used in both Transponder Mode (subsea) and Topside Control Mode (to release another subsea RT 6-1000) using the Sonardyne RT6 App on an NFC enabled Android™ device or tracked and released using a Ranger 2 6G USBL system. 

The Sonardyne RT6 App has been specially developed to configure, load the release nut prior to deployment and release the RT 6-1000. It can also run self-test functions, read battery status, add a GPS marker of your deployment position and locate a deployed RT 6-1000. The NFC link also provides the ability to enter RT 6-1000 into a storage mode when not in use, thereby significantly increasing the overall battery endurance.

RT 6-1000 is depth rated to 1,000 metres making it the ideal choice for use in continental shelf waters. Field replaceable alkaline battery packs give a listening life of >15 months. A ‘screw-off’ release mechanism ensures a positive release action that overcomes any biological growth and all external parts are made of high strength plastics that provide excellent environmental corrosion resistance.

An optional attachment for the RT 6–1000 is a rope canister that allows items left on the seabed, for example, tools, cables and salvage, to be quickly and easily hauled up. This works by mooring one end of the rope to the item on the seabed and the other end to the RT 6–1000 via the attached canister of rope. As the transponder ascends to the surface, high strength rope is deployed from the canister. This line can then be used to pull up the item directly or retrieve heavier tag lines.


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