Sonardyne
Support Centre

Which RT 6 is correct for my operations?

We offer four different releases designed for different operational scenarios. From shallow to deep and light to heavy, this article highlights some of the deciding factors between the variants.

Working in coastal regions or with simple seabed frames?

The RT 6-1000 is the workhorse of shallow water releases. It has class leading depth, working load limit and battery life. If using HF, our LRT is an alternative option.

For 90% of shallow water use cases the RT 6-1000 is perfect because of it’s reliability, endurance and lifting capacity.

Did you know you can also release the RT 6-1000 with our medium frequency Ranger 2 USBL systems?  If you don’t have Ranger 2, it can be released via an app or via our iWand.

What if I don’t want to leave any seabed infrastructure in place?

A key feature of the RT 6-1000 is its optional rope canister. Instead of the traditional method of weighing seabed infrastructure down and releasing a buoyant frame to the surface, the rope canister means you can release a buoy and pull line to the surface for retrieval. This enables you to haul up to 250kg of equipment back to the surface without needing to suspend a large load on the release nut.

The RT 6-1000 covers the majority of use cases for the coastal zone. The full RT6 range can also be used in shallow water for different working loads.

Working off the continental shelf or nearer to shore with heavier infrastructure?

Firstly, don’t forget the 1000m depth rating of the RT 6-1000 will allow you to work well off the continental shelf.

However, most users of the RT 6 range in deep water will be looking at our RT 6-3000 and RT 6-6000. Form factor wise, these are identical which means that your frames can support both of these releases. The only functional difference here being the fact that they come in medium and low-medium frequency versions. But what does this mean practically?

Due to spreading and absorption, acoustic communications propagate more and are more reliable at lower frequencies, so we have tuned our RT 6-6000 and RT 6-HD in the 14-19 kHz range to ensure you will always be able to talk to these devices at depth. As reliability and working load are key, RT 6-3000 works down to 3000 m reliably and at slant ranges of up to 4,500m.

Working at full ocean depth or with large seabed infrastructure?

Check out our RT 6-HD, with its super duplex stainless steel housing, WLL of 2.5 tons and a 3 year battery it’s a workhorse for deepsea moorings.

Any questions? See our YouTube videos or contact support. Also, have a look at our other knowledge base articles which describe the working load limits of our RT 6 range.

As mentioned above, you can release an LMF release with an MF Ranger 2 system, read the article about this here.

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