I watched the latest videos posted by @rjehangir of their dives to 1050 feet in the Santa Barbara channel. How did this BlueROV2 configuration differ from the standard kit? What lessons were learned from such a deep dive? [Blue Robotics "BlueROV2": Part 3 - 1050 feet]

Hi Paul, This BlueROV2 was the standard configuration except with the upgraded aluminum tubes for the 4" and 3" Series enclosure. I do have to note that we had a very minor leak during the deepest test at 340m. Over the span of 15-20 minutes, about 10-15 drops of water got into the main electronic…

That’s amazing performance from a low cost ROV!!! [image] rjehangir: Another lesson - the tow sled that the ROV was tethered to made this dive easy. Without that, it would have been very difficult. Dragging around 300m of tether behind the ROV just wouldn’t be possible. Was the ROV powered b…

Thanks, Paul! It was powered by the internal batteries. -Rusty

Using the stock battery? How long was the ROV underwater all together? It usually takes a while to dive to that depth…

Paul, Yes, the stock battery. We actually just got pulled down and up by the tow sled, which is on a winch, so we had tons of battery life. The first dive was around 1.5-2 hrs and we had plenty left when we came back up. -Rusty

Right, that’s one of the advantages of using a TMS, or in this case, a towed camera. This is truly impressive and clearly shows the huge advantage that an “open frame” thruster has over conventional fluid filled thrusters. I’m equally impressed that the housings, and in particular the epoxy filled…

I concur, excellent work guys! It was fun watching the videos. This is pretty much how the E/V Nautilus does their ROV operations as well. @paul-unterweiser We’ve been out and tried just free tether dives out to 100m before and they just don’t work well. The boat gets dragged by current and wind mu…

The machinery may not need to be that heavy depending how heavy the TMS cage and wire is. FYI using a separate towed unit with an ROV is nothing new. I’m not sure who was first but my first experience with a system like that was while working with WHOI and Jason / Medea in 2002. [image]

The camera dome took 1000 feet? Impressive! Maybe my treasure wreck target is reachable then!

@Tim - yes, the dome is pretty awesome. You should be pretty safe going to 1000 ft. We’re still trying to figure out the actual maximum depth but so far we’ve seen slight damage at 500m and failure at 700-900m. -Rusty

Configuration / lessons learned from deep dives?

General Discussion

rjehangir (Rusty) July 5, 2017, 7:48pm 15

@nmau - You can find out a lot more about the sled here: Towed Camera Sled

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Configuration / lessons learned from deep dives?

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Configuration / lessons learned from deep dives?

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