[Thommas]

How did this guy and his team pull off this stunt? Hundreds of feet under near freezing water is no small obstacle.

[packrat35]

He didn’t, the US did it.

[adorno]

How did this guy and his team pull off this stunt? Hundreds of feet under near freezing water is no small obstacle.

How was the pipeline built in the first place? After all, the construction was done hundreds of feet under water, in near freezing conditions. ;)

[ScaniaBoy]

The actual dive was probably not the most difficult problem to overcome. There are lots of so-called technical divers in the Baltic who dive much deeper than the 260 ft needed to reach the pipe-line. They use electronically controlled rebreathers, and there are quite a few different marks available for the private/civilian diver.

The main difference between a professional dive operation and what the Ukrainians are supposed to have done is the safety measures. Good tech-divers usually make sure they either carry emergency gas bottles with them or hang them at various depths. However, the professional diver is usually connected to the surface or to a diving bell close to his working site. That would not have been possible for the divers in this operation.

I think the most difficult part of the operation would have been to find the pipe-line, and to find a good site to place the explosives. Also, of course to build and to handle the explosive device.