They have demonstrated capabilities like blowing up the Kerch Strait bridge or several Russian oil refineries without US help, what makes you think Nord Stream is too difficult for them?

According to the New York Times, Ukraine receives major help from the US on all fronts:

https://www.nytimes.com/2024/02/25/world/europe/cia-ukraine-...

The first Kerch Bridge attempt was only a partial success. Traffic continued almost the next day. The second attempt was a complete failure. For the refineries, Ukraine uses at least GPS.

The sail boat theory is plausible from diving standpoint, but they allegedly installed explosives on NS-1 and NS-2 sites that were at least 100km apart, within 10 hours, with no decompression equipment. If they can do that, why do they repeatedly fail at Kerch Bridge?

> If they can do that, why do they repeatedly fail at Kerch Bridge?

The bridge is approximately 3km long or so, which makes it relatively easy to maintain a continuous 24/7 armed presence to prevent sabotage. An underwater pipeline is a 1200km stretch mostly in other international territory that is hard to protect. Definitely much easier to blow up a pipeline than it is to blow up a bridge.

Why bring up "decompression equipment"? Have you ever even done any tech diving? We just deco in the water. No special equipment is needed beyond a rebreather or some stage tanks.

They sent their A team for the pipeline and B team for the bridge?