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?