Really good report, well worth a read. A lot of very relevant HF stuff in there as well.
An interesting detail is that they were cleared and flew the approach in vis well below minima but were unaware of that because they weren’t told by ATC. They also went visual before they could see the airport or runway (allowable), then misidentified another feature as the runway. Lowest point 39’AGL 0.3NM from the threshold.
Lots of things all lining up and nearly putting them in the water, classic “holes in the cheese” stuff. Plenty of learning points here...