Kite wrote:That's good stuff Mariner!
Check out
http://www.uboat.net for great cross references between U-Boats, their Commanders, the ships they sank, attacks made on them (by Allied aircraft and surface vessels) and the technology, shipyards etc.

There are some good web sites. But what I now post has never been posted before this (afaik)
first read the story I posted on the musuem site:
http://www.mariner.ie/history/remember/wwii-losses/irish-oakThe Irish Oak was following a corridor specified by the allies for neutrals. They saw snoke on the horizon. They assumed correctly that it was from an allied convoy. they did not want to join the convoy, so they slowed down, waiting for the convoy to move out of the way. Then the u=boats appeared
It was alledged that the Irish Oak warned the convoy of the u-boats. this was denied in the strongest terms by deV, by Irish Shipping, the Brits, everyone (other than the Labour party). But let us consider the facts:
The convoy was SC-129. There was another convoy HX-237 which had an aircraft carrier HMS Biter to protect it. U-boats were scared of aircraft, u-boats couldn't see them while the planes could drop depth charges. Biter left HX-237 and joined SC-129 on 14 May. U-642 spotted Biter and radioed the others, the wolf pack scattered. on May 15 the Irish Oak was sunk. Om May 24 the u-boats were recalled.
So why did Biter leave HX-237? Perhaps British intelligence knew of the wolf pack?
John Clarke told me that they were sworn to secrecy.
The Irish Oak (going to Ireland) exchanged a greeting with the Irish Plane (going from Ireland) as they passed. Perfectly normal. But there was a message in the message "Frank is aboard for this voyage". The radio operators on the ships in the convoy would hear the exchange and understand its meaning.
John further stated that Captain Jones later asked the r/o if he was certain that the message had been sent (the convoy was still on the same course)
John said that they were all sworn to secrecy
There is one difficulty which I should mention: Archives in Kew say that Biter was ordered to move on May 13. That greeting was transmitted on May 14. This little niggle causes me to hesitate, which is why I didn't post before