Search found 3055 matches

by Dave Saxton
Mon Aug 05, 2019 3:40 pm
Forum: Bismarck General Discussion
Topic: Early RDF Type 284 Radar Performance
Replies: 15
Views: 428

Re: Early RDF Type 284 Radar Performance

Tovey's report is valuable because rather than based on tests of small sample size, it is compiled from a larger sample size of empirical observations during operations of the fleet. It therefore represents a real world average. Included in that average would be sets mounted on both cruisers (a larg...
by Dave Saxton
Mon Aug 05, 2019 1:15 am
Forum: Bismarck General Discussion
Topic: Early RDF Type 284 Radar Performance
Replies: 15
Views: 428

Re: Early RDF Type 284 Radar Performance

Ellis reported that the 284 on Suffolk could hold the Bismarck out to an absolute maximum of 13 miles on occasion. Examination of the records of the shadowing, indicate that contact was regained in most cases after resting the set, or if contact had been lost, at about 18,000 yards.
by Dave Saxton
Mon Jul 01, 2019 3:57 pm
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

Hi Dave, I repeat that possibly the message (sent at 20:00 on March 27) was intercepted and decrypted. However it did never reach Cunningham, who was already at sea. Assuming that specific message, and that it is time documented correctly, was the only source of that particular Intel available to t...
by Dave Saxton
Sat Jun 29, 2019 3:10 pm
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

Hello everybody, "OK so Mr Virtuani, do you believe Mavis Lever and Hugh Lee misremembered the long message being sent to Cunningham before he sailed? " Yes I do. I repeat that I don't know whether the message was intercepted and decrypted (it possibly was, at was time I don't know), but for sure i...
by Dave Saxton
Sun Jun 23, 2019 5:24 am
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

We may not be too sure of Hinsley's "specifics" here. This is a return to the Luftwaffe Enigma was the leak theory disproved by Divita. The short X-3 message with the Luftwaffe message (assumed) details is way too vague and lacking in information to explain Cunningham's moves. The fatal message is d...
by Dave Saxton
Mon Jun 17, 2019 3:42 am
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

Yes, the chronology given by me above does need some correction. It was on the 27th, or X-1, that the second message, a long message, and the fatal, message was received. The source for this is Mavis Batey herself, as she wrote in her book: https://books.google.com/books/about/Dilly.html?id=V7utQAAA...
by Dave Saxton
Thu Jun 13, 2019 2:36 pm
Forum: World War II
Topic: Britain Sues for Peace 1940.
Replies: 11
Views: 1523

Re: Britain Sues for Peace 1940.

Hitler was always looking east. Now with his hubris unchecked he strikes east. Perhaps he prevails. A new Dark Ages commences.
by Dave Saxton
Wed Jun 12, 2019 9:55 pm
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

The information was quickly transferred to Cunningham at Alexandria. Cunningham sent the flying boat and planned to sail just after dark. He went ashore for a round of golf, knowing the Japanese consul would be at the golf course. He also knew that the Japanese consul would inform the Italians that ...
by Dave Saxton
Wed Jun 12, 2019 9:50 pm
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

The British cryptanalysts began to try and construct cribs under the assumption that the addressee of the message would be given with the phrase: “ per (the name of the addressee)”. A 19 years old linguist by the name of Mavis Lever discovered that the Italians were no longer using that phrase in th...
by Dave Saxton
Wed Jun 12, 2019 9:42 pm
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

Winterbotham got some details wrong in his description of how Ultra set up Matapan. Winterbotham implied that it was the German Luftwaffe Enigma that revealed the plans to the British. Iachino did not send any naval messages prior to Matapan but had arranged the operation by giving all orders via la...
by Dave Saxton
Wed Jun 12, 2019 9:38 pm
Forum: Naval History (1922-1945)
Topic: Matapan
Replies: 73
Views: 3970

Re: Matapan

Matapan was a decisive battle. It determined the fate of the RM in the Med. This battle was brought about almost entirely through Ultra Intel. Following the rules of using Ultra, they had to set up a plausible explanation to enemy analysis as to how they obtained the necessary Intel beforehand. Ther...
by Dave Saxton
Tue May 21, 2019 2:07 pm
Forum: Bismarck General Discussion
Topic: Message Traffic heard by RODNEY 24 May 1941
Replies: 251
Views: 9311

Re: Message Traffic heard by RODNEY 24 May 1941

FWIW, I have records, from USN target practices, of quite a few first salvo straddles on targets at ranges well over 20,000 yards, even before WWII. So such an occurrence, while unusual, was by no means unknown, especially if the first salvo pattern was fairly large. Bill Jurens I don't discount th...
by Dave Saxton
Mon May 13, 2019 12:05 am
Forum: Naval Technology
Topic: Deep load
Replies: 3
Views: 348

Re: Deep load

Treaty limits are standard displacement not deep load or full load displacement. Standard Displacement as defined by the Washington Treaty was the ship fully stored and ammunitioned, but excluding fuels, boiler feed water, and lubricating oils. During wartime the KGVs would have gained displacement,...
by Dave Saxton
Mon May 06, 2019 8:03 pm
Forum: Bismarck General Discussion
Topic: British postwar tests on armor
Replies: 83
Views: 3506

Re: British postwar tests on armor

Tirpitz was in Kaa Fjord during the Sept 15th attack when the bow was wrecked. It then was transferred to Tromso. Kaa Fjord is deep. About 40 meters deep. The Tromso anchorage was not deep. It was thought there would only be about 1.5 meters between the keel and the sea bed at the selected anchorage...
by Dave Saxton
Sun May 05, 2019 10:19 pm
Forum: Bismarck General Discussion
Topic: British postwar tests on armor
Replies: 83
Views: 3506

Re: British postwar tests on armor

Gentlemen, Did any of the 'Tallboys that hit Tirpitz go right through the ship and out of the bottom? I looked up Brown: The hit scored on Sept 15 passed through the flare of the bow and out the side before bursting about 15 meters below the bottom of the bows as a gigantic mine. There were no hits...