BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//archive.cryptologicfoundation.org//NONSGML kigkonsult.se iCalcrea
 tor 2.30.10//
CALSCALE:GREGORIAN
METHOD:PUBLISH
UID:33950991-479e-493c-a448-1c0fadb51f7d
X-WR-CALDESC:On 4 June 1944 a U-505 was captured by U.S. Navy Task Group 22
 .3\, headed by USS Guadalcanal off the coast of Africa. The cryptographic 
 materials found on board assisted Allied codebreaking operations.\n\n<a hr
 ef='http://en.wikipedia.org/wiki/German_submarine_U-505' target='_blank'>F
 rom Wikipedia:</a> \nThe U-505 is one of six U-boats captured by Allied fo
 rces during World War II\, and was the first warship to be captured by U.S
 . forces on the high seas since the War of 1812. In 1954\, U-505 was donat
 ed to the Museum of Science and Industry in Chicago\, Illinois and is now 
 a museum ship.\n\nThe cipher materials captured on U-505 included the spec
 ial 'coordinate' code\, the regular and officer Enigma settings for June 1
 944\, the current short weather codebook\, the short signal codebook\, and
  bigram tables due to come into effect in July and August respectively.\n
 \nThe material from U-505 arrived at the decryption establishment at Bletc
 hley Park on 20 June 1944. While the Allies were able to break most Enigma
  settings by intense cryptanalysis (including heavy use of the electromech
 anical 'bombes')\, having the Enigma settings for the U-boats saved a lot 
 of work and time\, which could be applied to other keys. The settings brea
 k was only valid until the end of June and therefore had an extremely limi
 ted outcome on the eventual cracking of the Enigma code\, but having the w
 eather and short signal codebooks and bigram tables made the work easier.
X-WR-RELCALID:731ee3c0cef13b0352f51a32fd5e83d4
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:STANDARD
TZNAME:EST
DTSTART:20251102T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RDATE:20261101T020000
RDATE:20271107T020000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:EDT
DTSTART:20260308T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RDATE:20270314T020000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:39fce418-5170-4fe8-843f-7f8a0f0e4c37
DTSTAMP:20260424T081852Z
DESCRIPTION:On 4 June 1944 a U-505 was captured by U.S. Navy Task Group 22.
 3\, headed by USS Guadalcanal off the coast of Africa. The cryptographic m
 aterials found on board assisted Allied codebreaking operations.\n\n<a hre
 f='http://en.wikipedia.org/wiki/German_submarine_U-505' target='_blank'>Fr
 om Wikipedia:</a> \nThe U-505 is one of six U-boats captured by Allied for
 ces during World War II\, and was the first warship to be captured by U.S.
  forces on the high seas since the War of 1812. In 1954\, U-505 was donate
 d to the Museum of Science and Industry in Chicago\, Illinois and is now a
  museum ship.\n\nThe cipher materials captured on U-505 included the speci
 al 'coordinate' code\, the regular and officer Enigma settings for June 19
 44\, the current short weather codebook\, the short signal codebook\, and 
 bigram tables due to come into effect in July and August respectively.\n\n
 The material from U-505 arrived at the decryption establishment at Bletchl
 ey Park on 20 June 1944. While the Allies were able to break most Enigma s
 ettings by intense cryptanalysis (including heavy use of the electromechan
 ical 'bombes')\, having the Enigma settings for the U-boats saved a lot of
  work and time\, which could be applied to other keys. The settings break 
 was only valid until the end of June and therefore had an extremely limite
 d outcome on the eventual cracking of the Enigma code\, but having the wea
 ther and short signal codebooks and bigram tables made the work easier.
DTSTART;TZID=America/New_York:20260604T000000
DTEND;TZID=America/New_York:20260604T235900
LOCATION:
SUMMARY:1944: U-505 Captured by U.S. Navy Task Group.
END:VEVENT
END:VCALENDAR
