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Date: 2006-03-07 10:03:23 Score: 5211199 UKW: B W/0: B241 Stecker: ATCLDHEPFGIOJNKQMURX Rings: AANV Message key: MCSF vvvjschreederjaufgeleitkursfuenffuenfgradnichtsgefundenymarscaierebefohlenes quadratxstanrortmarquantonjotadreineunneunfuenfxsssooovieryseedremyeinsnulyy einsnulbedecktyzwoachtmbsteigtynbbelsichteinssmt
Dan Girard had already told me privately that this might be the plaintext for the third signal. That was two weeks ago. Well spotted, Dan! - Of course the message had to be broken first to be sure. The plaintext of the message appears in the war diary of U623, which can be found at NARA, Microfilm Publication T1022, Roll 3385.
0425 Ausgang FT. 0246/21/203: Auf Geleitkurs 55° nichts gefunden, marschie- re befohlenes Qu. Standort Marqu. AJ 3995. SO 4, See 3, 10/10 bedeckt, 28 mb steigend, Nebel, Sicht 1 sm. Schroeder
0425 Outgoing Radio Signal 0246/21/203: Found nothing on convoy's course 55°, [I am] moving to the ordered [naval] square. Position naval square AJ 3995. [wind] south-east [force] 4, sea [state] 3, 10/10 cloudy, [barometer] [10]28 mb [tendency] rising, fog, visibility 1 nautical mile. Schroeder
0246/21/203: time/date/message serial number AJ 3995: German naval grid reference, 56-33 N, 37-36 W Schroeder Hermann Schröder, Oberleutnant zur See on U623
Thanks to Dan Girard, Ralph Erskine and several people on the mailing list for providing the necessary information and corrections.