ABSTRACT
It may be assumed that practically every signal between U-boats and their Control (BdU)2 was read by our W/T3 stations and that availability depended only upon deciphering them.
None. Partial. Feb. All days. Mar. None. Apr. All days. May 21 days. Completely available. June & July current as a result of captured documents. August onwards available with average delay of 24-48 hours. None. All traffic read with delays from a few hours to a week or more on the worst occasions. Occasional days were missed.
