[Nick Beale]

Originally Posted by Stephen M. Fochuk

Here, Sergey,

You can start digging here for that information. Please post your findings when done.

https://www.nationalarchives.gov.uk/...ce-operations/

Many thanks,

Stephen

Also, available online are the Seekriegsleitung war diaries in German or English translation. A first-hand source, deciphered German naval signals, can be viewed or downoaded free from the UK National Archives (use the advanced search option and put ZTPG in the box for "Exact word or phrase"; under "any of these references" type in DEFE 3).

Also there is file ADM 223/4: "Enemy vessels sunk or damaged in home waters" for the year 1943.