Hello Brian,
many thanks for your quick reply.
I got the notes and dates from E. Gröner "Die deutschen Kriegsschiffe 1818-1945" p. 211.
He writes the action with MTB and "Jabo" (fighter bomber) on 13.6.1944 was "near" St. Malo.
Thats all I know.
By the way: the ship was later repaired and became fishtrawler "ESSEN" BX 343 after the war. 1956 converted to cargovessel "HANS PETER" of Heiligenstedten/Ge, 1970 brit. "HANDSOME", 1971 panam. "HANDSOME I", 1979 liban. "WALID", 1980 "SAMIR"; 1985 lost.
All the best,
Herbert