U-2548 returned from her 6th patrol with 20,000 tonnes after a frustrating patrol. Severe weather produced almost three weeks without any contact with the enemy, until two convoy reports finally lifted the gloom.
Further more, the sinking of an Auxiliary Cruiser in one such convoy, West of Gilbraltar, left everyone rather satisfied with a difficult patrol.
June 1st 1940 - U-2548 Assigned to patrol AN87
Near Dunkirk apparently.
