sentences:  In January 1940 she returned to home waters and was employed on interception patrols in the North Sea.This involved searching for U-boats, surface raiders and blockade runners, and she was active in this capacity during the Norwegian campaign.On 13 May 1940, while on patrol in Scandinavian waters on the surface, "Clyde" met the German auxiliary cruiser , resulting in an exchange of gunfire which lasted for over an hour, with no hits for either side.