Monitoring Günther Prien

1st October 1940: Naval Intelligence tracks the patrols of one of the Nazi's 'U-Boat heroes'

Convoy protection. Sunderland L2163/DA-G, one of a pair from No 210 Squadron, over convoy TC6 carrying Canadian troops to Britain, 31 July 1940. The convoy had left Halifax, Nova Scotia, on 23 July and was due to arrive at Greenock on 1 August. The vessel in the background which the censor has circled for blocking out is the H Class Destroyer HMS HIGHLA…