The NEW PHASE in the ATLANTIC U-BOAT WARFARE
... This drawing depicts an incident during a recent battle in the Atlantic when three U-boats were sunk and three others damaged. The Sunderland had sighted two U-boats in company about fifty yards apart, twenty miles from a convoy: both of them were of a large type, powerfully armed, but the Sunderland captain did not hesitate to attack. Depth-charges were dropped in the first attack, but ...