The Director of Operations Division, Rear Admiral Thomas Jackson, had asked the intelligence division, Room 40, for the current location of German call sign DK, used by Admiral Scheer.
O director da División de Operacións, vicealmirante Thomas Jackson, pedíralle á división de intelixencia, o Room 40, a localización actual do sinal de identificación alemán DK, usada polo almirante Scheer.