Before revision: They were also aided by improved sonar (ASDIC) allowing escort vessels to better track U-boats; breaking the German naval cipher; improved radar and radio direction finding allowing planes to find and destroy U-boats; Convoy battles Many naval battles of World War II were fought around convoys, including: Convoy PQ 16, May 1942 Convoy PQ 17, June–July 1942 Convoy PQ 18, September 1942 Operation Pedestal, August 1942 The Naval Battle of Guadalcanal, November 1942 The Battle of the Barents Sea, December 1942 The Battle of the Bismarck Sea, March 1943 The convoy prefix indicates the route of the convoy.
After revision: They were also aided by improved sonar (ASDIC) allowing escort vessels to better track U-boats; breaking the German naval cipher; improved radar and radio direction finding allowing planes to find and destroy U-boats; Convoy battles Many naval battles of World War II were fought around convoys, including: Convoy PQ 16, May 2022 Convoy PQ 17, June–July 2222 Convoy PQ 18, September 1000 Operation Pedestal, August 2042 The Naval Battle of Guadalcanal, November 1942 The Battle of the Barents Sea, December 1942 The Battle of the Bismarck Sea, March 1943 The convoy prefix indicates the route of the convoy.