Battle of Audierne Bay

Battle of Audierne Bay Part of Battle of the Atlantic, Invasion of Normandy 6-inch guns of HMS Mauritius firing during the action in Audierne Bay 23 August 1944 Date 23 August 1944 Location Bay of Audierne between Brest and Lorient, France Result Allied victory Belligerents United Kingdom Canada Germany Commanders and leaders William Davis Unknown Strength 1 cruiser 2 destroyers 10 armed ships Casualties and losses None 8 ships sunk

Atlantic Campaign America Northern Barrage Caribbean St. Lawrence Gibraltar Timeline River Plate HX 72 SC 7 HX 79 HX 84 HX 90 SC 19 Berlin HX 106 HG 53 OB 293 HX 112 4 April 1941 OB 318 HX 126 Denmark Strait Bismarck OG 69 OG 71 SC 42 HG 73 SC 48 HG 76 2nd Happy Time Torpedo Alley Neuland ON 67 27 March 1942 OG 82 6 June 1942 HG 84 SL 78 QS 15 SC 94 ON 122 QS 33 ON 127 Laconia SC 100 SC 104 HX 212 SL 125 SC 107 Casablanca ON 144 ON 154 TM 1 SG 19 SC 118 ON 166 UC 1 SC 121 HX 228 UGS 6 HX 229/SC 122 Black May ONS 5 SC 129 SC 130 ONS 18/ON 202 SC 143 ONS 20/ON 206 Sept-Îles SL 138/MKS 28 SL 139/MKS 30 SL 140/MKS 31 Stonewall Bay of Biscay Lyme Bay 26 April 1944 13 May 1944 HX 300 WEP 3 BX 141 Teardrop Operation Overlord Invasion of Normandy Prelude Atlantic Wall Bodyguard Fortitude Zeppelin Titanic Taxable, Glimmer & Big Drum Combined Bomber Offensive Pointblank Transport Plan Postage Able Tarbrush Tiger Fabius Initial airborne assault British sector Deadstick Tonga Merville Battery Mallard American sector Albany Boston Chicago Detroit Elmira Normandy landings American sector Omaha Utah Pointe du Hoc Anglo-Canadian sector Gambit Sword Juno Gold Port-en-Bessin Initial ground campaign American sector Brécourt Manor Graignes Hill 30 Saint-Lô Carentan Cherbourg Anglo-Canadian sector Caen Bréville Perch Villers–Bocage Le Mesnil-Patry Douvres Martlet Epsom (1st Odon) Windsor Charnwood Jupiter 2nd Odon Atlantic Goodwood Verrières Ridge Breakout Cobra Spring Bluecoat Totalize Lüttich Tractable Hill 262 Chambois Falaise Brest Paris Air and sea operations Ushant La Caine Cherbourg Pierres Noires Audierne Bay Supporting operations Dingson Samwest Titanic Cooney Jedburgh Pluto Mulberry Dragoon Aftermath Cemeteries

The Battle of the Audierne Bay took place on 23 August 1944 and was an engagement between German and Allied naval flotillas. Three Allied warships, which had already established control off the coast of Brittany and were lurking off Audierne south of the invested fortress of Brest, intercepted and sank eight German vessels of an armed convoy. This was the conclusion of Operation Kinetic; an allied plan to intercept shipping and hinder Germans besieged at Brest.^[1]

Background

By 11 August, the Mortain counter-offensive had ground to a halt. To the east, US forces took Argentan on 13 August while British and Canadian forces closed in toward Falaise from the north, thus initiating the drive to encircle and destroy two German armies inside the Falaise Pocket. As the siege of the Breton ports continued, the focus of the war was quickly shifting further east.^[2]

Operation Kinetic had been set up by the Royal Navy Command Headquarters; the objective of which was to eliminate the German navy all along the French Atlantic ports.^[3] Of three Forces of Kinetic - Force 27 under the command of William Davis, consisting of the light cruiser HMS Mauritius and the destroyers HMS Ursa and HMCS Iroquois, departed Plymouth on 13 August to carry out a new patrol along the central section of the Biscay coast. With the Germans under the command of Marinegruppenkommando West on the move to evacuate by sea, the ongoing Kinetic had already scored two successes and was finalizing for the naval offensive in the Bay of Biscay to complete the success.^[4]

On the night of 22/23 August, under orders from naval intelligence the cruiser HMS Mauritius and the destroyers HMCS Iroquois and HMS Ursa were patrolling Audierne Bay between Brest and Lorient and radar soon picked up a large contact heading towards them.^[5]

Battles

Davis ordered Iroquois; the ship closest to the contact, commanded by James Calcutt Hibbard to use the Type 293 radar and relay the information to the rest of the force.^[2] Hibbard placed so much confidence in the radar that he decided to direct the opening moves from the Action Information Centre rather than the bridge, and then gave the order to illuminate with starshell. As a result, Force 27 was able to close undetected and launched a surprise attack on the known convoy which were three ships.^[1]

HMCS Iroquois going in to torpedo one of the German ships driven aground

At 0213 Iroquois scored the first hit on flak ship, which was subsequently set on fire. A second flak ship was quickly destroyed by the heavy guns from Mauritius, while another was set on fire and driven onto the shoals. Only nineteen minutes after opening fire, all three German ships had been put out of action, with two sunk and the third aground and burning.^[2]

Radar plotters Able Seamen William Ewasiuk and Harry Henderson of HMCS Iroquois, 21 August 1944

In a second action two hours later, Iroquois detected another convoy of four ships departing from the harbour of Brest: an M-class minesweeper, two flak ships and a converted mine-destructor ship, or "Sperrbrecher".^[4] Using the radar on Iroquois again, Force 27 stalked the convoy at long range until 0408, when the German ships were illuminated with starshell. Upon opening fire, the British and Canadians quickly overwhelmed the convoy sinking two vessels and causing two others to collide in the confusion and burst into flames as they raced for shore, with surviving crew members jumping over the side as they went. One of these vessels capsized and sank while the other drove onto the rocks at full speed and exploded.^[4]

At dawn, Force 27 continued with another sweep around Audierne Bay in order to confirm the destruction of the German convoy.^[1] In the process a minesweeper came into view and was pounded with gunfire and driven onto a reef near Port Audierne. Iroquois finished off the minesweeper with a torpedo, while Ursa sent on a boarding party onto the other grounded vessel to grab eleven prisoners. The other one hundred and fifty survivors who were able to swim to shore were subsequently taken prisoner by the French Resistance. This was the last part of the action and the force consolidated and reviewed the damage they had caused.^[2]

Aftermath

The final tally for the night was eight ships destroyed: one minesweeper driven ashore and heavily damaged, a flak ship, five armed trawlers, and the Sperrbrecher.^[1] Iroquois alone had fired a total of 1,197 rounds of 4.7-inch along with 231 rounds of starshell. Davis in his report attributed the success of the night's action to two principal causes: "some lucky guesses, and the excellence of Iroquois' radar and plotting teams".^[4] Although not known to Davis, it was actually Ultra intelligence that bore some responsibility for the luck of those guesses.^[2]

In the last week of August, another naval operation commenced, this time called Operation Assault, during which the cruiser HMS Bellona patrolled along the Biscay coast from Belle Isle near Lorient to Arcachon Point, south-west of Bordeaux. Continuing these sweeps through the remainder of the month, the Royal Navy and the Royal Canadian Navy patrolled off the coast. They sent landing parties ashore on the French mainland and outlying islands to secure them and ensured they were eliminated as potential bases of logistical supply to the Germans. The blockade of these Biscay ports, however, achieved impressive results independent of the campaign on land.^[4]

By the close of the Operation Kinetic, the combined Allied naval and air offensive eventually resulted in the reorganization of Kriegsmarine forces operating from fortress ports along the coast into Marineoberkommando West.^[3]

References

Citations

Sources

• German, Tony (1990). The Sea Is at Our Gates: The History of the Canadian Navy. McClelland & Stewart Limited. ISBN 9780771032691. 
• Paterson, Lawrence (2001). First U-Boat Flotill. Pen and Sword. ISBN 9780850528169. 
• Schull, Joseph. The Naval Service of Canada : Its Official History - The Far Distant Ships - An Official Account of Canadian Naval Operations in the Second World War . Minister of National Defense du Canada. 
• O'Hara, Vincent P. (2004). The German Fleet at War, 1939-1945. Naval Institute Press. ISBN 1-59114-651-8. 

External links

Wikimedia Commons has media related to Battle of Audierne Bay.

• "V-414 (ex-Sachsenwald)". Wreck Site. Retrieved 28 May 2014.