Operation Cerberus

The Channel Dash (german: Unternehmen Zerberus, Operation Cerberus) was a German naval operation during the Second World War. (Cerberus), a three-headed dog of Greek mythology who guards the gate to Hades. A (German Navy) squadron comprising the two s, the heavy cruiser and their escorts was evacuated from Brest in Brittany to German ports. ''Scharnhorst'' and ''Gneisenau'' had arrived in Brest on 22 March 1941 after the success of Operation Berlin in the Atlantic. More raids were planned and the ships were refitted at Brest. The ships were a threat to Allied trans-Atlantic convoys and RAF Bomber Command attacked them from 30 March 1941. ''Gneisenau'' was hit on 6 April 1941 and ''Scharnhorst'' on 24 July 1941, after dispersal to La Pallice. In late 1941, Adolf Hitler ordered the (OKM; German Navy High Command) to plan an operation to return the ships to German bases against a British invasion of Norway. The short route up the English Channel was preferred to a detour around the British Isles for surprise and air cover by the and on 12 January 1942, Hitler gave orders for the operation.

The British exploited decrypts of German radio messages coded with the Enigma machine, air reconnaissance by the RAF Photographic Reconnaissance Unit (PRU) and agents in France to watch the ships and report the damage caused by the bombing. Operation Fuller, a joint Royal Navy-RAF contingency plan, was devised to counter a sortie by the German ships against Atlantic convoys, a return to German ports by circumnavigating the British Isles, or a dash up the English Channel. The Royal Navy had to keep ships at Scapa Flow in Scotland in case of a sortie by the from Norway. The RAF had sent squadrons from Bomber and Coastal commands overseas and kept torpedo bombers in Scotland ready for ''Tirpitz'', which limited the number of aircraft available against a dash up the Channel, as did the winter weather which reduced visibility and blocked airfields with snow.

On 11 February 1942, the ships left Brest at and escaped detection for more than twelve hours, approaching the Strait of Dover without discovery. The provided air cover in (Operation Thunderbolt) and as the ships neared Dover, the British belatedly responded. Attacks by the RAF, Fleet Air Arm, Navy and bombardments by coastal artillery were costly failures but ''Scharnhorst'' and ''Gneisenau'' were damaged by mines in the North Sea (''Scharnhorst'' was out of action for a year). By 13 February, the ships had reached German ports; Winston Churchill ordered an inquiry into the and ''The Times'' denounced the British fiasco. The judged the operation a tactical success and a strategic failure because the threat to Atlantic convoys had been sacrificed for a hypothetical threat to Norway. On 23 February, ''Prinz Eugen'' was torpedoed off Norway and after being repaired, spent the rest of the war in the Baltic. ''Gneisenau'' went into dry dock and was bombed on the night of never to sail again; ''Scharnhorst'' was sunk at the Battle of the North Cape on 26 December 1943.

Background

Port of Brest, 1940–1941

German commerce raiding against British north Atlantic convoys was made easier by the capture of Norway and France in 1940. An abortive sortie by the cruiser ended at Brest, at the west end of the Brittany peninsula, on 27 December 1940. After five weeks of bombing by RAF Bomber Command to no effect, the ship put to sea on 1 February 1941, sank numerous ships and returned on 14 February, before sailing to Germany using the roundabout route via the Denmark Strait the next day, reaching Kiel on 28 March. The commerce raids in the north Atlantic during the winter of 1940–1941 by ''Scharnhorst''-class battleships and , the heavy cruisers and ''Admiral Hipper'' sank of British shipping, a higher rate than German surface ships achieved for the rest of the war. The British reformed 19 Group for Coastal Command in January 1941, which kept watch on the German ships at Brest; ''Scharnhorst'' and ''Gneisenau'' arrived at the port of Brest on 22 March 1941.

British air offensive, 1941

From 10 January to mid-April 1941, Bomber Command aimed of bombs at the ships in Brest harbour. Winston Churchill issued the Battle of the Atlantic directive on 9 March, directing the priority of the British war effort temporarily to counter the German campaign against Atlantic convoys. 1 PRU of the RAF discovered ''Scharnhorst'' and ''Gneisenau'' in port on 28 March and Bomber Command flew about against the ships in Brest, through poor weather for the next two months. ''Gneisenau'' needed an overhaul of her engine room and entered dry dock on 4 April. When the water was pumped out of the dry dock, an unexploded bomb was found between the stocks under the ship. The ship had to be carefully refloated and removed before the bomb could be defused. ''Gneisenau'' was moored in an exposed position in the roadstead, where it was photographed by a 1 PRU Spitfire on 5 April. Bristol Beaufort torpedo bombers attacked at dawn next day; one aircraft found the harbour through the haze and torpedoed ''Gneisenau'' on the starboard side, seriously damaging the reserve command centre.

''Gneisenau'' went back into dry dock and on the night of it was hit four times and suffered two near misses. One of the hits did not explode but the others jammed 'B' turret and distorted the armoured deck near it, made about a third of the crew quarters uninhabitable by fire and blast damage, destroyed the kitchens and bakery and affected some gunnery control systems. ''Scharnhorst'' was not damaged but the bomb hits on the docks delayed its refit, which included a substantial overhaul of its machinery; the boiler superheater tubes had a manufacturing defect that had plagued the ship throughout Operation Berlin. Repairs had been expected to take ten weeks but delays, exacerbated by British minelaying in the vicinity, caused them to miss (Operation Rhine Exercise). The sortie by and into the North Atlantic went ahead and ''Bismarck'' was sunk; ''Prinz Eugen'' returned to Brest on 1 June. The loss of ''Bismarck'' severely limited the freedom of action of the German surface fleet, after Hitler ordered that capital ships must operate with much greater caution.

During the summer, small formations of the new RAF four-engined heavy bombers attacked ''Gneisenau'', ''Prinz Eugen'' and ''Scharnhorst''; ''Prinz Eugen'' was hit on the night of and put out of action. The sailing on 21 July of ''Scharnhorst'' to La Pallice, the deep-water port of La Rochelle down the French Atlantic coast, forestalled an attempt by Bomber Command to attack the ships in Brest by surprise. ''Scharnhorst'' was attacked by six Short Stirling bombers on the evening of 23 July; about six German fighters intervened and one bomber was shot down. The attack on Brest took place in daylight on 24 July, with a loss of La Pallice was bombed again by fifteen Handley Page Halifaxes. One bomber failed to find La Pallice and the rest were met by and anti-aircraft fire () and all were hit, affecting their bomb aiming. Five bombers were shot down, five were seriously damaged and ''Scharnhorst'' was hit five times. While returning to Brest containing of seawater, Scharnhorst was attacked by a Beaufort but shot it down before it could drop its torpedo.

From 28 March to the end of July, of bombs were dropped in Bomber Command, which also sent sorties, with another Coastal Command, laying off Brest; the British lost three being minelayers. For the next two months, Bomber Command made frequent small attacks, then attacked on the night of followed by on the night of Frequent small attacks were resumed and about were made from July to December. At the start of the month, the Brest Group was made the Bomber Command priority again and from 11 December, bombing and minelaying took place nightly. When ''Prinz Eugen'' was found out of drydock on 16 December, a plan for a big night raid followed up by a day raid was implemented, with a raid on the night of and a daylight raid by bombers on the afternoon of 18 December, escorted by ten fighter squadrons. ''Gneisenau'' was slightly damaged and dock gates were smashed, stranding ''Scharnhorst'' for a month, for a loss of six bombers. Heavy attacks continued all month and another day raid by Halifaxes was made on 30 December. From 1 August to 31 December, of high explosive and of incendiaries were dropped, eleven heavy bombers were shot down and considerable damage was inflicted on the docks and the town but none of the ships were hit again. ''Gneisenau'' was damaged on the evening of 6 January and 37 percent of Bomber Command sorties between 10 December and 20 January 1942 were flown against the ships at Brest.

Ultra

Ultra was the code name used by British military intelligence for signals intelligence obtained by breaking German radio and teleprinter communications, including signals encrypted by Enigma, a German electro-mechanical rotor cipher machine. The decryption was carried out at the Government Code and Cypher School (GC&CS) at Bletchley Park and the information was passed on to operational commands. From May 1941, Bletchley could read the Enigma ''Home Waters'' setting used by surface ships with few failures or interruptions, which combined with the PRU and reports from agents kept watch on the ships at Brest. By April 1941, the British knew that the three ships had been hit but not the extent of the damage.

From 16 to 23 December, Enigma decrypts showed that the gunners of the ships were on the Baltic, conducting gunnery training. Next day, the Admiralty warned that an attempt to break out was likely. On 25 January 1942, the ships were photographed in the harbour and two short periods in dry dock by two ships were seen. From the end of January to early February, torpedo boats, minesweepers and destroyers joined the big ships; together with news that the battleship ''Tirpitz'' in Norway had moved to the south, this led the Admiralty to issue an appreciation on 2 February that the three ships were going to attempt to sail up the channel and sent the signal ''Executive Fuller'', the order to begin the operation to prevent the German Fleet from breaking into the North Atlantic. Next day Enigma and RAF photographic reconnaissance (PR) found that the number of German ship reinforcements from Brest to the Hook of Holland had risen to seven destroyers, ten torpedo-boats, more than and many smaller craft.

Norway Hypothesis

During 1941, Hitler decided that the Brest Group should return to home waters in a "surprise break through the Channel", as part of a plan to thwart a British invasion of Norway. OKM preferred the Denmark Strait passage to Germany and (Grand Admiral) Erich Raeder called a journey along the English Channel impossible. Hitler said that the break-out should be planned with no training period, since British intelligence was bound to find out and have the ships bombed. Hitler ordered that a period of bad weather should be chosen, when the bulk of the RAF would be grounded. (vice admiral) Kurt Fricke (Chief of Staff of the SKL, Maritime Warfare Command) opposed Hitler but was allowed only a short time to review the policy. On 12 January 1942, Raeder again opposed the channel route but planned for it, provided that Hitler took the final decision.

Hitler noted that the ships at Brest had diverted British bombing from Germany but that the advantage would end as soon as the ships were sufficiently damaged. Vice Admiral Otto Ciliax outlined a plan for a standing start at night to gain surprise and to pass the Strait of Dover, wide and the narrowest part of the Channel, during the day, to benefit from fighter cover at the danger point. The refused to guarantee that the available could protect the ships but Hitler accepted the plan. Hitler ordered that the battleship ''Tirpitz'', already in Norway, was to be moved south to Trondheim. At a conference on 22 January, Hitler announced that all ships and U-boats should assemble for the defence of Norway and on 25 January, Karl Dönitz (, BdU, Commander of Submarines) was ordered to withdraw eight submarines to patrol off Iceland, the Faroe Islands and Scotland. Despite protests from Dönitz, another twelve U-boats were reserved for Norway, along with the surface ships being concentrated in Norwegian waters.

Prelude

Operation Cerberus

Hitler preferred the Channel route and responsibility was delegated to (Naval Command West, Admiral Alfred Saalwächter) for planning and operational directions; Ciliax, was commander of the Brest Group (flagship, ''Scharnhorst''). Care was taken to choose the best route to avoid British minefields and to steam at high speed. Minesweepers cleared channels through the British mines and marked with buoys (from 3 to 9 February, Bomber Command laid 98 mines in the channels). U-boats were sent for meteorological observations and several destroyers steamed westward down the Channel to Brest to strengthen the escort screen. To have the longest period of darkness possible, the departure was to be four days before the new moon and at to benefit from a spring tide flowing up the Channel, which would add speed and possibly lift the ships over mines.

Air cover was to be provided by the and six destroyers would escort the Brest Group on the first leg, to be joined by ten E-boats at dawn; a mixture of E-boats, R-boats and small craft would join at Cap Gris Nez. During January, the and rehearsed for the operation but the ships had lost seaworthiness and many technicians and experts had been transferred from Brest to more pressing duties. By 9 February, the ships had completed their trials in Brest roads and the sortie was set for 11 February. Morale of the crews was high, no sabotage had occurred at Brest and the crews went ashore freely. Among locals there was no doubt that the ships were preparing to depart and as a deception, tropical helmets were brought on board, French dock workers loaded oil barrels marked "For Use in the Tropics" and false rumours were spread around town.

Hans Jeschonnek, chief of staff, refused to guarantee the success of Cerberus or to reinforce the fighter forces in the west. Adolf Galland was given command of the air operation, to be called (Operation Thunderbolt). Details of the plan were arranged with (Colonel) Karl Koller, chief of staff of (Air Fleet 3 Hugo Sperrle). Some training units were mobilised to make up for the bulk of the being absent in the Soviet Union. The (signals intelligence service, General Wolfgang Martini) attempted to jam British radio-telephone frequencies by using a technique to increase atmospheric interference and reduced the performance of British coastal radars by slowly increasing their jamming. Dornier Do 217s of (Bomber Wing 2) were to fly electronic deception sorties over the western Channel to divert British aircraft. ( ir Force GeneralJoachim Coeler) prepared to bomb RAF bases in south-western England and to attack British naval forces attempting to intercept the Brest Group. ''Fernaufklärungsgruppe'' 123 (Long-range Reconnaissance Wing 123) was to keep watch on both ends of the Channel and support .

The convoy route was divided into three sectors using the (Fighter Sector) boundaries but to ensure local control Max Ibel, the former commander of (Fighter Group 27) was appointed (, Fighter Controller: Ship) and embarked on ''Scharnhorst'' as a signals officer to communicate with units during the operation. Eight rehearsals, involving around were made from 22 January to 10 February. The (day fighter wings) and the night fighters of (Night Fighter Wing 1), were swiftly to prepare aircraft for the next sortie by rearming and refuelling in no more than thirty minutes. Galland decided that the aircraft should fly high and low cover, the low groups flying under British coastal radar. A standing patrol of least was to be maintained, in two formations of eight aircraft for their patrol altitudes, with each formation in two of four aircraft. One was to fly out to sea and one towards land in a zigzag and all were to fly back and forth along the line of ships in wide figures of eight, in radio silence. Every sortie was timed to allow the fighters over the ships, just enough time for relieved units to refuel, rearm and return. During , the relieving sortie arrived after only 20 minutes which meant that fighter cover for half the dash would be

Operation Fuller

In April 1941, the Royal Navy and the RAF devised Operation Fuller, a plan for combined operations against the ships in Brest should they sortie. Vice-Admiral Bertram Ramsay of the Dover Command was to be responsible for operations to confront a German squadron sailing up the Channel, with continuous co-ordinated attacks by Coastal Command, the Navy and RAF. British coastal radar had a range of about and with the five standing air patrols, the planners expected a dash up the Channel easily to be discovered, even at night or in bad weather. As soon as the alarm was raised, the offensive provisions of Fuller would begin. The of the Dover and Ramsgate flotillas, with a Motor Gun Boat (MGB) escort, would make torpedo attacks from . The boats would be followed up by Fairey Swordfish torpedo-bombers with fighter escorts and by Beaufort torpedo-bombers; the Dover Strait coastal guns#British guns, coastal guns at Dover would fire for as long as the ships were in range; Bomber Command would attack any ship damaged enough to have been slowed or brought to a stop.

As the German ships moved beyond the Straits of Dover, six Harwich-based destroyers of the Commander-in-Chief, The Nore, Nore Command would make torpedo attacks and the RAF would continue bombing and also lay mines in the paths of the ships. Bomber Command intended to have at four hours' notice (about of its operational strength), by reserving around from each group. Of the other half would continue operations against Germany and the rest would be preparing for operations next day. The aircraft reserved for Fuller were rotated and weather permitting, bomb Brest. Fighter Command would escort the torpedo-bombers with fighters from No. 10 Group RAF, 10 Group in the south-west and the squadrons of 11 Group in the south-east. Each service arm had exchanged liaison officers at headquarters and operations rooms but did not use a common communications system.

Readiness

The preliminaries of the German manoeuvre, especially minesweeping in the Channel and the transit of destroyers to Brest, led the Admiralty to issue a forecast that a sortie into the Atlantic was improbable and that a move to sheltered waters by a dash up the Channel rather than via the Denmark Strait or into the Mediterranean to Italian ports was to be expected. Next day the Nore Command was ordered to keep six destroyers on call in the Thames and be ready to send six torpedo boats to reinforce those at Dover. The fast Abdiel-class minelayer, ''Abdiel''-class minelayers and were detached to Plymouth Command to mine the Brest approaches and to Dover to mine the eastern exit of the Channel respectively. Most submarines were in the Mediterranean but two training boats were sent into the Bay of Biscay. On 6 February, the only modern submarine in home waters, was allowed to sail into Brest Roads, the commander using information supplied through Ultra on minefields, swept channels and training areas. The six operational Swordfish torpedo-bombers of 825 Naval Air Squadron, 825 Squadron Fleet Air Arm [FAA] (Lieutenant-Commander Eugene Esmonde) were moved from RNAS Lee-on-Solent (HMS Daedalus), RNAS Lee-on-Solent to RAF Manston in Kent, closer to Dover.

The RAF alerted its forces involved in Operation Fuller to indefinite readiness and on 3 February, 19 Group, Coastal Command began night reconnaissance patrols by Air to Surface Vessel Mk II (ASV) equipped Lockheed Hudsons, supposedly able to detect ships at range. Patrol line ''Stopper'' was already being flown off Brest and ''Line South East'' from Ushant to the Isle de Bréhat and ''Habo'' from Le Havre to Boulogne began. Coastal Command had three Beaufort torpedo-bomber squadrons in Britain, No. 42 Squadron RAF, 42 Squadron at Leuchars Station, RAF Leuchars in Scotland, of No. 86 Squadron RAF, 86 Squadron and No. 217 Squadron RAF, 217 Squadron in Cornwall and seven 217 Squadron aircraft at Thorney Island (Portsmouth). Two days later, Enigma showed that Ciliax had joined ''Scharnhorst'' and with the recent exercises, led the Admiralty to predict an impending departure. On 8 February, in a break in the weather, PR found that the ships were still in harbour, ''Scharnhorst'' was in dock and that another two destroyers had arrived.

Air Chief Marshal Philip Joubert de la Ferté, Air Officer Commanding (AOC) Coastal Command, sent an appreciation to Fighter and Bomber commands, that a sortie could be expected any time after 10 February. The Coastal Command groups were alerted and 42 Squadron was ordered to fly its south to Norfolk (the move was delayed until next day by snow on the airfields in East Anglia). Air Vice Marshal Jack Baldwin (RAF officer), J. E. A. Baldwin, AOC Bomber Command, stood down half of its bombers and reduced the other from four to two hours' notice, without informing the Admiralty. On 11 February, ''Sealion'' moved towards Brest on the afternoon tide, found nothing and returned at to re-charge batteries, ready for another try the next day. The German ships had been scheduled to depart Brest at but were delayed by a Bomber Command raid, which had been ordered after photo-reconnaissance had found the ships still in harbour with torpedo booms deployed at For the previous week, Enigma had been providing information that the Germans were minesweeping on a route that made a dash up the Channel a certainty and with reference to captured charts gave away the German route, which was passed on by the Admiralty at on 12 February. (The daily naval Enigma Home Waters settings for took Bletchley Park until 15 February to break.)

Battle

Night, 11/12 February

A British agent in Brest was unable to signal that the Brest Group was departing because of German wireless jamming; ''Sealion'', patrolling outside the harbour, had withdrawn to recharge its batteries. Patrol ''Stopper'', near Brest, was being flown by an ASV Hudson from No. 224 Squadron RAF, 224 Squadron when the Brest Group assembled outside the port at At the patrol height of the ASV had a range of about but the Hudson was flying south-west as the ships turned towards Ushant and received no contact. The last eight minutes of the next ''Stopper'' sortie came within about of the ships but received no contact on the radar.

''Line South East'' ran past Ushant to the vicinity of Jersey, to find a sortie from Brest which had turned up the Channel. The Brest Group crossed ''Line South East'' at early on 12 February but the Hudson patrol was not there, having been ordered to return when its ASV failed. Joubert was short of aircraft and sent no replacement, also because ''Stopper'' had reported nothing untoward and if the Brest Group had sailed before ''Stopper'' began, it would already have passed ''Line South East''. ''Habo'', the third patrol line, from Cherbourg-en-Cotentin, Cherbourg to Boulogne-sur-Mer, Boulogne was conducted as usual, until a dawn fog was forecast over British airfields and the aircraft was called back at when the Brest Group was still west of the line.

12 February

Morning

The only patrol over the Channel was the routine dawn patrol by Fighter Command from Ostend, south to the mouth of the Somme (river), Somme, which the Brest Group passed at From RAF radar operators under Squadron Leader Bill Igoe, using an un-jammed radar frequency, noticed four plots of German aircraft circling in places north of Le Havre, which at first were thought to be air-sea rescue operations. At No. 11 Group RAF, 11 Group RAF Fighter Command realised that the plots were moving north-east at and sent two Spitfires to reconnoitre at about the time that news reached Fighter Command headquarters that radar-jamming had begun at and that the station at Beachy Head was detecting surface ships. Radar stations in Kent reported two large ships off Le Touquet at and when the Spitfire patrol landed at having kept radio silence, the pilots reported a flotilla off Le Touquet (near Boulogne) but not the capital ships.

News of the sighting was rushed to 11 Group and the Navy at Dover by (One pilot then mentioned a big ship and a certain sighting was received as he was being Debriefing, debriefed.) By coincidence, two senior fighter pilots from RAF Kenley had decided to fly an intruder mission to the French coast at while the other pilots were grounded due to the bad weather. The pair spotted two Messerschmitt Bf 109s (Bf 109) and attacked, then found themselves over a German flotilla of two big ships, a destroyer screen and an outer ring of E-boats. The Spitfires were dived on by about fighters and escaped through anti-aircraft fire from the ships, Strafing, strafed an E-boat and made off at wave-top height. After they landed at the pilots reported that the German ships had been off Le Touquet at by the alarm had been raised that the Brest Group was entering the Straits of Dover with air cover.

At Bomber Command had been alerted that the Brest Group was near Dover and warned the groups to be ready. Including aircraft that had flown the night before and those at four hours' notice, Air Marshal Richard Peirse had about but the on two hours' notice had been loaded with semi-armour-piercing bombs which were effective only if dropped from or higher. Visibility was poor with rain and to cover, down to and unless there were breaks in the cloud just when needed the task was impossible. Peirse ordered general-purpose bombs to be loaded, which could only cause superficial blast damage and attacks at low altitude, in the hope that the attacks would distract the Brest Group as Coastal Command and the Navy made torpedo attacks.

Noon

At Dover in 1940, there were four guns with a range of , two BL 9.2-inch Mk IX – X naval gun, guns with a range of , two modern 6-inch batteries with range and four more 9.2-inch guns on new mountings with a range of and then with supercharging. (After the fall of France, Axis ships could avoid the Dover mine barrage by sailing close to the French coast.) A supercharged naval gun could fire shells but was difficult to use against moving targets. The South Foreland Battery of the Dover guns, with their new K-type radar set, tracked the ships of the Brest Group coming up the Channel towards Cap Gris Nez.

At the Dover guns fired their first salvo but with visibility down to , there could be no Artillery observer, observation of the Indirect fire, fall-of-shot. The gunners hoped that the radar would detect the shell splashes and allow corrections to be made, although this method had never been tried before. "Blips" on the K-set clearly showed the ships zig-zagging but not where the shells were landing. Full battery salvo firing began and the four 9.2-inch guns fired at the German ships, which were moving out of range at and all missed. German sources state that the fleet had already passed Dover when the coastal artillery opened fire and that the shells landed well astern of the major German units. The coastal guns ceased fire when light naval forces and torpedo-bombers began to attack and by the German ships passed beyond the effective range of the British radar.

Afternoon

The six Swordfish torpedo-bombers of 825 Squadron FAA, took off from Manston at after Esmonde decided that he could wait no longer, meeting the Spitfire escorts of No. 72 Squadron RAF, 72 Squadron at all setting off for a point north of Calais. The escorts of 121 Squadron and 401 Squadron were late and tried to rendezvous en route to the ships but missed them and turned back to search for the Swordfish at Manston. The Spitfires of 72 Squadron flying close escort sighted the German ships at but were bounced by Bf 109s and FW 190s and lost contact with the Swordfish. The first section of three torpedo-bombers pressed on through the destroyer screen and Esmonde's aircraft was shot down before he could launch his torpedo. The other two aircraft continued through the German anti-aircraft barrage, dropped torpedoes and then ditched their aircraft which had been hit by flak. The second section of three Swordfish were seen to cross over the destroyer screen and disappear in the cloud and smoke. While the German fighter escorts were absent, two sections (eight aircraft) of No. 452 Squadron RAAF, 452 Squadron RAAF strafed several German ships and silenced the return fire of a destroyer, for a cracked perspex hood to one Spitfire.

The five operational Fairmile D motor torpedo boat, Motor Torpedo Boats (MTBs) based at Dover left harbour at and sighted the German warships, at The RAF fighter cover for this attack was not airborne in time, one MTB had engine-trouble and the rest found their approach blocked by twelve E-boats in two lines. The defective MTB fired torpedoes at the extreme range of before returning to Dover; the rest were not able to get much closer and torpedoed through the gap between the E-boat lines, mistakenly claiming a hit on ''Prinz Eugen''. Two motor gun boats (MGBs) arrived from Dover in time to defend the last MTB from a German Narvik-class destroyer. Two more MTBs had left Ramsgate at but approached from too far astern of the German squadron and were unable to get into a position to attack before deteriorating weather and engine problems forced them to turn back.

Several Westland Whirlwind (fighter), Whirlwind fighters on a routine patrol were intercepted by the fighter screen at The seven Beauforts at Thorney Island were closest to the Brest Group when it was sighted. Two Beauforts had been bombed up and one went unserviceable, before the other four took off at The four Beauforts were late to meet their fighter escorts at Manston and the torpedo-bombers and fighters were ordered independently to the German ships. The position, course and speed of the Brest Group was given by voice (radiotelephone, R/T) to the Spitfires and Morse (wireless telegraphy, W/T) to the Beauforts. The torpedo-bombers failed to receive the orders, because No. 16 Group RAF, 16 Group forgot that they had been fitted with R/T for Operation Fuller. When the Beauforts reached Manston they circled with numerous fighters which appeared to ignore them. Two Beauforts flew to the French coast, found nothing and landed at Manston where the confusion was resolved. The other two aircraft had already landed at Manston, where the crews found out what was going on and set off for the Belgian coast, arriving at (when the Nore Command destroyers were attacking). Both bombers flew through the German flak and attacked ''Prinz Eugen'', dropping their torpedoes at , to no effect.

The 42 Squadron Beauforts from Scotland had to divert to RAF Coltishall in Norfolk because of snow but the torpedoes to be loaded were over 100 miles away at RAF North Coates in Lincolnshire and came by road too late. Nine of the aircraft had flown south with torpedoes on and took off at leaving the other four behind to rendezvous with their fighter escorts and several Hudsons, intended to create a diversion. The Beauforts reached Manston at and tried to formate behind the Hudsons, which did the same thing; attempts to get the fighters to join the formation also failed. The Beaufort crews had been briefed that they would be escorted all the way, the fighters that they were to cover the Dover Strait in general and the aircraft circled Manston for thirty minutes, each formation under the impression that another one was leading. The Beaufort commander then set off, using the position of the Brest Group given at Coltishall and six Hudsons followed, the other five circling and waiting for the fighters, before giving up and landing at

The Beauforts and Hudsons flew towards the Dutch coast and lost touch in the cloud and rain but the Hudsons made ASV contact and attacked the ships, two being shot down for no result. Six of the Beauforts then attacked through the flak and released their torpedoes, also with no effect. (The other three Beauforts had already attacked, possibly against British destroyers.) The two 217 Squadron Beauforts that had flown earlier had reached Manston, set off again independently and made ASV contact, attacking ''Scharnhorst'' at The remaining Beauforts at St Eval in Cornwall had been sent to Thorney Island, arriving at to refuel and be briefed to link with fighters at Coltishall in East Anglia, where they arrived at to find no escorts waiting. The Beauforts pressed on to a position sent by wireless and at as dark fell, with visibility down to and the cloud base at only saw four German minesweepers. One bomber attacked a "big ship" but flak damage jammed the torpedo and as night fell around the rest turned for Coltishall; two Beauforts were lost to flak or the weather.

Evening

The first wave of Halifax and Stirling heavy bombers took off from and most found the target area from Thick low cloud and intermittent rain hid the view and only ten crews could see the German ships for long enough to bomb. The of the second wave took off from and reached the vicinity of the ships from and at least The last wave of began at and reached the Brest Group from and nine were able to drop their bombs. Only the aircraft that returned managed to attack the ships and were shot down by flak or lost after flying into the sea; twenty bombers were damaged and no hits were achieved.

The destroyers , of the List of squadrons and flotillas of the Royal Navy, 21st Flotilla and , , and of the 16th Flotilla (Captain Charles Pizey), from Nore Command were First World War-vintage and usually escorted east coast convoys. The ships were practising gunnery off Orford Ness in the North Sea when alerted at The destroyers sailed south to intercept the Brest Group but it steamed much faster than expected and to catch up, Pizey took the destroyers over a German minefield. At just before the destroyers attacked, north of the Scheldt Estuary, ''Scharnhorst'' had hit a mine and was stopped for a short time, before resuming at about . At the destroyers made radar contact at and visual contact at at ''Walpole'' had already dropped out with engine trouble; as the other five emerged from the murk, they were immediately engaged by the German ships. The destroyers pressed on to and two destroyers fired torpedoes; ''Worcester'' closed further and was hit by return fire from ''Gneisenau'' and ''Prinz Eugen'', then the last two destroyers attacked but all their torpedoes missed.

Night 12/13 and 13 February

''Scharnhorst'' had fallen behind after hitting a mine and at ''Gneisenau'' hit a magnetic mine off Terschelling. The mine exploded some distance from the ship, making a small hole on the starboard side and temporarily knocking a turbine out of action. After about thirty minutes, the ship continued at about and as ''Scharnhorst'' sailed through the same area, it hit another mine at both main engines stopped, steering was lost and fire control was damaged. The ship got under way with the starboard engines at making and carrying about of seawater. ''Scharnhorst'' arrived at Wilhelmshaven at on 13 February, with damage that took three months to repair. ''Gneisenau'' and ''Prinz Eugen'' reached the Elbe at and tied up at Brunsbüttel North Locks at After receiving Ultra intelligence about German minesweeping in the German Bight, Bomber Command had laid mines along the swept channel on 6 February and the next day. When the route of the channel was more accurately plotted on 11 February, four mines were laid, then more on 12 February when the Channel Dash was on. Enigma decrypts revealed the mining of the German ships but the news was kept secret by the British to protect the source.

Aftermath

Analysis

Ciliax sent a signal to Admiral Saalwächter in Paris on 13 February,

OKM called ''Cerberus'' a tactical victory and a strategic defeat. In 2012, Ken Ford wrote that the German ships had exchanged one prison for another and that Bomber Command raids from terminally damaged ''Gneisenau''. Operation Fuller had failed, a British destroyer had been severely damaged and had been lost in fighter, and Command sorties. British public opinion was appalled and British prestige suffered at home and abroad. A leading article in ''The Times'' read,

In 1955, Hans Dieter Berenbrok, a former officer, writing under the pseudonym Cajus Bekker, judged the operation a necessity and a success. He quoted Raeder "…we are all convinced we cannot leave the ships in Brest any longer". Raeder wrote that the operation was necessary because of a lack of training opportunities for the crews, lack of battle experience and the general situation made raiding operations in the "old pattern out of the question". According to Bekker, Hitler and Raeder shared the conviction that if the ships remained in Brest that they would eventually be disabled by British air raids.

Stephen Roskill, the British naval official historian, wrote in 1956 that the German verdict was accurate. Hitler had exchanged the threat to British Atlantic convoys for a defensive deployment near Norway against a threat that never materialised. Roskill wrote that the British had misjudged the time of day when the German ships would sail but this mistake was less influential than the circumstantial failures of Coastal Command reconnaissance to detect the ships which had been at sea for four of them after dawn had broken, before the alarm was raised. Churchill ordered a Board of Enquiry (under Sir Alfred Townsend Bucknill, Alfred Bucknill), which criticised Coastal Command for failing to ensure that a dawn reconnaissance was flown to compensate for the problems of the night patrols off Brest and from Ushant to the Isle de Bréhat. The inquiry also held that there should have been more suspicion of the German radar jamming on the morning of 12 February and that involving Bomber Command in an operation for which it was untrained was a mistake.

The board found that the delay in detecting the German ships led to the British attacks being made piecemeal, against formidable German defensive arrangements and that the few aircraft and ships that found the group were "cut to pieces". In 2012, Ken Ford wrote that the inquiry was, perforce, a whitewash, blaming instrument failures rather than incompetence but the report was still kept secret until 1946. In 1991, John Buckley (historian), John Buckley wrote that the ASV Hudsons had been forbidden to use flares off Brest, because of the presence of ''Sealion'' and that one of the technical faults to an ASV could have been repaired, had the operator carried out a fuze check properly. Joubert was criticised for complacency, in not sending replacement sorties, despite his earlier warning that the Brest Group was about to sail, because of the assumption in Operation Fuller since 6 April 1941, that a day sailing was certain,

The Dash exposed many failings in RAF planning, that only three torpedo-bomber squadrons with were in Britain, that training had been limited by the lack of torpedoes and the example of Japanese tactics had been ignored. The effectiveness of Bomber Command against moving ships was shown to be negligible and the failure to ensure unity of command before Operation Fuller began, led to piecemeal attacks using unsuitable tactics.

Reginald Victor Jones, R. V. Jones, Assistant Director of Intelligence (Science) at the Air Ministry during the war, wrote in his memoir, that for several days, army radar stations on the south coast had been jammed. Lieutenant-Colonel Wallace, a member of the army Radar Interception Unit, had reported this through the chain of command. On 11 February, Wallace had called for Jones to assist him in bringing attention to the German radar jamming. A gradual increase in the jamming had misled most operators to its intensity. Martini had unobtrusively made the British radar cover "almost useless". Jones quoted Francis Bacon,

and included an anecdote of the chain of command breaking down under the shock of the Brest Group sailing so far up the Channel undiscovered. Air marshals were said to have sat on each other's desks, thinking of pilots they could telephone to find the ships; even after the Brest Group had been found, contact was lost several times. In 1955, Jones met Captain Giessler, the Navigating Officer on ''Scharnhorst'', who said that the worst time in the operation was the thirty minutes that ''Scharnhorst'' was stationary, after hitting a mine just beyond Dover; in the low cloud none of the British aircraft found them. In the Official History of the Royal Canadian Air Force (1994) Brereton Greenhous et al. wrote that the Canadian 401 Tactical Fighter Squadron, 401 Squadron had been sent "to intervene in a battle between German E-boats and British MTBs"; 404 Squadron was ordered

and 411 Squadron had been ordered on an "E-boat search". "The 'Channel block' had failed ignominiously".

In the German semi-official history ''Germany in the Second World War'' (2001), Werner Rahn wrote that the operation was a tactical success but that this could not disguise the fact of a strategic withdrawal. Brest was a location from which the had anticipated much success, especially after the Japanese entry into the war had diverted Allied resources to the Pacific, creating new opportunities for offensive action in the Atlantic. Rahn also noted that some members of the German Naval War Staff took the view that German war potential had reached its limit and that

In 2018, Craig Symonds wrote of the futility of keeping heavy units in Brest,

''Scharnhorst'' later joined ''Tirpitz'' in Norwegian waters as a threat to Allied Arctic convoys of World War II supplying the USSR.

Casualties

British aircraft losses to the were two Bristol Blenheim, Blenheims, four Whirlwinds, four Vickers Wellington, Wellingtons, six Hurricanes, nine Handley Page Hampden, Hampdens and ten Spitfires. gunners shot down all six Swordfish and a Hampden bomber. ''Worcester'' lost killed, four died of wounds and of the complement of ship was out of action for In 2014, Steve Brew recorded 230–250 killed and wounded. The torpedo boats ''Jaguar'' and damaged by bombing, two sailors were killed and several men were badly wounded by bomb splinters and small-arms fire; the lost 17 aircraft and eleven pilots. In 1996, Donald Caldwell gave 23 aircrew killed, four being fighter pilots from JG 26 and that 22 aircraft were shot down, of which seven were fighters.

Subsequent operations

''Gneisenau'' entered a Dry dock#Floating, floating dry dock at Kiel and was hit twice by RAF bombers, on the night of One bomb hit the battleship on her forecastle and penetrated the armoured deck. The explosion ignited a fire in the foremost magazine, which detonated, throwing the forward turret off its mount. The damage prompted the German Naval Staff to rebuild ''Gneisenau'' to mount the six guns originally planned, rather than repair the ship and the damaged bow section was removed to attach a longer one. By early 1943, the ship had been sufficiently repaired to begin the conversion but after the failure of German surface forces at the Battle of the Barents Sea in December 1942, Hitler ordered the work to stop. On 23 February, ''Prinz Eugen'' was torpedoed by a British submarine off Norway and put out of action until October; then spent the rest of the war in the Baltic. On 28 March, the British raided St Nazaire in Operation Chariot and destroyed the ''Normandie'' dock, the only one in France capable of accommodating the largest German warships. ''Scharnhorst'' participated in Operation Zitronella against Spitzbergen on 8 September 1943 and was sunk at the Battle of the North Cape on 26 December.

Memorial and commemorations

A granite memorial to all Britons involved in Operation Fuller was erected in Marine Parade Gardens in Dover, to mark the 70th Anniversary Remembrance of the event in 2012. Sailors from provided a Guard of Honour as part of the parade held to mark the unveiling..

On 10 February 2017, at the Fleet Air Arm memorial church at RNAS Yeovilton (HMS Heron), RNAS Yeovilton (HMS ''Heron''), a ceremony and flypast by four AgustaWestland AW159 Wildcat, Wildcat HMA2 helicopters of the current 825 Naval Air Squadron was conducted, marking the 75th anniversary of Lieutenant-Commander Esmonde and 825 Naval Air Squadron's attack.

See also

* Operation Kita

Notes

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External links

Nafziger: ''Kriegsmarine'' Order of Battle

Nafziger: ''Luftflotte'' 3, Order of Battle, 12 February 1942



The Channel Dash Association

Channel Dash War Memorial, Dover (2012, Panoramio)


* [http://www.naval-history.net/xGM-Chrono-10DD-09VW-Worcester.htm Destroyer net, HMS Worcester]

Operations of 452 Sqn RAAF

{{World War II

Conflicts in 1942
Atlantic and Arctic theatres of World War II
Naval battles of World War II involving Germany
Naval battles of World War II involving the United Kingdom
Naval aviation operations and battles
February 1942 events
Germany–United Kingdom military relations
Military history of the English Channel