German submarine U-230
Encyclopedia
U-230 was a Type VIIC U-boat
built for the German
Kriegsmarine
for service during World War II
.
She was commissioned on 24 October 1942 with Oberleutnant Siegmann in command. She carried out three patrols, before moving to the Mediterranean where she was bombed and sunk when the Allies landed near Toulon
, France.
, an early form of airborne radar detector; it replaced a piece of equipment known colloquially as the 'Biscay Cross', (after its first use in the bay of that name). This contraption had a disconcerting habit of breaking with monotonous regularity.
to Bergen
in Norway, where she loaded enough provisions, fuel and ammunition for a trip to "the United States and back to France". The boat then steamed northwest, heading for the gap between the Shetland
and Färoe Islands. The Metox detected an aircraft which unsuccessfully dropped four explosive devices on the crash-diving U-boat. It was only when the boat had reached a depth of 125 m (410.1 ft) that her headlong plunge was checked. More contact with aircraft was susequently encountered, but their attacks were inconclusive.
U-230s patrol area was 600 mi (965.6 km) east of Newfoundland; it was reached despite the February storms. The weather was so bad that personnel on watch on the bridge were forced to wear rubber diving suits and eye masks. They had to be secured to the wildly pitching and yawing U-boat by steel belts. Below, it was no better, with bodies being hurled in all directions.
The discomfort was forgotten when another U-boat in the 'wolf-pack' reported the presence of a convoy. U-230 pursued the group of ships, preparing her equipment and weapons as she went. The sound of an explosion and the sight of flames caused a correction of course after a two day chase. Once the right position was adopted, four torpedoes were fired. Three hits were recorded. The torpedo tubes then had to be re-loaded, no easy task in the mountainous seas. By the time this was accomplished, there was no sign of the convoy. U-230 then dived, to the relatively comfortable depth of 140 m (459.3 ft). The boat continued to follow the convoy, re-establishing contact rather dramatically by surfacing in its midst. The ships closest to the submarine all appeared to be damaged in some way; torpedoes were not necessary for their destruction, to fire them would have been pointless. U-230 dived once more.
, (U-boat headquarters), in an area of some 80000 square mile of the North Atlantic. The U-boats were hoping to intercept a convoy, SC122, outwardbound from Halifax
, in Nova Scotia
. The convoy was spotted by one of the group; all U-boats were ordered to converge on it. U-230 closed the convoy, with one of her lookouts exclaiming:"Shadows on [sic] port, distance 6,500. Its the whole herd!" There then followed some frenzied jockeying for position. The U-boatmen were constantly reminded of their wake, which was conspicuous in the moonlight. The submarine fired five 'eels', scoring three hits.
in France. It was not all over yet however, as U-230 found. The Bay of Biscay
was a hazardous area for U-boats, having to constantly crash-dive because of marauding British aircraft. Siegmann decided that it would be safer to travel on the surface at night, diving during daylight. At one point, the U-boat found herself in the middle of a fleet of French fishing boats. Having met up with her escort, U-230 sailed into Brest harbour in late March 1943, to be greeted by well-wishers, a band, senior officers, girls with flowers and an overhaul.
On 12 May, a convoy (reported by the captain to consist of 100 ships) was sighted; the boat worked its way into an attack position. As U-230 was about to commence her underwater assault, the convoy changed course. Sailing away at 11 knots, U-230 could not catch it while beneath the surface. It was a classic demonstration of the Type VII U-boat's inferior submerged speed which was no better than just over seven knots. She could only risk surfacing to move to a new attack position. The boat had barely started to do this when she was unsuccessfully attacked by "a twin-engined plane". It was decided that since the nearest land was too far away to be in range, the machine could only have come from an aircraft carrier. The whole process was repeated a few hours later with a similar result. Many more times U-230 was attacked and many more times the boat's luck held. On one occasion a single-engined plane came too close to the boat and was shot down. The pilot was killed. Throughout this period U-230 had intercepted a steady stream of signals from other boats being attacked and sunk by aircraft. By the end of the patrol a total of eleven submarines had been lost.
A sense of déjà vu enveloped the boat when a convoy was spotted, chased, and lost as it sailed away from them. The eerie feeling was maintained when an aircraft dropped several bombs on the diving U-boat, including a smoke bomb (to indicate the U-boat's position to the follow-up forces). Siegmann decided that discretion was the better part of valour and ordered the boat to leave the area quickly on the surface. More air attacks followed, but U-230 continued to defy the odds. The boat dived to 300 m (984.3 ft), a total of 300 depth charges vainly seeking her out. Once again, U-230 had escaped, suffering a lot of damage, including a ruptured fuel tank which had caused a line of rainbow colours to spread on the surface. This trail had led the British to assume that their enemy was mortally wounded and that their presence was no longer required.
To make up for the loss of fuel, U-230 was ordered to rendezvous with U-634 for a transfer of diesel oil. Almost two nervous hours were needed before the operation was comlete. Although she now had enough fuel to reach Brest, enemy aircraft had other ideas. Over the next few days, U-230 endured a steady stream of air and depth charge attacks. While dealing with one of these, a fire broke out in the control room. It was fought by several men with extinguishers. On another occasion the boat suffered a surprise attack by a B 24 Liberator fitted with a Leigh Light
. This led Siegmann to the conclusion that the British had a whole range of new and effective weapons.
, opposite the US Navy Base at Norfolk
on the eastern coast of the United States. She also took a new crew member, a doctor, whose sea-going experience was nil. The boat departed without ceremony on 5 July. She was due to meet-up with U-506
and U-533 from Lorient
. The idea was that the three boats would combine their anti-aircraft firepower while crossing the Bay of Biscay. That theory was severely tested when the small fleet was attacked by three Liberators and a Sunderland
flying boat. In the ensuing battle, the Sunderland was shot down, but not before a gunner on U-230 was wounded. The encounter ended when all three U-boats dived.
She was soon back in the "old routine - diving three or four times daily before aircraft." On 30 July, the boat's signals officer received three distress calls, all in the Bay of Biscay, from the same spot. U-230 could do nothing for the "milch cows", (U-tankers); indeed, their loss jeopardized the boat's chances of refuelling at sea. On 3 August the submarine received the disturbing news that its Metox, far from giving a warning of enemy radar, was acting as a homing beacon. The device was hurriedly switched off.
on 13 August. By now, her fuel state was critical; just two tons of diesel oil remained in her tanks. She received instructions to meet another U-boat, U-117
. She had exhausted all her fuel and was drifting, a sitting duck, but she met U-634, who was also there for replenishment. U-117 never arrived. Discussions between Siegmann and Dahlhaus (U-634s captain), resulted in U-634 moving 150 mi (241.4 km), to the west and informing Headquarters of the situation. BdU's response was to direct that U-634 must share her remaining fuel with U-230 which would be sufficient to reach a new rendezvous with another supply boat: U-847. A total of five U-boats reached the mid-Atlantic refueling point. U-230s Executive Officer, Herbert Werner, could not believe the casual attitude (to air attack) being displayed by U-847:
His opposite number (Commander Herbert Kuppisch) replied:
U-847 was sunk by aircraft just hours later. All hands lost.
The relentless hunt by anti-submarine forces and air elements continued; indeed, it seemed to increase in intensity as the boat neared its home base. U-230 evaded everything thrown at her and when the rocks of Brittany were sighted on 8 September, she had been at sea almost ten weeks. After the boat had tied up, Frederich, the Chief, presented Siegmann with a cup of fuel, claiming that was all that he could extract from the tanks. Siegmann replied: "...that is how efficiently I operate. I always provide a margin of safety."
It was decided to attack on the surface at night, but that was not so easy as the convoy seemed to have escaped. It was only after sniffing the air for funnel smoke that the first shapes were detected. Four torpedoes were fired, one hit its target. As the night descended into chaos, a homing torpedo was also fired, U-230 dived to avoid it and the wrath of the escorts. Surfacing later to reload her torpedo tubes, the boat came across a corvette
alongside a sinking ship, taking off survivors. Siegmann decided not to worsen the situaton and turned his submarine away from the rescue scene. A pursuing destroyer
, fitted with an infra-red searchlight, showed no such compunction, bearing down on the U-boat which departed the area with some alacrity. The submersible lost the escort in rising seas, but she had not given up attacking the convoy. Two hours before dawn, contact was renewed and one hit was scored. A combination of tenacious defence and the on-coming daylight ensured that the boat would have to dive to evade the air threat.
The pattern of chase, attack by aircraft, and dive was repeated every time U-230 tried to re-establish contact with the convoy. Then, on the evening of 26 October, the boat found herself surfaced inside the convoy's security cordon. All five torpedo-tubes were rapidly emptied, (including a 180° turn so that the single stern tube could be used). Two, or possibly three hits were registered. The detonations caused three pursuing escort ships to break off their chase. U-230, all her torpedoes expended, headed for home. The Bay of Biscay gauntlet was run once more, the aerial assault continuing into port. The boat was only relatively safe when she moved into the massive reinforced concrete pens specially constructed to house submarines.
, where the British were determined to challenge any enemy passage. Full advantage was taken of the strong current in the narrows. At one stage it was realised that U-230 was not the only conveyance enjoying the current. The boat's hydrophones picked up the sound of dolphins playing and "talking to each other". The sound of detonating depth charges soon drove them back into the Atlantic.
By the afternoon of 7 December it was possible to see the North African and European coasts with one sweep of the periscope; U-230 was now in the Mediterannean. She was instructed to make for Toulon. A potential suicide mission had been relatively uneventful.
She was based in the French city until August 1944 when she was one of eight boats bombed and sunk, causing U-boat operations in the Mediterannean to cease.
U-boat
U-boat is the anglicized version of the German word U-Boot , itself an abbreviation of Unterseeboot , and refers to military submarines operated by Germany, particularly in World War I and World War II...
built for the German
Nazi Germany
Nazi Germany , also known as the Third Reich , but officially called German Reich from 1933 to 1943 and Greater German Reich from 26 June 1943 onward, is the name commonly used to refer to the state of Germany from 1933 to 1945, when it was a totalitarian dictatorship ruled by...
Kriegsmarine
Kriegsmarine
The Kriegsmarine was the name of the German Navy during the Nazi regime . It superseded the Kaiserliche Marine of World War I and the post-war Reichsmarine. The Kriegsmarine was one of three official branches of the Wehrmacht, the unified armed forces of Nazi Germany.The Kriegsmarine grew rapidly...
for service during World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
.
She was commissioned on 24 October 1942 with Oberleutnant Siegmann in command. She carried out three patrols, before moving to the Mediterranean where she was bombed and sunk when the Allies landed near Toulon
Toulon
Toulon is a town in southern France and a large military harbor on the Mediterranean coast, with a major French naval base. Located in the Provence-Alpes-Côte-d'Azur region, Toulon is the capital of the Var department in the former province of Provence....
, France.
Fitting-out
U-230 was a U-boat that was equipped with a primitive type of radar; so primitive that the sensor, fixed forward of the conning tower, obliged the boat to circle the horizon searching for potential targets. She was later fitted with MetoxMetox
The Metox, named after its manufacturer, was a pioneering high frequency very sensitive radar warning receiver manufactured by a small French company in occupied Paris, which could detect ASV transmissions from patrolling Allied aircraft. It is not clear whether the design was German or French or...
, an early form of airborne radar detector; it replaced a piece of equipment known colloquially as the 'Biscay Cross', (after its first use in the bay of that name). This contraption had a disconcerting habit of breaking with monotonous regularity.
First patrol
U-230s initial sortie began in January 1943 with a snow-storm. She made her way from KielKiel
Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 238,049 .Kiel is approximately north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula, and the southwestern shore of the...
to Bergen
Bergen
Bergen is the second largest city in Norway with a population of as of , . Bergen is the administrative centre of Hordaland county. Greater Bergen or Bergen Metropolitan Area as defined by Statistics Norway, has a population of as of , ....
in Norway, where she loaded enough provisions, fuel and ammunition for a trip to "the United States and back to France". The boat then steamed northwest, heading for the gap between the Shetland
Shetland Islands
Shetland is a subarctic archipelago of Scotland that lies north and east of mainland Great Britain. The islands lie some to the northeast of Orkney and southeast of the Faroe Islands and form part of the division between the Atlantic Ocean to the west and the North Sea to the east. The total...
and Färoe Islands. The Metox detected an aircraft which unsuccessfully dropped four explosive devices on the crash-diving U-boat. It was only when the boat had reached a depth of 125 m (410.1 ft) that her headlong plunge was checked. More contact with aircraft was susequently encountered, but their attacks were inconclusive.
U-230s patrol area was 600 mi (965.6 km) east of Newfoundland; it was reached despite the February storms. The weather was so bad that personnel on watch on the bridge were forced to wear rubber diving suits and eye masks. They had to be secured to the wildly pitching and yawing U-boat by steel belts. Below, it was no better, with bodies being hurled in all directions.
The discomfort was forgotten when another U-boat in the 'wolf-pack' reported the presence of a convoy. U-230 pursued the group of ships, preparing her equipment and weapons as she went. The sound of an explosion and the sight of flames caused a correction of course after a two day chase. Once the right position was adopted, four torpedoes were fired. Three hits were recorded. The torpedo tubes then had to be re-loaded, no easy task in the mountainous seas. By the time this was accomplished, there was no sign of the convoy. U-230 then dived, to the relatively comfortable depth of 140 m (459.3 ft). The boat continued to follow the convoy, re-establishing contact rather dramatically by surfacing in its midst. The ships closest to the submarine all appeared to be damaged in some way; torpedoes were not necessary for their destruction, to fire them would have been pointless. U-230 dived once more.
SC 121
On 8 March, U-230 began hunting for another convoy, SC 121, comprising 65 ships. Finding it, the submarine almost collided with a freighter. A torpedo was launched at it from just 400 m (437.4 yd) away. The resulting explosion split the ship in two. U-230 fired two more torpedoes before coming under attack from ships of the escort and narrowly escaping serious damage from a disintegrating 10,000-ton cargo ship. It was later deduced that this vessel (an ammunition ship), had been attacked by another U-boat. U-230 tried to dive, but surface tension held the boat while escort ships bore down on the hapless submarine. After a wild rush by crew members to the forward torpedo room, the boat reached a depth of nearly 200 m (656.2 ft) before suffering sustained depth charge attacks. Eventually, the escorts withdrew; U-230 surfaced rather cautiously, ventilated the boat, charged her batteries and continued after the convoy.SC 122
U-230, as part of a 40-boat pack, took up a new position under the direction of BdUBDU
The abbreviation BDU may refer to:*Battle Dress Uniform, United States' combat uniforms.*Befehlshaber der U-Boote , commander-in-chief of Germany's submarine fleets in WW-II.*FAA location identifier for Boulder Municipal Airport...
, (U-boat headquarters), in an area of some 80000 square mile of the North Atlantic. The U-boats were hoping to intercept a convoy, SC122, outwardbound from Halifax
City of Halifax
Halifax is a city in Canada, which was the capital of the province of Nova Scotia and shire town of Halifax County. It was the largest city in Atlantic Canada until it was amalgamated into Halifax Regional Municipality in 1996...
, in Nova Scotia
Nova Scotia
Nova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...
. The convoy was spotted by one of the group; all U-boats were ordered to converge on it. U-230 closed the convoy, with one of her lookouts exclaiming:"Shadows on [sic] port, distance 6,500. Its the whole herd!" There then followed some frenzied jockeying for position. The U-boatmen were constantly reminded of their wake, which was conspicuous in the moonlight. The submarine fired five 'eels', scoring three hits.
Retun to base
The boat withdrew, signalling BdU that she had sunk a total of seven ships and damaged two more. Having expended all of her torpedoes, U-230 set sail for BrestBrest, France
Brest is a city in the Finistère department in Brittany in northwestern France. Located in a sheltered position not far from the western tip of the Breton peninsula, and the western extremity of metropolitan France, Brest is an important harbour and the second French military port after Toulon...
in France. It was not all over yet however, as U-230 found. The Bay of Biscay
Bay of Biscay
The Bay of Biscay is a gulf of the northeast Atlantic Ocean located south of the Celtic Sea. It lies along the western coast of France from Brest south to the Spanish border, and the northern coast of Spain west to Cape Ortegal, and is named in English after the province of Biscay, in the Spanish...
was a hazardous area for U-boats, having to constantly crash-dive because of marauding British aircraft. Siegmann decided that it would be safer to travel on the surface at night, diving during daylight. At one point, the U-boat found herself in the middle of a fleet of French fishing boats. Having met up with her escort, U-230 sailed into Brest harbour in late March 1943, to be greeted by well-wishers, a band, senior officers, girls with flowers and an overhaul.
Second patrol
U-230 set out for her second patrol on 24 April 1943. She was initially accompanied by U-456. After safely negoiating the Bay of Biscay, the boat was instructed to head for an area in the mid-Atlantic where an east-bound convoy was expected. On 2 May, in much better weather than that of the first patrol, a ship was sighted which was seen to be from neutral Sweden and allowed to pass unmolested.On 12 May, a convoy (reported by the captain to consist of 100 ships) was sighted; the boat worked its way into an attack position. As U-230 was about to commence her underwater assault, the convoy changed course. Sailing away at 11 knots, U-230 could not catch it while beneath the surface. It was a classic demonstration of the Type VII U-boat's inferior submerged speed which was no better than just over seven knots. She could only risk surfacing to move to a new attack position. The boat had barely started to do this when she was unsuccessfully attacked by "a twin-engined plane". It was decided that since the nearest land was too far away to be in range, the machine could only have come from an aircraft carrier. The whole process was repeated a few hours later with a similar result. Many more times U-230 was attacked and many more times the boat's luck held. On one occasion a single-engined plane came too close to the boat and was shot down. The pilot was killed. Throughout this period U-230 had intercepted a steady stream of signals from other boats being attacked and sunk by aircraft. By the end of the patrol a total of eleven submarines had been lost.
Battle for survival
U-230 continued to harry the convoy and was heavily depth-charged (more than 200) in return. At one point the crew thought they had evaded the 'hunter' group, but it was merely allowing the 'killer' group of escort ships to replace it. Potash cartridges were distributed amongst the submarine's crew to help breathing.U-230 reached a depth of 280 m (918.6 ft), far below the test depth. Eventually, once "the Tommies had given up the hunt" and U-230 surfaced after 35 hours underwater.A sense of déjà vu enveloped the boat when a convoy was spotted, chased, and lost as it sailed away from them. The eerie feeling was maintained when an aircraft dropped several bombs on the diving U-boat, including a smoke bomb (to indicate the U-boat's position to the follow-up forces). Siegmann decided that discretion was the better part of valour and ordered the boat to leave the area quickly on the surface. More air attacks followed, but U-230 continued to defy the odds. The boat dived to 300 m (984.3 ft), a total of 300 depth charges vainly seeking her out. Once again, U-230 had escaped, suffering a lot of damage, including a ruptured fuel tank which had caused a line of rainbow colours to spread on the surface. This trail had led the British to assume that their enemy was mortally wounded and that their presence was no longer required.
To make up for the loss of fuel, U-230 was ordered to rendezvous with U-634 for a transfer of diesel oil. Almost two nervous hours were needed before the operation was comlete. Although she now had enough fuel to reach Brest, enemy aircraft had other ideas. Over the next few days, U-230 endured a steady stream of air and depth charge attacks. While dealing with one of these, a fire broke out in the control room. It was fought by several men with extinguishers. On another occasion the boat suffered a surprise attack by a B 24 Liberator fitted with a Leigh Light
Leigh light
The Leigh Light was a British World War II era anti-submarine device used in the Second Battle of the Atlantic.It was a powerful carbon arc searchlight of 24 inches diameter fitted to a number of the British Royal Air Force's Coastal Command patrol bombers to help them spot surfaced...
. This led Siegmann to the conclusion that the British had a whole range of new and effective weapons.
Return
U-230 reached Brest on 28 May, 1943. The band was missing, but the girls with flowers were there. The boat would have to go into dry dock where she remained until the end of June.Chesapeake Bay
U-230 took 24 mines for laying in Chesapeake BayChesapeake Bay
The Chesapeake Bay is the largest estuary in the United States. It lies off the Atlantic Ocean, surrounded by Maryland and Virginia. The Chesapeake Bay's drainage basin covers in the District of Columbia and parts of six states: New York, Pennsylvania, Delaware, Maryland, Virginia, and West...
, opposite the US Navy Base at Norfolk
Norfolk, Virginia
Norfolk is an independent city in the Commonwealth of Virginia in the United States. With a population of 242,803 as of the 2010 Census, it is Virginia's second-largest city behind neighboring Virginia Beach....
on the eastern coast of the United States. She also took a new crew member, a doctor, whose sea-going experience was nil. The boat departed without ceremony on 5 July. She was due to meet-up with U-506
German submarine U-506
German submarine U-506 was a Type IXC U-boat of the German Kriegsmarine during World War II. The submarine was laid down on 11 July 1940 at the Deutsche Werft yard at Hamburg, launched on 20 June 1941, and commissioned on 15 September 1941 under the command of Kapitänleutnant Erich Würdemann...
and U-533 from Lorient
Lorient
Lorient, or L'Orient, is a commune and a seaport in the Morbihan department in Brittany in north-western France.-History:At the beginning of the 17th century, merchants who were trading with India had established warehouses in Port-Louis...
. The idea was that the three boats would combine their anti-aircraft firepower while crossing the Bay of Biscay. That theory was severely tested when the small fleet was attacked by three Liberators and a Sunderland
Short Sunderland
The Short S.25 Sunderland was a British flying boat patrol bomber developed for the Royal Air Force by Short Brothers. It took its service name from the town and port of Sunderland in northeast England....
flying boat. In the ensuing battle, the Sunderland was shot down, but not before a gunner on U-230 was wounded. The encounter ended when all three U-boats dived.
Laying the mines
The wounded gunner was treated by the doctor, who, duty complete, retreated to his berth from which he hardly moved for the rest of the patrol, a victim of extreme seasickness. U-230 arrived in Chesapeake Bay on 27 July, several crew members caught sight of the illuminated American coast, but due to the frequency of shipping, she was not able to lay her mines until some hours later, on the 28th. With her task completed in short order, the boat withdrew.She was soon back in the "old routine - diving three or four times daily before aircraft." On 30 July, the boat's signals officer received three distress calls, all in the Bay of Biscay, from the same spot. U-230 could do nothing for the "milch cows", (U-tankers); indeed, their loss jeopardized the boat's chances of refuelling at sea. On 3 August the submarine received the disturbing news that its Metox, far from giving a warning of enemy radar, was acting as a homing beacon. The device was hurriedly switched off.
The fuel situation
Having steamed toward a number of unkept refueling rendezvous, U-230 found herself 300 mi (482.8 km) east of BarbadosBarbados
Barbados is an island country in the Lesser Antilles. It is in length and as much as in width, amounting to . It is situated in the western area of the North Atlantic and 100 kilometres east of the Windward Islands and the Caribbean Sea; therein, it is about east of the islands of Saint...
on 13 August. By now, her fuel state was critical; just two tons of diesel oil remained in her tanks. She received instructions to meet another U-boat, U-117
German submarine U-117
U-117 may refer to one of the following German submarines:* SM U-117, a Type UE 2 submarine launched in 1917 that served in the First World War and was surrendered in 1918...
. She had exhausted all her fuel and was drifting, a sitting duck, but she met U-634, who was also there for replenishment. U-117 never arrived. Discussions between Siegmann and Dahlhaus (U-634s captain), resulted in U-634 moving 150 mi (241.4 km), to the west and informing Headquarters of the situation. BdU's response was to direct that U-634 must share her remaining fuel with U-230 which would be sufficient to reach a new rendezvous with another supply boat: U-847. A total of five U-boats reached the mid-Atlantic refueling point. U-230s Executive Officer, Herbert Werner, could not believe the casual attitude (to air attack) being displayed by U-847:
"What's the matter with you people, don't you have any respect for aircraft?"
His opposite number (Commander Herbert Kuppisch) replied:
"We haven't seen any since we passed GreenlandGreenlandGreenland is an autonomous country within the Kingdom of Denmark, located between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago. Though physiographically a part of the continent of North America, Greenland has been politically and culturally associated with Europe for...
."
U-847 was sunk by aircraft just hours later. All hands lost.
The relentless hunt by anti-submarine forces and air elements continued; indeed, it seemed to increase in intensity as the boat neared its home base. U-230 evaded everything thrown at her and when the rocks of Brittany were sighted on 8 September, she had been at sea almost ten weeks. After the boat had tied up, Frederich, the Chief, presented Siegmann with a cup of fuel, claiming that was all that he could extract from the tanks. Siegmann replied: "...that is how efficiently I operate. I always provide a margin of safety."
Re-fit
U230s re-fit included the installation of anti-aircraft guns and the Bug, a new type of radar detector that replaced the obsolete Metox. New torpdoes had also been developed.Third patrol
U-230s third patrol began on 4 October 1943. As always the highly dangerous Bay of Biscay had to be crossed. It was decided that a series of decoys would be released in an effort at confusing British radar; they proved to be more of a hinderance than a help. At one stage two of these devices became entangled on the bridge, providing an ample radar-return just when it was not wanted. For a second time a French fishing fleet provided temporary cover. A constant series of aircraft were detected by the 'Bug', forcing the boat to dive frequently. Having broken into the North Atlantic, the boat was instructed to attack a convoy southeast of Greenland.It was decided to attack on the surface at night, but that was not so easy as the convoy seemed to have escaped. It was only after sniffing the air for funnel smoke that the first shapes were detected. Four torpedoes were fired, one hit its target. As the night descended into chaos, a homing torpedo was also fired, U-230 dived to avoid it and the wrath of the escorts. Surfacing later to reload her torpedo tubes, the boat came across a corvette
Corvette
A corvette is a small, maneuverable, lightly armed warship, originally smaller than a frigate and larger than a coastal patrol craft or fast attack craft , although many recent designs resemble frigates in size and role...
alongside a sinking ship, taking off survivors. Siegmann decided not to worsen the situaton and turned his submarine away from the rescue scene. A pursuing destroyer
Destroyer
In naval terminology, a destroyer is a fast and maneuverable yet long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller, powerful, short-range attackers. Destroyers, originally called torpedo-boat destroyers in 1892, evolved from...
, fitted with an infra-red searchlight, showed no such compunction, bearing down on the U-boat which departed the area with some alacrity. The submersible lost the escort in rising seas, but she had not given up attacking the convoy. Two hours before dawn, contact was renewed and one hit was scored. A combination of tenacious defence and the on-coming daylight ensured that the boat would have to dive to evade the air threat.
The pattern of chase, attack by aircraft, and dive was repeated every time U-230 tried to re-establish contact with the convoy. Then, on the evening of 26 October, the boat found herself surfaced inside the convoy's security cordon. All five torpedo-tubes were rapidly emptied, (including a 180° turn so that the single stern tube could be used). Two, or possibly three hits were registered. The detonations caused three pursuing escort ships to break off their chase. U-230, all her torpedoes expended, headed for home. The Bay of Biscay gauntlet was run once more, the aerial assault continuing into port. The boat was only relatively safe when she moved into the massive reinforced concrete pens specially constructed to house submarines.
The Mediterannean
U-230s captain received orders to break into the Mediterannean; when he passed the information on to the officers, the news was greeted with stoicism. During the evenng of 26 November, the boat departed Brest once more, only to turn due south almost immediately. The tension increased from 6 December when the boat approached the Strait of GibraltarStrait of Gibraltar
The Strait of Gibraltar is a narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates Spain in Europe from Morocco in Africa. The name comes from Gibraltar, which in turn originates from the Arabic Jebel Tariq , albeit the Arab name for the Strait is Bab el-Zakat or...
, where the British were determined to challenge any enemy passage. Full advantage was taken of the strong current in the narrows. At one stage it was realised that U-230 was not the only conveyance enjoying the current. The boat's hydrophones picked up the sound of dolphins playing and "talking to each other". The sound of detonating depth charges soon drove them back into the Atlantic.
By the afternoon of 7 December it was possible to see the North African and European coasts with one sweep of the periscope; U-230 was now in the Mediterannean. She was instructed to make for Toulon. A potential suicide mission had been relatively uneventful.
She was based in the French city until August 1944 when she was one of eight boats bombed and sunk, causing U-boat operations in the Mediterannean to cease.