French submarine Sfax

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Sfax
Sfax′s sister ship Ajax in 1930.
History
France
NameSfax
NamesakeSfax, a city in Tunisia
OperatorFrench Navy
Ordered1930
BuilderAteliers et Chantiers de la Loire, Saint-Nazaire, France
Laid down28 July 1931
Launched6 December 1934
Commissioned7 September 1936
HomeportBrest, France
FateSunk 19 December 1940
General characteristics [1]
Class and typeRedoutable-class submarine
Displacement
  • 1,384
    standard
  • 1,570 long tons (1,595 t) normal
  • 2,084 long tons (2,117 t) submerged
Length
  • 92.30 m (302 ft 10 in) oa
  • 92.00 m (301 ft 10 in) pp
Beam8.20 m (26 ft 11 in)
Draught4.70 m (15 ft 5 in)
Propulsion
Speed
  • 20 knots (37 km/h; 23 mph) (surfaced)
  • 10 knots (19 km/h; 12 mph) (submerged)
Range
  • 10,000 nmi (19,000 km; 12,000 mi) at 10 kn (19 km/h; 12 mph)
  • 4,000 nmi (7,400 km; 4,600 mi) at 17 kn (31 km/h; 20 mph)
  • 100 nmi (190 km; 120 mi) at 5 kn (9 km/h; 6 mph) submerged
Complement61
Armament
  • 4 × fixed 550 mm (21.7 in)
    bow
    ,
  • 5 × 550 mm (21.7 in) and 2 × 400 mm (15.7 in) torpedo tubes on external mounts
  • 1 × 100 mm (3.9 in) gun
  • 1 × 13.2 mm machine gun

Sfax was a French Navy Redoutable-class submarine of the M6 series commissioned in 1936. She participated in World War II, first on the side of the Allies from 1939 to June 1940 and then in the navy of Vichy France until a German submarine mistook her for an Allied submarine and sank her in December 1940.

Characteristics

Profile of Casabianca, sister ship of Sfax.

Sfax was part of a fairly homogeneous series of 31 deep-sea patrol submarines also called "1,500-tonners" because of their displacement. All entered service between 1931 and 1939.

The Redoutable-class submarines were 92.3 metres (302 ft 10 in) long and 8.1 metres (26 ft 7 in) in

draft of 4.4 metres (14 ft 5 in). They could dive to a depth of 80 metres (262 ft). They displaced 1,572 tonnes (1,547 long tons) on the surface and 2,082 tonnes (2,049 long tons) underwater. Propelled on the surface by two diesel engines producing a combined 6,000 horsepower (4,474 kW), they had a maximum speed of 18.6 knots (34.4 km/h; 21.4 mph). When submerged, their two electric motors
produced a combined 2,250 horsepower (1,678 kW) and allowed them to reach 10 knots (19 km/h; 12 mph). Also called “deep-cruising submarines”, their range on the surface was 10,000 nautical miles (19,000 km; 12,000 mi) at 10 knots (19 km/h; 12 mph). Underwater, they could travel 100 nautical miles (190 km; 120 mi) at 5 knots (9.3 km/h; 5.8 mph).

Sfax,

Construction and commissioning

Laid down at Ateliers et Chantiers de la Loire in Saint-NazaireFrance, on 28 July 1931[3] with the hull number Q182, Sfax was launched on 6 December 1934.[3] She was commissioned on 7 September 1936.[3][4]

Service history

1936–1939

In 1937, all French submarines had their folding radio

masts removed and replaced by a hoisting periscopic antenna.[5] Sfax also became one of only three submarines — along with her sister ships Casabianca and Le Glorieux — to receive a radio direction finder.[5] On 31 July 1938, a member of Sfax′s crew died in a road accident.[6]

By the beginning of 1939, Sfax was assigned to the 2nd Submarine Division based at Brest, France.[7] Her sister ships Achille, Casabianca, and Pasteur made up the rest of the division.[8] She underwent a refit at Brest from February to April 1939,[7] then patrolled in the Atlantic Ocean until later in 1939, when the 2nd Submarine Division was transferred to Toulon, France, for operations in the Mediterranean Sea.[7]

World War II

French Navy

When

merchant fleet — which the Allies suspected of serving as supply ships for German U-boats — had taken refuge at the start of the war.[6][10] Sfax and the other submarines of her division, as well as their sister ships Agosta and Ouessant, spent several weeks patrolling off Vigo waiting in vain for German blockade runners until the patrols were discontinued at the end of October 1939.[5][7]

All four submarines of the 2nd Submarine Division subsequently were assigned to escort duty for Allied convoys in the Atlantic.[6][7][11] They departed Brest on 14 November 1939 and proceeded to Halifax, Nova Scotia, Canada.[5] Despite encountering bad weather during their voyage, they arrived at Halifax at 07:30 on 25 November 1939.[5] The British Royal Navy submarines HMS Cachalot, HMS Narwhal, HMS Porpoise, and HMS Seal joined them there for escort duty on 26 November 1939.[5] On 2 December 1939, Convoy HX 11 — consisting of 11 British tankers, 33 British cargo ships, and a French cargo ship — departed Halifax bound for the United Kingdom with an escort consisting of Sfax, Casabianca, the British Royal Navy battleship HMS Revenge, and a number of Royal Navy and Royal Canadian Navy destroyers,[3] Sfax and Casabianca joining the escort on 4 December 1939.[5] On 17 December 1939, Sfax and Casabianca parted company with the convoy, which arrived safely in British waters on 18 December 1940,[3] and the two French submarines arrived at Brest the same day.[5] The 2nd Submarine Division continued convoy escort duty through the winter of 1939–1940.[7][11]

During the spring of 1940, Sfax and the other submarines of her division supported Allied forces fighting in the

Ship-of-the-Line Lieutenant) L. V. Groix, later received a commendation for Sfax′s performance off Norway.[14]

German ground forces advanced into France on 10 May 1940, beginning the

with Italy
on 24 June, both of which went into effect on 25 June 1940.

Vichy France

After France's surrender, Sfax served in the naval forces of Vichy France, based at Casablanca.[7] In the aftermath of the British attack on Mers-el-Kébir — in which a Royal Navy squadron attacked the French naval squadron at the base at Mers El Kébir near Oran on the coast of Algeria on 3 July 1940 — Sfax, Casabianca, and their sister ship Poncelet maintained a constant patrol in the Atlantic Ocean 20 nautical miles (37 km; 23 mi) off Casablanca from 6 to 18 July 1940 to protect the incomplete battleship Jean Bart, which had fled to Casablanca before the armistice.[5][7][15] On 23 or 28 October 1940, according to different sources, Sfax joined Casabianca and their sister ships Bévéziers and Sidi Ferruch in forming a new 2nd Submarine Division based at Casablanca.[5][16]

At 12:00 on 17 December 1940, the 2,785-

munitions and 3,500 tons of fuel oil.[3][17][18] Ordered to transfer to Dakar to relieve the submarine Bévéziers there, Sfax belatedly received additional orders to escort Rhône on her voyage, and she also departed Casablanca that day.[7] Sfax caught up with Rhône at 16:00 on 17 December 1940, and the two vessels continued their voyage in company.[7]

Loss

Sfax′s and Rhône′s voyage southward along the African coast was uneventful until they reached a point between

diesel oil and two violent explosions.[21] Within 30 seconds, Sfax sank by the stern at an angle of 40 degrees[21] in 80 metres (262 ft)[5] of water in the Atlantic Ocean either 7 nautical miles (13 km; 8.1 mi) off Cape Juby at 28°03′N 012°54′W / 28.050°N 12.900°W / 28.050; -12.900 (Sfax),[3][17][18][21][22] 60 nautical miles (110 km; 69 mi) off Cape Juby,[5] or 80 nautical miles (150 km; 92 mi) northeast of Cape Juby at 28°30′N 011°40′W / 28.500°N 11.667°W / 28.500; -11.667 (Sfax),[3][18]
according to different sources.

With no reason to believe that the French vessels were under submarine attack, Rhône′s

rowboat.[24] It is unknown how Sfax′s four survivors were distributed among the boats.[25] The boats were overloaded, so Rhône's commanding officer and nine volunteers from her crew reboarded Rhône and an hour later, after darkness fell, managed to free and launch her motorboat, once again abandoning Rhône.[24]

At 20:00 on 19 December 1940, a Spanish fishing trawler found the motorboat, rescued Rhône's commanding officer and the nine volunteers from it, and took the motorboat in tow.[24] At 23:00, the trawler transferred the 10 survivors to the French cargo ship Fort Royal, which transmitted a signal reporting the events to the Vichy French naval command in Casablanca.[24] Although the signal failed to reach Casablanca, the French cargo ship Francois L-D received it and altered course to proceed to the scene of the attack.[24] Francois L-D took the 10 survivors aboard from Fort Royal and launched a motor whaleboat to conduct a fruitless search to the southeast for more survivors.[24] Francois L-D herself headed southwest, and at 07:45 on 20 December 1940 sighted one of Rhône′s whaleboats 10 nautical miles (19 km; 12 mi) from Rhône, rescuing six more men.[24] Rhône finally sank at 15:00 on 20 December 1940[24] at 28°03′N 012°54′W / 28.050°N 12.900°W / 28.050; -12.900 (Rhône).[17]

Francois L-D continued to search the area but found no more survivors, and she suspended her search at 18:30 on 20 December 1940 and headed for

Guelmin in French Morocco.[24]

Sixty-five of the 69 men aboard Sfax died in her sinking.[14][3][18] Eleven members of Rhône′s crew lost their lives.[17][14]

On 21 December 1940, U-37′s commanding officer,

Sahara Desert in Algeria.[18][26]

Commemoration

Groix received a posthumous promotion to capitaine de corvette (corvette captain) "on exceptional grounds and for feats of war."[14] A street in Brest, his home town, is named for him.[14]

References

Citations

  1. ^ Gardiner & Chesneau 1980, pp. 273–274.
  2. ^ Huan, p. 44.
  3. ^ a b c d e f g h i j k l m Allied Warships: FR Sfax, uboat.net Accessed 9 July 2022
  4. ^ Le Conte.
  5. ^ a b c d e f g h i j k l m n o p q r s u-boote.fr SFAX (in French) Accessed 14 August 2022
  6. ^ a b c d e f Sous-Marins Français Disparus & Accidents: Sous-Marin Sfax (in French) Accessed 14 August 2022
  7. ^ a b c d e f g h i j k l m n o Morgan & Taylor, p. 78.
  8. ^ Huan, p. 49.
  9. ^ u-boote.fr PASTEUR (in French) Accessed 4 September 2022
  10. ^ a b Huan, pp. 60–61.
  11. ^ a b Huan, p. 67.
  12. ^ ACHILLE (in French) Accessed 5 August 2022
  13. ^ Picard, p. 51.
  14. ^ a b c d e f Morgan & Taylor, p. 81.
  15. ^ Huan, pp. 88–89.
  16. ^ Huan, p. 96.
  17. ^ a b c d e Ships hit by U-boats: Rhône, French Fleet oiler, uboat.net Accessed 9 July 2022
  18. ^ a b c d e f g Ships hit by U-boats: Sfax (Q 182) French Submarine, uboat.net Accessed 9 July 2022
  19. ^ Morgan & Taylor, pp. 78–79.
  20. ^ Huan, p. 98.
  21. ^ a b c d e Morgan & Taylor, p. 79.
  22. ^ Huan, p. 98.
  23. ^ Morgan & Taylor, pp. 79–80.
  24. ^ a b c d e f g h i j k l m n o p q r Morgan & Taylor, p. 80.
  25. ^ Morgan & Taylor, pp. 80–81.
  26. ^ Morgan & Taylor, pp. 79, 80.

Bibliography