The Souffleur was sunk by the British submarine HMS Parthian (N 75) on 25 June 1941 at position 33 ° 49 'North, 35 ° 26' East in front of Beirut, as the Souffleur appeared to recharge the batteries. Four torpedoes HMS Parthian shot down, one of them tore the U-boat in two parts. Four crew members who were on the bridge, were able to save by swimming, 50 sailors found their death.

The wreck lies in Khaldé, about 10 km from Beirut. Among the 54 crew members, 4 were able to be saved.

Info (Wikipedia):

The Souffleur was a U-boat of the Requin-Class (reguin = French, shark). A total of 9 boats were built. The Souffleur was a deep-submarine of the French Navy.
During the Second World War, the boats were used by the vichy-french as well as by the free-french Marines. Five submarines of the class came in the course of the K.

The hull was a two-hulled boat designed for diving on the depth of up to 80 meters. The drive was like in conventional submarines, a usual combination of two diesel engines for the water ride and two battery-operated electric motors for the dive trip. The diesel engines were from Sulzer or Schneider. The boats were seen as cumbersome and slow.

The weapons consisted of a 100 mm ceiling guns, two 8 mm MG on air defense and ten torpedo tubes in the 550 mm calibre. The boats had four torpedo-tubes in the bow and two in the stern. In addition, there were four, outside of the pressure swiveling body arranged pipes. The concept of arranged externally, but hinged at sea nachladbaren pipes, was, among French submarines, usual on that time. This design was considered complicated and disruptible. In addition, the undermined pipes affected control and trim and led, by the increased flow, resistance to slow and noise. Despite  the unreliability of the control technology  of french torpedoes on that time, it could not be waived on swivel pipes.

The boats were modernized from 1935 to 1937. Parts of the hull and propulsion system were maily rebuilt.

On the time between the beginning of the Second World War on 1st of September 1939 and the German-French ceasefire on the 22nd of June 1940, the submarines were mainly in the Mediterranean, and patrolled off the French and North African coast.

In June 1941 the British, together with frei-french forces occupied Syria and Lebanon, until  they stood under the control of the Vichy-France. During the fighting, the Souffleur was sunk by a British submarine.

Technical details:

Crew (54 men)
Displacement (of water: 1,150 ts under water: 1,441 ts)
Length (78.2 m)
Width (6.8 m)
Draught (5.1 m)
Drive (diesel: 2,900 hp (2,160 KW); Electric: 1,800 hp (1,340 KW)
Speed (up: 15 knots (28 mph); dipped: 9 knots (17 kph)
Fuel storage (115 ts)
Driving range (up to 9 knots: 7,700 NM (14,260 km); dipped to 5 knots: 70 NM (130 km)
Depth (80 m)

About the Diving:

The French submarine Souffleur is before the entry port of Beirut and is only accessible by boat. Visibility volatile.

The Souffleur is rarely visited and is in good condition.

The boat is broken into two parts, one can see many details.
The front part is on the side, torpedoes evident, one of the torpedoes is in the launch tube. Also visible: the air gun + rotary tower.
On the back: Rowing very well preserved.