SM UC 25

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SM UC 25
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German EmpireGerman Empire (Reichskriegsflagge)
Construction data
Submarine type: UC II boat
war mission C
Series: UC 25 - UC 33
Builder: Vulkanwerft (Hamburg)
Construction contract: August 29, 1915
Launch: June 10, 1916
Commissioning: June 28, 1916
Technical specifications
Displacement: 400 t (above water)
480 t (under water)
Length: 49.45 m
Width: 5.25 m
Draft: 3.7 m
Pressure body ø: 4.0 m
Max. Diving depth: 50 m
Dive time: 30 - 33 s
Drive: 2 × 250 HP diesel engines
2 × 230 HP electric motors
Speed: 11.6 knots (above water)
7.0 knots (under water)
Armament: 2 × 50 cm bow torpedo tube
1 × 50 cm stern
torpedo tube (7 torpedoes)
1 × 8.8 cm deck gun
18 mines
Mission data
Commanders:
Crew (target strength): 3 officers
23 crew
Calls: 13 activities
Successes: 13 ships with 10,471 GRT
2 warships with 1,970 t
Whereabouts: in the October 29, 1918 Pola scuttled

SM UC 25 was a seaworthy submarine of the German Imperial Navy during the First World War . It was stationed in the Baltic Sea and in the Mediterranean port of Pola .

Commitment and history

Until the spring of 1917, UC 25 belonged to the 5th submarine flotilla, the later U-Flotilla Kurland and was stationed in the Baltic Sea. Then it was the in the Mediterranean operating U-Flotilla Pola in Pola assumed.

Commandant Feldkirchner

April 1917 was the most successful month for the German submarines. Kapitänleutnant Feldkirchner sank three ships with 1,331 GRT on an undertaking that ran from March 21 to April 15, which led the boat from German waters to the Mediterranean . On May 15 of the same year, the boat sank the French destroyer Boutefeu here in connection with the naval battle in the Strait of Otranto, and the British sloop Aster on July 4 . Commandant Feldkirchner led UC 25 on a total of ten operations.

Commander Dönitz

The Cyclops, a British workshop ship

On March 1, 1918, Oberleutnant zur See Karl Dönitz took command of UC 25 . Less than two weeks later he set out on his first patrol in this boat. The aim of this enterprise was to attack a workshop ship that was lying in a Sicilian port. First Lieutenant Dönitz decided to penetrate the port of Augusta . There, UC 25 sank a ship he had identified as the Cyclops . According to the Dönitz biography from 1984, it was an Italian coal steamer. UC 25 returned to Pola on April 11th. For the next venture, UC 25 ran out on July 17th. This trip, the last under Dönitz's command, lasted until August 7, 1918.

Whereabouts

In the last days of October 1918, the ready-to-go submarines of the Imperial Navy left their Mediterranean bases and returned to Germany. UC 25 remained in Pola and was blown up by the crew on October 29th.

Individual evidence

  1. ^ Dieter Hartwig: Grand Admiral Karl Dönitz. Legend and Reality , Verlag Ferdinand Schöningh, Paderborn (2010), page 15

literature