SM UC-38 was a German Type UC II

German Type UC II submarine

Type UC II minelaying submarines were used by the Kaiserliche Marine during the World War I. They displaced 417 tons, carried 7 torpedoes and up to 18 mines...

 minelaying

Minelayer

Minelaying is the act of deploying explosive mines. Historically this has been carried out by ships, submarines and aircraft. Additionally, since World War I the term minelayer refers specifically to a naval ship used for deploying naval mines...

 submarine

Submarine

A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

 or U-boat

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...

 in the German Imperial Navy  during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. The U-boat was ordered on 20 November 1915 and was launched on 25 June 1916. She was commissioned into the German Imperial Navy on 26 October 1916 as SM UC-38."SM" stands for "Seiner Majestät" (His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine. In 9 patrols UC-38 was credited with sinking 40 ships, either by torpedo or by mines laid.

On 14 December 1917, by 38°15′N 20°22′E, under Hans Hermann Wendlandt, UC-38 met a French convoy comprising the fast cruiser Chateaurenault

French protected cruiser Châteaurenault

The Châteaurenault was a protected cruiser of the French Navy intended for commerce raiding. She was the first ship of the French Navy named in honour of François Louis de Rousselet, Marquis de Châteaurenault....

, serving as a troopship, and her escorts Mameluk

French destroyer Mameluck (1909)

-Service history:Tasked with escort duties in the Mediterranean Mameluck assigned to the 1st Squadron in June 1911, and a year later she was assigned to the 2nd Destroyer Squadron, of the 1st Fleet. In March 1913 she was assigned to torpedo squadron patrols and to support submarines in the Adriatic...

, Rouen and Lansquenet. UC-38 approached and fired one torpedo on Chateaurenault, which was hit in her middle section at 6:47. UC-38 dived at 38 metres, while the Mameluk and Rouen rushed to the launching position of the torpedo, and Lansquenet started picking up people thrown overboard by the explosion. Chateaurenault requested her escorts to close in and evacuate personnel, which was completed by 07:26. The trawler Balsamine came to the rescue and made attempts to take Chateaurenault in tow.

Back to periscope depth, UC-38 saw Chateaurenault still afloat, and fired a second torpedo, which hit at 8:20; Chateaurenault foundered quickly, but all personnel still alive aboard could be rescued. Lansquenet, in the process of picking up her launches, rushed to the launching point and fired 7 depth charges. One caused a light leak in the submarine; captain Wendlandt ordered a dive to bring his ship below the area targeted by the grenades, but a false manœuvre made UC-38 climb instead, and a second explosion caused a large leak, forcing Wendlandt to crash surface and abandon ship.

UC-38 surfaced briefly and was immediately targeted by the guns of Mameluk, which continued her attack by launching several depth charges. UC-38 surfaced again, and this time both Mameluk and Lansquenet opened fire, hitting her several times and killing several of her crew as they exited. She sank at 8:40, and the French destroyers picked up the survivors.

German sources claim that 25 men were rescued and 9 killed; a sailor of UC-38 claimed that 20 men were saved out of a 28-man crew; French enquiry reports 20 rescued and 5 confirmed dead out of a 27-man crew.