SM UC-24 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 29 August 1915 and was launched on 4 March 1916. She was commissioned into the German Imperial Navy on 15 August 1916 as SM UC-24. In four patrols UC-24 was credited with sinking 4 ships, either by torpedo or by mines laid. UC-24 was torpedoed and sunk by off Cattaro on 24 May 1917. The wreck was found in late 2019 at a depth of 85m, 2 nautical miles from the mainland (Molunat, Dubrovnik, today's Croatia).
Like all pre-UC-25 Type UC II submarines, UC-24 had a displacement of 417t when at the surface and 493t while submerged. She had a length overall of 49.35m (161.91feet), a beam of 5.22m (17.13feet), and a draught of 3.650NaN0. The submarine was powered by two six-cylinder four-stroke diesel engines each producing 250PS (a total of 500PS), two electric motors producing 460PS, and two propeller shafts. She had a dive time of 35 seconds and was capable of operating at a depth of .
The submarine had a maximum surface speed of and a submerged speed of . When submerged, she could operate for at ; when surfaced, she could travel at . UC-24 was fitted with six mine tubes, eighteen UC 200 mines, three torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one 8.8sp=usNaNsp=us Uk L/30 deck gun. Her complement was twenty-six crew members.
| Date | Name | Nationality | Tonnage[1] | Fate[2] | |
|---|---|---|---|---|---|
| 4 February 1917 | Solbakken |  Norway | 2,616 | Sunk | |
| 6 February 1917 | Ellavore | Norway | 2,733 | Sunk | |
| 6 February 1917 | Havgard | Norway | 1,279 | Sunk | |
| 11 July 1917 | Siracusa | 3,187 | Sunk |