SM UC-19
 SM UC-19 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 26 August 1915 and was launched on 15 March 1916. She was commissioned into the German Imperial Navy on 21 August 1916 as SM UC-19. In 3 patrols UC-19 was credited with sinking 4 ships either by torpedo or by mines laid. UC-19 was sunk by depth charges from HMS Ariel in the English Channel on 6 December 1916.