Mark XV
Mark XV or Mark 15 often refers to the 15th version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk."
Mark XV or Mark 15 can specifically refer to:
In technology
In military and weaponry
- Mark 15 torpedo, 1930 US Navy weapon plagued with development problems in World War II
- Supermarine Spitfire XV; a designation reserved for use with the Supermarine Seafire
- Mark 15 nuclear bomb; 1950s American thermonuclear bomb
- Mark 15 Phalanx CIWS; automated anti-missile gatling gun, entered US Navy service in 1980