Rostislav was a pre-dreadnought battleship built by the Nikolaev Admiralty Shipyard in the 1890s for the Black Sea Fleet of the Imperial Russian Navy. She was conceived as a small, inexpensive coastal defence ship, but the Navy abandoned the concept in favor of a compact, seagoing battleship with a displacement of 8,880 long tons (9,022 t). Poor design and construction practices increased her actual displacement by more than 1,600 long tons (1,626 t). Rostislav became the world's first capital ship to burn fuel oil, rather than coal. Her combat ability was compromised by the use of 10-inch (254 mm) main guns instead of the de facto Russian standard of 12 inches (305 mm).

The QF 3-pounder Hotchkiss or in French use Canon Hotchkiss à tir rapide de 47 mm were a family of long-lived light 47 mm naval guns introduced in 1886 to defend against new, small and fast vessels such as torpedo boats and later submarines. There were many variants produced, often under license which ranged in length from 32 to 50 calibers but 40 caliber was the most common version. They were widely used by the navies of a number of nations and often used by both sides in a conflict. They were also used ashore as coastal defense guns and later as an anti-aircraft gun, whether on improvised or specialized HA/LA mounts.