Kortik / Kashtan
A Kortik combat module (missiles absent)
Type	Close-in weapon system
Place of origin	Soviet Union, Russia
Service history
In service	1989–present[1][2]
Used by	See Operators
Production history
Designer	Developer: KBP (Arkady Shipunov)[1][2] Fire control system: RATEP[1]
Designed	Late 1970s–?
Manufacturer	Tulamashzavod, RATEP[1][3]
Produced	1989–present
Variants	Kortik-M / Kashtan-M[1][2][4]
Specifications
Mass	15,500 kg (34,200 lb) (Kashtan)[1] 12,500 kg (27,600 lb) (Kashtan-M)[1]
Height	2,250 mm (89 in) (above deck)[1][2]
Shell	HEI-Frag, Frag-T, APDS-T[1][5]
Shell weight	0.39 kg (0.86 lb) (HEIF, FT)[6] 0.30 kg (0.66 lb) (APDS-T)[6]
Caliber	30×165mm AO-18[N 1]
Barrels	2 × 6 (guns); 2 × 4 launch tubes
Action	Gas-operated rotary cannon
Rate of fire	Kashtan:[N 2] 9,000 rounds/min (guns)[1] Kashtan-M:[N 2] 1–2 (salvo) missiles per 3–4 sec[1] 10,000 rounds/min (guns)[1][2]
Muzzle velocity	860 m/s (2,800 ft/s) (HEIF, FT)[1] Kashtan-M: 960 m/s (3,100 ft/s) (HEIF, FT)[1][2] 1,100 m/s (3,600 ft/s) (APDS-T)[1][2]
Effective firing range	By missiles: Kashtan:[1][2][4] 1,500–8,000 m (4,900–26,200 ft) Kashtan-M:[1][2][4] 1,500–10,000 m (4,900–32,800 ft) By guns: Kashtan: (range, altitude) 500–4,000 m (1,600–13,100 ft),[1][4] 3,000 m (9,800 ft)[1][4] Kashtan-M: 300–5,000 m (980–16,400 ft)[2][4]
Feed system	Link-less, helical; 1000 rounds[1][7]
Sights	Radar / TV-optical:[4][N 3] 2–3/1 m (6.6–9.8/3.3 ft) accuracy,[1] tracks 6 targets simultaneously[1]
Warhead	Continuous-rod w/ frag layer[1][2][4]
Main armament	8 × 9M311K + 32 missiles[1][N 4][N 5] Kashtan-M: 8 × 9M311-1E + 24 missiles[7][N 4]
Secondary armament	2 × AO-18K autocannon[1] Kashtan-M: 2 × AO-18KD autocannon[2][4]
Flight altitude	3,500 m (11,500 ft) (Kashtan)[1][2] 6,000 m (20,000 ft) (Kashtan-M)[1][4]
Speed	910 m/s (3,000 ft/s)[1]

The Kortik (Russian: Кортик, English: Dirk) close-in weapon system (CIWS) is a modern naval air defence gun-missile system deployed by the Russian Navy. Its export version is known as Kashtan (Russian: Каштан, English: Chestnut), with the NATO designation CADS-N-1 Kashtan.^[8]

The Kortik is found on the Russian aircraft carrier Admiral Kuznetsov, Kirov-class battlecruiser, Neustrashimy-class frigate; and the People's Liberation Army Navy Sovremenny-class destroyers, and other modern designs. Typically deployed as a combined gun and missile system, it provides defence against anti-ship missiles, anti-radar missiles and guided bombs. The system can also be employed against fixed- or rotary-wing aircraft or even surface vessels such as fast attack boats or targets on shore.

The Kortik will be replaced in Russian Navy service by the Pantsir-M CIWS, which uses similar rotary cannons but different missile and radar systems.^[9]