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P-15 Termit


Early generation Termit missiles | NATO: SS-N-2A & B Styx


Overview


P-15 Termit

P-15 Termit anti-ship missile on display at a US Air Force base. Note that the solid propellant booster is missing.
Source: US DoD - © Public domain

Origin
Soviet Union
Type
Anti-ship missile
Entered service
1960 for P-15
1960 for P-15U
Status
In service
Development
1955 - 1959 (design project)
1956 - 1957 (test launches)
1958 - 1959 (Soviet state trials)
Developer
Soviet Union - OKB-155 / MKB Raduga
Production
1960 - 1990's?
Producer
Soviet Union - Progress plant, Arsenyev
Number produced
Produced in large quantities
Designations
4K40 (GRAU index for P-15 Termit
4K40U / 4K41 (GRAU index for P-15U)
SS-N-2A Styx (NATO reporting name for P-15)
SS-N-2B Styx (NATO reporting name for P-15U)
Notable users
Soviet Union
Egypt

Description


Introduction

The P-15 Termit is an early Cold War era anti-ship missile of Soviet origin. It was developed as a cost effective missile to arm small missile boats. The P-15 Termit is notable for being the first anti-ship missile sinking a Western destroyer, the Israeli INS Eilat in 1967. The P-15 Termit was produced in large numbers. The variants including a wide range of Chinese models and the late generation Soviet P-15M, which are described separately. Despite being obsolete by today's standards small numbers remain in service.

Design

The P-15 Termit is a large cylindrical anti-ship missile with swept wings and three tail fins. A solid propellant booster rocket located underneath creates initial velocity and is then jettisoned. The sustainer engine at the rear uses highly toxic liquid propellant. The fuel and oxidizer are held in two large tanks. The warhead is located in the middle and the seeker is located in the nose.

Guidance

Targets are detected by the ship's surface search radar and entered into the guidance section using the fire control computer. An autopilot guides the missile to the target area. The active radar seeker has a detection range of 10 to 20 km, depending on target size and weather conditions. A variant with a large infrared seeker was developed as well. The P-15 Termit flies 100 to 300 meters above sea level.

Firepower

Maximum range of the P-15 Termit is about 40 km. Flight speed is subsonic at about Mach 0.9. Practical range might be less due to the radar horizon of the launch vessel. The chance to hit a frigate size target is about 70%. The high explosive warhead is rather large, containing over 300 kg of explosive.

Variants


P-15 Termit

P-15 Termit (NATO: SS-N-2 Styx) subsonic anti-ship missile being loaded onto a vessel.
Source: Unknown author - © Copyright lies with original owner

P-15
Initial production model, introduced in 1960. Fixed wing version with active radar homing warhead. GRAU index is 4K40 and NATO reporting name is SS-N-2A Styx.
P-15U
Second generation Termit missile, introduced in 1965. Features folding wings, but otherwise nearly identical dimensions and performance as the earlier P-15. GRAU index is 4K40U or 4K41 and NATO reporting name is SS-N-2B Styx.
P-15UT
Variant of the P-15U which replaces the active radar homing seeker with the Kondor infrared homing seeker. Less common variant than P-15U. GRAU index is 4K41T and NATO reporting name is SS-N-2B Styx.

Details


Facts P-15 Termit P-15U Termit P-15UT Termit
General
Origin
Soviet Union
Type
Anti-ship missile
Dimensions
Length
6.55 m including booster
Diameter
0.76 m
Wingspan
2.4 m wide
1.58 m tall
Weight
2.125 t at launch
340 kg detachable booster
Guidance
Terminal phase
Active radar homing, MS-2 radar
10 to 20 km detection range
Initial phase
AM-15A autopilot
Barometric altimeter
Warhead
Type
4G15 high explosive
Weight
480 kg, including 300 - 350 kg explosive
Fuse
AB-522-1 impact fuse
Engagement envelope
Propulsion
Liquid fuel sustainer rocket motor
TG-02 fuel and AK-20K oxidizer
SPRD-30 solid propellant booster
Speed
Mach 0.9
Range
40 km maximum
30 - 35 km practical
8 km minimum
Altitude
Selectable flight level of 100 to 300 m above sea level

Launch platforms


Note: incomplete list

Project 183R class

The P-15 Termit was first introduced on the Project 183R (NATO: Komar) class fast missile boat.

Project 205 Moskit class

The Project 205 Moskit (NATO: Osa class) can launch four P-15 Termit missiles. The improved Project 205U and ER (NATO: Osa II) are armed with the folding wing P-15U missiles.