The P-15 Termit is an anti-ship missile developed by the Soviet Union's Raduga design bureau in the 1950s. Its GRAU designation was 4K40, its NATO reporting name was Styx or SS-N-2. China acquired the design in 1958 and created at least four versions: the CSS-N-1 Scrubbrush and CSS-N-2 versions were developed for ship-launched operation, while the CSS-C-2 Silkworm and CSS-C-3 Seersucker were used for coastal defence. Other names for this basic type of missile include: HY-1, SY-1, and FL-1 Flying Dragon, North Korean local produced KN-1 or KN-01, derived from both Silkworm variants and Russian & USSR P-15, Rubezh, P-20 P-22.
A P-15M missile (SS-N-2c) being unloaded from a former East German Navy Tarantul class missile boat
INS Chamak (K95) of the Indian Navy fires a P-15 Termit missile
P-15 missile, Steven F. Udvar-Hazy Center
SY-1 Missile
MKB Raduga is a Russian aerospace company, concerned with the production of various missile-systems and related technologies. It is headquartered in Dubna, Moscow Oblast. Formerly a division of the Mikoyan-Gurevich design bureau, it was spun off as a separate OKB in March 1957.
MKB Raduga facility in Dubna
Kh-22 missile memorial near MKB Raduga in Dubna