Silkworm (missile)

The Silkworm missile was the NATO reporting name for these kinds of Chinese anti-ship missiles:

Shang You or SY-series
Hai Ying or HY-series
Fei Long or FL-series

These missiles were the Chinese version of the Soviet P-15 Termit missile. They used hot launch mechanism for launching the missile from ships.

Other websites
Federation of American Scientists page on HY-1
HY-2

Category:Missiles