These are mini subs capable of firing two torpedos or laying mines. They cannot fire missiles. With a fairly short battery life-these boats move very slowly under water. They are more like a manned mine than a sub. However, as the Cheonan incident showed last year-they can be deadly in certain circumstances... like shallow, enclosed waters.
Palestinian foreign minister filed report to ICC over torching of Duma home (Haaretz)
from the article: Iran Navy acquires new submarines amidst nuclear tension