CNS News 
Aug 9, 2010
Iran announced the addition of four new submarines to its fleet Sunday, saying the Iranian-manufactured vessels to be deployed in the Persian Gulf have sonar-evading technology and can launch torpedoes and missiles simultaneously.
The announcement comes amid continuing warnings by senior Iranian officials about retaliatory actions in the Gulf in response to any military strike by the U.S. or Israel aimed at Iran’s nuclear facilities.
In the latest warning, the commander of the Islamic Revolution Guards Corps (IRGC), Brig. Gen. Yadollah Javani, said Saturday Iran’s enemies have never dared to attack because of the vulnerability of the waterway.
“If anything happens in the Persian Gulf and the Strait of Hormuz is closed, the possibility of using this route will be lost for decades, and this will be a great tragedy for the global economy,” he told the IRNA news agency.