The navy has sent a frigate and Kilo class submarine to the Red Sea, mainly to show that the Iranian Navy can do this, but also to look for Somali pirates (who don’t usually operate that far north). A similar voyage had taken place last June, but that mission did not last long.
Anti-piracy patrols? With a Kilo? I think not.
But a Kilo would be mighty handy if the Iranians wanted to try to intercept an Israeli submarine carrying cruise missiles (conventional or nuclear) heading for patrol areas in the Arabian Sea within range of Iran.