More like they are cruising the north Arabian Sea. The last I read they have 24 ICBM's with Mirv warheads. Who knows? I'm glad no one knows. We also have boomers with Tomahawks in their missile silos. The boomers are why I sleep well at night. They are the most advanced deadly deterrent that exists.
Then, we have Aegis destroyers that carry Tomahawks, not to mention our stealth bombers, and our increasingly capable drones for surgical strikes. Yes, they are more at risk through counter-measures, but the boomers not so much.
Everyone in the strategic world knows that the conventional systems alone could devastate much of Iran's infra-structure in hours, no need for nukes.
I lived near Silverdale, WA, where they had the Alabama, Florida and several other boomers. Seems the guys, retired Navy, who rode the ferry to Seattle to work everyday, told me they had 24 on them with multiple warheads.