I'm not to worried about any kind of submarine they may or probably dont have. We've thumped their Navy pretty well. They do have some AShM's "anti-ship missiles" they can wheel out of caves and fire off. They still have a few speed boats left over they can use as platforms too. The USN is weak in one regard and thats with mine clearing ships since we made the mistake of depending on allies to provide most of that capability.
And our allies ain't worth a shit. I still dont know if any are even heading that way and even if they are they will need about 5 layers of Lawyering before getting directly involved. Mines may be asymmetric but they are very dangerous. I think were putting the squeeze on the rest of the world since we get only 2% of our oil from the Gulf and America is an oil producing super-power.
Look nobody wanted this but Iran simply had to be reckoned with. For 47 years we've been eating their shit while one weak President after another put stupid policy after stupid policy in place as Iran and their proxies murdered our people and caused havoc across the Middle East. I was stationed in S/E Turkey in Nov. 1979 when these fanatic mongrels over ran our embassy and took our diplomats hostage. We drew weapons, ammo, and gear and were told to wait at the Dorm for the order that never came. But Carter never sent us and even tho we were young at the time we knew it was a mistake and those very same Fundamentalist nut jobs in that embassy then are the same ones running the place now, well, at least the ones we and the Jews haven't whacked yet.
And once they get nukes on top of ICBMs and IRBMs, and maybe with MIRV'ed warhead Bus's and decoys, whats to stop them from charging a couple/three million for every ship that passes thru those straights ? What are the Europussies going to do about it ? A nuclear Iran will redraw every alliance and coalition in that Hemisphere, which is their overall strategy, to break the American defense hegemony that has kept the peace, more or less, for so many years. They want all these countrys questioning why would America risk NYC or Chicago to aid them ?
And then theres the cascading nature of nuclear expansion in the region. The Saudi's and Turks for sure would go nuclear along with other countrys as well. This is 80yo technology and relatively easy to develop given time. The flight times are short, the trigger fingers would be itchy, and I have no doubt the Iranians would intend to wipe out the Jews. They have pretty good long range cruise missiles, which are first strike weapons. The Ukraine Mob sold them Soviet ones when the Union fell and it kickstarted their development program.