The best Iran can do is shoot at US bases and hit something there. Iran may be able to damage or destroy one ship of the US Navy , it cannot do anything against the rest, I am sorry.
there are currently 3-5 US destroyers only 200km away from Iran docked in Bahrain and not moving.
please explain to me why Iran cannot hit these ships with:
- air launched anti ship cruise missiles launched at stand off range by F-4 / F-14 / MiG-29 fighter jets near coast of Iran
- 20+ Ghadir subs patrolling Persian Gulf which only need to get within 10km
- UUVs and unmanned drone ships
- land based ASCM/ASBMs launched in large numbers
they don't need to be sunk. even one small hit by a drone would render it out of commission and remove their anti missile capabilities for a few months, which is long enough.
US ability to attack and defend is not dependent on the few ships currently in the Gulf. The only real constraint here is Mr Trump does not want to be trapped in another forever neocon war.
we can assume high rate of interception but key targets like oil fields and dense air bases don't need many hits
US abandoned Al Udeid base before it attacked Iran in June, we can assume it would also abandon most of its personnel from the key bases near Iran if there is a war
then the US is left with a CSG in the North Arabian Sea, which can be harassed by Fateh/Kilo subs + long range ASCMs + long range ASBMs + drones + container based ballistic missiles launched by container ships etc. even if they are not hit, which I accept is difficult, we saw how Yemen was able to harass them enough to make them lose 3 F-18 fighter jets in a short time and abandon that war.
and strategic long range bombers like B-2 but these have low sortie rate and if used with too much confidence can lead to shock loss, which could embarrass the US and make it end the war prematurely (these fluke events are unpredictable)
Hezbollah is finished. Houthis may disrupt traffic a bit but nothing beyond what they did last time. Iran Navy and air force will have the daylights beaten out of it if it tries to "Close the Straits of Hormuz". Be realistic.
IRIN + IRGC-N and IRIAF don't need to survive long. just long enough to get important initial blows in (hitting 5 US destroyers in the Persian Gulf), rest can be done from protected and dispersed ground launchers.
Hezbollah is severely degraded but not finished, their SG said recently if the US goes to war with Iran, they will intervene. they still have missile bases in the north and continue to smuggle weapons from Syria. it's now or never. they can attack shipping in the Med while Ansarallah disrupts shipping in the Gulf of Aden and Iran disrupts shipping in the Strait of Hormuz.
The impact of these simultaneous disruptions to key shipping lanes will be significant and you only need a small number of semi regular attacks on shipping to lead to a huge increase in insurance premiums and in gas prices. if this is sustained for weeks, you can't imagine significant pressure growing on TACO Trump to end the war?