Essentially any carriers fleets in the gulf could get trapped. To safetly move them out during or after the attack, the military would need to do something nobody is even talking about, a ground invasion to secure the area. My advice would be to not send too many of our assets into this little corner of the world. And its important to note that all the sourounding countries, not just Iran, could potentially have Iranian forces present and equipt with the missiles. Definately in Iraq and Saudi Arabia.