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Hey, Ahmed: its not just the “coatings” on your sub, its how much noise they make.

Yup, there are a HECK of a lot of ways to track a sub. I'd imagine that we have a SOSUS-style network covering the floor of the Persian Gulf at this point, for instance.

For years I've been intrigued by the possibility that the US has the capability to track subs using lasers that measure the movement of surface water when one passes below. That would be very effective in a relatively shallow pond like the Persian Gulf.

I'd guess that we keep pretty good track of whether the subs are in port or not, and track the sh*t out of them once they put to sea using every means at our disposal. And would consider a mass-movement to sea (or out of the Gulf) as a clear prelude to an attack.