According to the Iranian news outlet IRIB News, the Islamic Revolution Guards Corps (IRGC) Navy received 110 indigenously made combat speedboats on December 11 during a ceremony in Bandar Abbas….
“This is the seventh delivery of such vessels. Their speed has climbed from 55 knots to 75 and 90 knots, with the next stage reaching 110 knots. The boats are equipped with missiles and rockets and are capable of operating efficiently under the IRGC’s indigenous radar network.”
It’s not impossible the Iranians are employing deception tactics and may be redelivering boats seen in previous delivery media events, but there is little doubt, they do have a lot of fast attack craft, making the Coast Guard’s PATFORSWA operating area a rough neighborhood. (More here, here, here, here, and here.)
Considering if PATFORSWA is ever in a fight with the Islamic Revolutionary Guard Corp Navy, the cutters will probably be protecting tankers or Navy high value units. In that case, frankly I think most of the smaller craft are intended as a diversion, the primary threats are the missile and torpedo equipped boats that will screened by a cloud of smaller boats. Still machineguns and rockets mounted on small boats could damage the cutters.
If you want to consider if we can deal with the Iranian tactics, you might want to look at this earlier post, Guns vs the Swarm.