Row boats?
#3. Dozens, if not scores of attack Torpedo/Missile small PT-like ships, using the swarm tactic to overwhelm the defenses of any ship(s) they attack. They don’t care if they lost most of their men as “martyrs” if they succeed in sinking our ships and causing many casualties.
That is why using MOABs and Daisy Cutters (i.e. the Rachel Corrie Pancake Bomb and Cookie Cutter) would take them out in seconds.