Drone warfare may be new, but small-boat operations; Surface-to-Sea missiles; aquatic mines; and long-distance cannons - those are not new. And those are probably enough to effectively close down the straights. To do so, Iran does not need to defeat and sink the US Navy force; it needs to occasionally hit some ships running the blockade. We saw this with the Bab Al-Mandab blockade, beginning in 2024; Yemen's military is not nearly as powerful as Iran's, and still, ships started avoiding the Bab Al-Mandab, because a, what, 20%? chance of being hit and taken over or sunk, with some of the crew possibly taken prisoner, is not something one does if one can avoid it, for the price of a longer journey.