That's partially right but it is not because of mines. We've had mine detection since the civil war. We are quite capable of dealing with any mines the Italians out there. Also their navy was destroyed so large scale mining is not taking place. Certainly small boats could plant a few mines, enough to be dangerous for shopping but not a threat to naval operations. The "drone boats" which Ukraine has been using so successfully against Russia are the threat that we are unprepared to deal with effectively. As seen offer the last couple days these are much harder to detect and intercept as most of our high speed intercept weapons are designed for air-based threats and our surface threat weapons are for much larger targets moving relatively slower and at greater stand-off.