Actually, it is clear. What Ukraine is doing would not work in the open ocean, they're simply too small. However, the basic concept could be applied. Russia

Actually, it is clear. What Ukraine is doing would not work in the open ocean, they're simply too small. However, the basic concept could be applied. Russia and China have been building big weapons intended to dash through the defenses fast enough that not all of them will be picked off. Our doctrine has been different, stuff meant to sneak though defenses. But it's still missile vs interceptor. However, the war in Ukraine (and to a lesser degree the one in Israel) has shown that for the same cost in weaponry you can deliver more by overwhelming your target with simple things. I'll stick to western systems because they're easier to get numbers for. You want to attack a US naval force? Get a whole bunch of Boghammers or the like. Seems to be about $200k/unit. Since they're going to be stripped down units you can probably put simple robotic controls on for the cost of the systems you're not including. Total sitting ducks vs what they're going against--but the cheapest missile in the magazines capable of being fired at a Boghammer costs 5x as much. Sure the fleet will know they're coming but what can they do? We have already seen that it doesn't take very many units to overwhelm Russian gun defenses, we probably fare not better.