I wonder if you put a full magazine of 556, 30 rounds worth into one of these animals if it would deter them and they would stop doing that to the boat. Or would it not matter. Or worse just piss them off ,not sure.
Play Yoko Ono
Or Slim Whitman (works on Aliens from Outer Space 🌌🌌🌌)
You’d likely hit vitals, and kill at least one. They aren’t stupid animals...I think they’d break off the attack. Seal bombs wouldn’t kill, but I think they’d deter.
Shooting one of these critters with .556 would probably just piss it off.
It might be that these orca’s see these boats as trespassing into their territory.