I was thinking of chlorine gas bombs/rockets or cyanide torpedoes to kill everyone inside a sinking ship or on the general vicinity of the battle to insure that no one survives...
The only objective of the weapon system is to insure 100% kill rate of every human inside or outside of the ship once it has been sunk or burning or in process of being attacked by my carriers.
The goal of the weapon system is to ensure the secrecy of the carriers by achieving zero survivability of any human crews. Out of sight, out of mind.
The sinking of the ships will happen in an Arctic or Atlantic like oceans
Enemy ships has zero AA capabilities