Please note that the information in the Development Blog is preliminary and subject to change.
Soon there will be a closed test session for attack aircraft carrying armor-piercing rockets. Please note that if the results are positive at the end of the test, detailed information about the future usage of this concept will follow.
The mechanics of these new rockets are similar to that of armor-piercing shells, with the main difference being –just like with armor piercing bombs– that their armor penetration is not dependent on the distance they are fired from, but is instead a constant value.
As per the current concept, these rockets on Tier X aircraft carrier squadrons will be close to 203 mm armor-piercing shells in terms of efficiency against different classes. Upon hitting destroyers there will often be overpenetrations and the total damage will be lower than with standard rockets. The new rockets will be most effective against cruisers due to their ability to hit their citadel and deal significant damage. When attacking battleships, most damage will be dealt when targeting the casemates – the penetration won’t be high enough to pass through the citadel’s armor belt.
Source: WoWS Devblog