Source: WG
ST, Smoke mechanics update.
Firing from inside the smoke now results in ship-to-ship detection range increase (this type of firing did not influence detection before, and the firing ship stayed permanently concealed). The exact value is calculated for each ship based on its concealment and caliber. Average range is 2.5 km for destroyers, 5.9 km for cruisers and 13,6 km for battleships. Effect duration is 20 seconds. This change should make smokes firing tactics less viable for those ships that were not intended for such tactics gameplay-wise: BBs and most cruisers. Additionally, there is more reward for active play and the risk of rushing into enemy smoke.
Ship-to-ship detection for smoke firing now applies not only for the ship in smoke, but also if there is a smoke cloud on LOS between the shooter and the target. That will allow to exclude a highly illogical situation when hiding behind smokes gives better concealment than hiding inside smokes. Ship-to-ship detection for smoke firing is calculated for each hull, based on caliber and base concealment, it is not influenced by any skills or upgrades. It does not replace guaranteed detection and still requires LOS (smokes excluded for this check). The exact value for each ship can be found in Port specs. Similar to current main gun firing penalty, the effect lasts for 20 seconds only if the ship was detected as a result of firing.
