Defensive AA Fire Data

					DEFENSIVE AA FIRE
Ship	Tier	Nation(s)	Duration (seconds)	Effect	Cooldown (seconds)	Charges
Florida, West Virginia 1944, Kansas, Minnesota, Vermont, Wisconsin	VII - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Mecklenburg	X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Renown, Rooke, Renown '44, Hawke, Duncan, Scarlet Thunder, St. Vincent	VI - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Hood, Thunderer	VII, X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Sun Yat-Sen	IX		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Cruisers (except Anchorage)	VI - XI		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Atlanta (B), Flint	VII		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	Unlimited
San Diego	VIII		30	+100% continuous damage,, all ranges. Damage from flak bursts quadrupled.	60	4
Yubari	IV		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	2
Cruisers (except Huanghe, Mengchong, Tokachi, Ägir, Admiral Schröder, Brennus, Kitakami, Perth, Mysore, Irian, Dalian)	VI - XI		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Petropavlovsk, Moskva, Sevastopol, Kommissar, Novosibirsk	X - XI		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Stalingrad	X		60	+25% continuous damage, all ranges. Damage from flak bursts quadrupled.	180	3
Hawkins, Devonshire, Dido, Surrey, Albemarle, Cheshire, Tiger '59, Hampshire, Nottingham, Drake, Goliath, Monmouth	V - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Duca d'Aosta Duca degli Abruzzi	VI, VII		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Coronel Bolognesi, Ignacio Allende, Santander, San Martín	VII - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	180	4
Nueve de Julio	VII		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Almirante Grau	VIII		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Cruisers (except De Zeven Provinciën)	VIII - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Tech-tree Destroyers, Halford, Forrest Sherman	V - XI		40	+100% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Premium Destroyers	VI - IX		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Ognevoi, Udaloi, Grozovoi, Neustrashimy	VIII - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Marceau	X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Loyang (B), Fenyang, Ship Smasha	VIII		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	4
Tech-tree Destroyers	VIII - XI		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Friesland, Velos	IX		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Groningen, Tromp	IX - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Felix Schultz, ZF-6, Elbing	IX - X		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3
Hector	IX		40	+50% continuous damage, all ranges. Damage from flak bursts quadrupled.	80	3

Most cruisers can exchange Defensive AA Fire for Hydroacoustic Search . Italian and American light cruisers have access to both Defensive AA Fire and Hydroacoustic Search simultaneously. American destroyers can exchange this consumable for Engine Boost .