So Matt, just to confirm my understanding:
1) A Kirov, for example, has 4 AD of Drones. It uses ADD mode repeatedly during the turn and is reduced to ADD 0. At that point the G-rack is out of ADDs and cannot fire ANY type of drone for the rest of the battle?
The description for G-racks in the Federation ship listings section says that if the G-rack fires in ADD mode that it gains "ammo" equal to the number of Drone AD the ship has. If the rack runs out of ammo while in ADD mode, then the ship cannot fire drones for the rest of the battle. It also cannot then later use the rack in ADD mode because the ship is out of drones (ammo 0) and trying to use ADD mode gives the "0" ammunition level?
2) If said Kirov loses some ADD ammo during a turn but is not reduced to 0, at the start of the next turn it may then again fire ADD with a ammo value of 4 (the lost ammo is magically replaced).
It seems to me that if #1 is false and #2 is true, that it's going to be really hard to knock the ADD down to 0, and then score enough hits to destroy the Kirov. Because if you don't then next turn you have to start all over again beating down that magically restored ADD ammo of "4". For sure, one had best concentrate a ton of drones on it to make sure you kill it.