The 40mm bofors quad mounts are unlocked, but I keep tha ammo in a dedicated magazine down below the waterline, except for 200 rounds in a locked ready locker on the rail next to each mount.

The 5" 38 twin mount is also unlocked and the ammo is in a magazine below the waterline too. It is separated from the 40mm magazine though. Both magazines can be flooded by remote control from the command bridge.

The sea sparrow launchers alway have missiles in them though, but that is only 8 missiles per launcher