AA guns equipped with foghorns?

[basesurge]

I'm an old ADA guy and I can assure you the M163 sound effect is pretty close. Wanna' hear a funny old war story...? Sure, you do...

Back when I was back in glorious ol' Fort Stupid, I mean Fort Stewart in the 80s. I was laying on my bunk on a Saturday afternoon getting myself spiritually prepared for another weekend night's drinking. I was listening to Pink Floyd's "Final Cut" album on my headphones. There's a section of one song where a ship is departing for the Falklands (one of the few places on Earth less livable than Southern Georgia). There is a ship's horn sound effect in the song mix. (This was the first time I'd listened to the album.) When this little effect came on I whipped off the headphones and went outside. Was somebody shooting a Vulcan? In garrison? On a Saturday? The thought of some dingbat saving up some 20mm somehow and going nuts with a Vulcan (unlikely but I wouldn't have put it totally past some of them...) filled me with mixed feelings. But then I slowly realized what it was and went back and listened to the tape again...
So, yeah, a Vulcan sounds a lot like a foghorn when it fires.