The Siren Board

So I recently went to Coronado CA, because where I live there are no sirens . The City website says that there are only 3 sirens (Whelen Vortex) but I seem to have found 3 FS modulators!! (only got 1 photo.) Located across the street from Glorrieta Bay Park. Can anyone tell me what is going on????

Ahaha, I saw the nearby building in a meme (the symbol... you know what I mean), and decided to check around on Maps. Found something that resembles a siren nearby, which you saw, and I desperately tried to find a picture of it with no luck.. until now. Good one on spotting that!