Uh... yeah... see...
Ummmm. The legal call-letters on 93.3 in FWB are actually WNCV, which--no matter how you try to pronounce it--really doesn't resemble "coast." Maybe something like "wunnkuvv" but even with a New York accent it really doesn't sound anything like the word "coast." Betcha a buck it has something to do with Niceville, Florida from back in prehistoric times when the station was on 100.3 and it was actually licensed to Niceville. Now 100.3 is WTKE, which--again--cannot be pronounced "Niceville."
Like, for instance, there are hundreds of stations around the country that call themselves "kiss," but there's only one with the legal call-letters KISS (San Antonio).
Granted, LA's KOST is probably the closest you're gonna get to "coast," though a lot of folks would call it "cost" if they had the chance.
Alright, enough. Point is that someone who should know once told me (rightly or wrongly) that the WCOA call-letters on Pensacola's 1370 were intended to represent the word "coast"--which kind of makes sense when you consider the Gulf Coast location. I'll betcha that same buck that they were right.
And since Cumulus owns WCOA(AM) and therefore has first right of refusal to use those calls on an FM, I'm (still) a tad surprised that they haven't used them. Maybe even in Shalimar (FWB).