11175, 4724, 15016 are equally pretty busy. Mostly exercises when you hear more activity than normal. Here in NORCAL, I typically receive the EAMs stronger on 15016 and 4724kHz. I put the R75 on ATT, NB on NR on, and squelch a cat hair off breaking point, and I will get reliable squelch breaks of EAMs filling the QTH with volume high piped through my AV unit with 5 speakers and sub in the living room. Why-I don't know, I have no idea what they're conveying but I love hearing it. Hobby I guess.