No size limits on either sex!
If it is a buoy or float with a flag there are divers underneath towing it. The flag may be a little ways behind depending on the current and how much line they have out. If there is a boat with a flag, such as on the antenna, the divers should be underneath it in the general area. As a diver also, I like to see boaters keep a little distance. Nothing like a six arm umbrella rig cruising by your nose!! lol Or a 10" plug with 2 giant treble hooks.....
You wernt by chance at Pegotty Beach in Scituate?