Scuba Dive Flags, GPS & Safety Gear
Florida Law states that Divers and snorkelers shall make reasonable efforts to stay within 100 feet of a divers-down warning device on rivers, inlets, and navigation channels. A person operating a vessel on a river, inlet, or navigation channel must make a reasonable effort to maintain a distance of at least 100 feet from any divers-down warning device. 
Also Stay Safe and connected to the ones you love when you're diving miles from cellphone coverage with the Garmin® inReach® Mini 2 Satellite Communicator. Featuring global satellite coverage, you can send and receive texts even when there's no cellphone coverage to be found.