Connect the radio to your gps and your location, speed and direction will be broadcast to anyone that is able to receive it including the CG once the emergency button is pressed.
I would agree that most radios on the market are good. (most don’t spend a weekend in the water, but that’s a good point) I was just going by the service of Standard Horizon. (made by Yaesu Steve)
I’ll also agree the antenna will make or break your radio but as I mentioned for “the area I fish” a 4 footer is more then ample and I don’t have to worry about it’s height. Your milage may vary.