Hi Folks, I'm sure one of you out there will know the answer to this one. Anyone any idea how well a 1.3GHz radio transmission will penetrate fresh water. I build model subs and I know that standard 40MHz Radio control gear works well down to ten feet or so. I'm thinking of mounting a black and white TV camera on a sub. I've seen a transmission system that uses the 1.3GHz telemetry bands to carry a video feed, but I'm not sure how well it will work. So any help would be much appreciated - Oh and it is not that off topic the Sub has two PICs in it, one for depth/attitude control the other for speed control! Andy