If you REALLY do a search, you'll find that a variant of S/S was used at the turn of the century (pre-1900) to control a submarine remotely.

This is an old technology, that is just incredible. The military/gov't/law enforcement loves it because it's difficult to identify, jam or otherwise corrupt.

FDR and Winston Churchill communicated with one another during WW2 via S/S transmissions to avoid enemy interceptions.

I believe the reason we haven't seen it sooner is due to a lack of "standards" which now exist for it's use. Unlike "dumb" systems on 27/49/72/75mhz, all devices operating on the ISM (industrial science and machines) band MUST incorporate an anti-collision technology which prevents two systems from operating on the same frequencies, etc.

We are experiencing a revolution in R/C. S/S is the best thing to happen to radio control since the advent of proportional control, and in a very short time....S/S will be the standard.

Modules upgrades? Yeah. OK... Keep waiting.

S/S is here, and it's better.