In the case of the TR-3B Black Manta, it means a craft that uses highly pressured mercury accelerated by nuclear energy, so that plasma is produced, which, in turn, creates a field of anti-gravity ...

From the March 1958 Issue of Car and Driver. Seldom, if ever, remembering back over the last few years, have we ever met a man who bought a TR2 or a TR3 and regretted the purchase. We well ...