PG NO FURTHER A MYSTERY

Submersible ROVs could possibly be "no cost swimming" the place they work neutrally buoyant over a tether with the launch ship or platform, or they may be "garaged" in which they work from the submersible "garage" or "tophat" on the tether hooked up towards the large garage that's reduced within the ship or System.Some Innovative ROVs in wreckage A