Cazelet33
I didn't understand your reference to prop aeration muddling acoustic links between the ship and the ROV. The deep water installation vessels that I work with all have their ROVs powered and controlled via reeled umbilicals, I.e. the ROVs are physically connected to the ships and do not rely on acoustic signals between the two.
Even the AUVs (autonomous underwater vehicles) that I've worked with are pre-programmed, dumped in the water to do their sonar runs, then come back up at end of mission for recovery and data download - no acoustic comms during the scanning run.