This. I've been instructed to meet up at 30 ft "as soon as possible" after doing backroll entries in Coz, but that was nothing compared to diving a SE Florida wreck in fairly strong current. I'm a newb at this, but I'm still amazed that the Captain could position us so perfectly (un-moored and moving), and that three of us could drop in negative, sink at >99ft/min while moving quite fast horizontally in the current, and still hit spot-on the wheelhouse of the Hydro Atlantic (ca. 130ft) as a group. I know it's "just physics and vector math", but it was still very impressive to me. We did suck the air out of our wings, and especially with doubles there was nothing neutral about the entry
The consequences of dawdling on the descent - ending up far down-current of the wreck - would have been painful (as in not diving the wreck.) Obviously the captain and crew were familar with the dive plan. When they said "Dive! Dive! Dive!" they didn't mean "when you feel like it".