why did the operator not have a DM monitor this buddy team instead of turning them loose on their own?
i dove this wreck as part of a northern itinerary and the operator had all divers that were on single tanks and not certified for deco to be escorted in groups of 4 by a DM. the other teams on doubles or ccr and appropriately experienced were allowed to plan their dives as they saw fit within a maximum run time.
iirc, there are fixed down lines to the wreck where stops can be done while hanging off, so no drift deco is required.