Not a diver but can understand the difficulties in 3+ knot currents. What is puzzling me, despite the constant droning of the media over how swift these underwater currents are, we are treated with video (like the one graciously posted lower last page) that appears to show the opposite. Divers meticulously poring over the tail section, with silt in the flashlight beams not really moving much at all, their exhausted gases rising vertically, and normal breathing ... in a nutshell it appears to be more similar to a training dive in a pool somewhere. What gives?
They maybe using scuba "safety stop anchors" to keep then in one place. I have dove in that region of the world and with currents as such. There have been many scuba accidents where the divers were swept out to sea by the currents such as these divers are facing. Another factor is the deep dive air mixture/required surface rest time (these divers typically use different air then a regular diver with those depths so that they can stay down longer) & fatigue for the divers such as cold temps at 100ft/sleep/stress/PTSD which is common for these rescue divers to have to deal with when retrieving bodies, so it is possible they are waiting for the right forecast conditions vs fatiguing their divers. There are 90 navy/commercial/certified rescue divers on this mission, that sounds like a lot of divers but it’s not when you are dealing with a complex mission & required surface rest time.