I don't recall a downward current, I do remember on the second dive, the boat man or DM or who ever (hell blame it on me) kinda missed the drop off point, so it turned into a 'Navy Seal style' swim like hell, using the compass and hope we find the wall fast, kinda dive. I would have been lost without the DM. I would do it again using EANx, I went into a short deco mode as others got to stay down longer!