Currents are specifically mentioned as a possible problem at some of the sites. Currents however could be present anywhere at any time, we simply haven’t dived these sites often enough. We will always check out the current before we go diving.
We will not do drift dives. Drifting pack ice is a real hazard. If it comes in while divers are underwater then it can be very hard to see people if they surface in the middle of it. Icebergs should be either hard aground or floating in water well clear of brash or pack ice.