The Russian Arctic Convoy Museum Group has organised the reunion as part of its Arctic Convoys Week, which will run from 6-11 May.

BBC: Reunion at Loch Ewe for Arctic Convoys veterans

It can only operate for 12 hours at a time, which will keep humans in the area, but its ability to run untethered below storms and cold Arctic winds should dramatically expand the territory that researchers can cover during their share of a larger five- to six-week journey.

ENGADGET: University of Victoria's Mano underwater robot to prowl Arctic waters for legendary ships