Add to ORKGjam vIt is with this constantly moving, splitting, wheeling, cracking, roaring jagged mass of ice that the sealing skippers had to contend, working their way slowly towards the seals as openings appeared, allowing ships to remain jammed for days at a time when the ice was tight, always taking their chances on being crushed and sunk.PRINTED ITEM JH 5/79G.M. Story 5/79Used I and SupNot usedNot usednot be jammed, jam-blockChecked by Sarah Budgell on Thu 09 Apr 2015; Checked by Cathy Wiseman on Wed 15 Jul 201