ARCTIC OCEAN

The Arctic is the smallest and shallowest of the world's oceans. Most of its surface is covered by a frozen mass of floating ice about 2 m (6 ft) thick.The North Pole lies in the centre of the Arctic Ocean on drifting pack ice.
ICEBERGS
Giant icebergs break off glaciers in Greenland and drift south into the North Atlantic Ocean. They rise up to 120 m (400 ft) above sea level. as only a fraction of an iceberg shows above water, they are shipping hazard.