Argentina's Coast Guard (Prefectura Naval Argentina - PNA) alerted all sailing ships this week of three icebergs near Ushuaia and advised them to avoid all unnecessary approaching these ice floes, of which only 10% is visible on the surface. The first detection was reported last Saturday by the Argentine-flagged fishing vessel Echizen Maru and the latest spotting came through on Monday at the Beagle Channel exit into the open sea.