| Porthole 10 Jun 22

THE Southern Ocean floor has been mapped in its greatest ever detail, with scientists precisely charting its mountains, canyons and plains.

Covering 48km2 million, the map also details a new deepest point – a depression extending 7.4km down called the Factorian Deep.

The International Bathymetric Chart of the Southern Ocean has taken five years to compile and update the first attempt at a comprehensive map, which was published in 2013.