James Clark Ross commands HMS Erebus on …

Years: 1841 - 1841
January
James Clark Ross commands HMS Erebus on his own Antarctic expedition and charts much of the continent's coastline between 1839 and 1843.

Captain Francis Crozier is second-in-command of the expedition, commanding HMS Terror.

Support for the expedition had been arranged by Francis Beaufort, hydrographer of the Navy and a member of several scientific societies.

On the expedition is Joseph Dalton Hooker, who had been invited along as assistant ship's surgeon.

Erebus and Terror are bomb vessels—an unusual type of warship named after the mortar bombs they are designed to fire and constructed with extremely strong hulls, to withstand the recoil of the mortars, which are to prove of great value in thick ice.

In 1841, James Ross discovers the Ross Sea, Victoria Land, and the volcanoes Mount Erebus and Mount Terror, which are named for the expedition's vessels.

They sail for two hundred and fifty nautical miles (four hundred and sixty kilometers) along the edge of the low, flat-topped ice shelf they call variously the Barrier or the Great Ice Barrier, later named the Ross Ice Shelf in his honor.

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