First Rock is a rock lying 1 nautical mile (1.9 km) south-southeast of Brode Island

Brode Island

Brøde Island is a small, rounded tussock-covered island, southwest of Green Island, off the southern tip of South Georgia. It was first charted in 1775 by a British expedition under James Cook; it was roughly surveyed by a German expedition, 1928–29, under Kohl-Larsen, who appears to have used...

 and 2 nautical miles (3.7 km) south of Cape Disappointment

Cape Disappointment (South Georgia)

Cape Disappointment is a headland which forms the southern extremity of South Georgia. It was first charted and so named in 1775 by a British expedition under James Cook, who upon reaching this position was greatly disappointed in realizing that South Georgia was an island rather than a continent....

, the south extremity of South Georgia. It is first (southernmost) in a line of three insular features south of Cape Disappointment discovered in 1775 by Captain James Cook

James Cook

Captain James Cook, FRS, RN was a British explorer, navigator and cartographer who ultimately rose to the rank of captain in the Royal Navy...

. So named because of its position by DI

Discovery Investigations

The Discovery Investigations were a series of scientific cruises and shore-based investigations into the biology of whales in the Southern Ocean. They were funded by the British Colonial Office and organised by the Discovery Committee in London, which was formed in 1918...

personnel who charted South Georgia in the period 1926-30.