Harrison Passage is a passage between Larrouy

Larrouy Island

Larrouy Island is an island 5 nautical miles long and 2 nautical miles wide which rises to 745 m, lying in Grandidier Channel, 4 nautical miles north of Ferin Head. Discovered by the French Antarctic Expedition, 1903–05, under Charcot, who named it for Monsieur Larrouy, at that time a French...

 and Tadpole Island

Tadpole Island

Tadpole Island is an island just north of Ferin Head, off the west coast of Graham Land. Charted by the British Graham Land Expedition under Rymill, 1934-37. The name, given by the United Kingdom Antarctic Place-Names Committee in 1959, is descriptive of the island's shape when seen from the air....

s to the west, and Llanquihue Islands

Llanquihue Islands

Llanquihue Islands is a group of islands to the east of Larrouy Island, extending northward for 9 nautical miles from the west coast of Graham Land. Charted by the British Graham Land Expedition under Rymill, 1934-37. The name appears on a Chilean government chart of 1947 and is after the...

 and the west coast of Graham Land

Graham Land

Graham Land is that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in...

 to the east. Photographed by Hunting Aerosurveys Ltd

Hunting Aerosurveys Ltd

Hunting Aerosurveys Ltd was a British aerial photography company. It incorporated Aerofilms Ltd and the Aircraft Operating Company.In 1947 it was using three types of aircraft: Austers, a Percival Proctor and a D. H. Rapide and planned to acquire one or more Percival Mergansers...

. in 1956-57, and mapped from these photos by the Falkland Islands Dependencies Survey (FIDS). Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1959 for John Harrison

John Harrison

John Harrison was a self-educated English clockmaker. He invented the marine chronometer, a long-sought device in solving the problem of establishing the East-West position or longitude of a ship at sea, thus revolutionising and extending the possibility of safe long distance sea travel in the Age...

(1693–1776), English horologist who first definitely solved the problem of determining longitude at sea.