Harrison Passage

Harrison Passage
Connects waters	Grandidier Canal
with water	Holtedahl Bay , Pendleton Strait and Crystal Sound
Separates land mass	Larrouy Island and Tadpole Island
of land mass	Llanquihue Islands and Graham Coast
	Data
Geographical location	65 ° 54 '32 " S , 65 ° 10' 36" W Coordinates: 65 ° 54 '32 " S , 65 ° 10' 36" W

The Harrison Passage is a deep strait of the Southern Ocean that can be navigated by all classes of ship . It is located between Larrouy Island and Tadpole Island to the west, as well as the Llanquihue Islands and the Graham Coast of Graham Land on the Antarctic Peninsula in the east.

The Falkland Islands Dependencies Survey mapped the passage using aerial photographs from Hunting Aerosurveys Ltd. from 1956 to 1957. The UK Antarctic Place-Names Committee named it in 1959 after the British watchmaker John Harrison (1693–1776), whose clocks were the first to have the precision required to accurately determine the longitude at sea.

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