While the U. S. largely refuses to sign because it would place the critical northwest passage within Canadian territorial waters rather than international waters.
Canadian explorers have found one of two ships used by the British Arctic explorer Sir John Franklin to search for the Northwest Passage 170 years ago.
加拿大探家发现了英国北极探家约翰·富兰克林爵士(Sir John Franklin)170年前探索西北海道使用的两艘船只之一。
French explorer, Rene-Robert Cavelier, built the Griffon on the Niagara River, in Canada, with the plan to use the ship to explore the Great Lakes and find the Northwest Passage to China.