Mao Kun map is often seen as a surviving document from the expeditions of the mariner whose ships could stretch past what length?
Mao Kun map Mao Kun map, usually referred to in modern Chinese sources as Zheng He's Navigation Map (), is a set of navigation charts published in the Ming dynasty military treatise "Wubei Zhi". The book was compiled by Mao Yuanyi in 1621 and published in 1628; the name of the map refers to his grandfather Mao Kun () from whose library the map is likely to have originated. The map is often regarded as a surviving document from the expeditions of Zheng He in addition to accounts written by Zheng's officers, such as "Yingyai Shenglan" by Ma Huan, "Xingcha Shenglan" by Fei Xin, and "Xiyang Fanguo Zhi" by Gong Zhen. It is the earliest Chinese map to give an adequate representation of Southern Asia, Persia, Arabia and East Africa.
William Parry (explorer) Rear Admiral Sir William Edward Parry, RN, FRS (19 December 1790 – 8 or 9 July 1855) was an English rear-admiral and Arctic explorer. His 1819 voyage through the Parry Channel was probably the most successful in the long quest for the Northwest Passage. In 1827 he attempted one of the earliest expeditions to the North Pole. He reached 82°45′ North latitude, setting the record for human exploration farthest North that stood for nearly five decades before being surpassed at 83°20′26″ by Albert Hastings Markham in 1875–1876.