Sentences with phrase «for celestial navigation»
But when the military began launching GPS satellites in the 1970s, it was the beginning of the end for celestial navigation.
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He's a sundial aficionado, whose love for the heavens has taken him to Lake Titicaca in Bolivia and sailing in the North Atlantic, where he earned his celestial navigation certificate through the School of Ocean Sailing and Navigation.
But because a second defined in that way fails to account for the slowing of Earth's rotation, it wreaked havoc with celestial navigation, which in the 1960s was still guiding ships across the globe.
Being one of the oldest branches of natural science, astronomy is diversified into celestial navigation astrometry, observational astronomy, and calendar - making, but professionals working in this field consider it to be a synonym for astrophysics.
Saturday, June 2, 10:00 a.m. — 4:00 p.m. Sailing canoe rides for all ages, picture story boards and «talk story» opportunities with race team members (some who sailed the Hokule`a) about celestial navigation and the history of the Hawaiian sailing canoes.
Sailing canoe rides for all ages, picture story boards and «talk story» opportunities with race team members (including former Hōkūle`a crew members) about celestial navigation and the history of the Hawaiian sailing canoes.
: As all dates are + / - 2.5 billion years, the author strongly advises against using this chronology for purposes of exegesis, carbon - 14 dating or celestial navigation.
(6) Any vehicle used or designed for flight or navigation in space and on the registry of the United States pursuant to the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, Including the Moon and Other Celestial Bodies and the Convention on Registration of Objects Launched into Outer Space, while that vehicle is in flight, which is from the moment when all external doors are closed on Earth following embarkation until the moment when one such door is opened on Earth for disembarkation or in the case of a forced landing, until the competent authorities take over the responsibility for the vehicle and for persons and property aboard.