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To find the position of a ship or aircraft by celestial navigation, the navigator measures with a sextant the apparent height of a celestial body above the horizon, and notes the time from a marine chronometer. That height is compared with the height predicted for a trial position; the arcminutes of height difference is how many nautical miles ...
Two sample pages of the 2002 Nautical Almanac. The Nautical Almanac has been the familiar name for a series of official British almanacs published under various titles since the first issue of The Nautical Almanac and Astronomical Ephemeris, for 1767: [1] this was the first nautical almanac to contain data dedicated to the convenient determination of longitude at sea.
Sea Cloud is a sailing cruise ship owned by Sea Cloud Cruises of Hamburg, Germany.Launched as a private yacht as Hussar V for Marjorie Merriweather Post in 1931, she later served as a weather ship for the United States Coast Guard and United States Navy during World War II, when she became the U.S. military's first racially integrated warship since the American Civil War. [1]
Here's your rare chance to inhabit the seafaring world of Marjorie Merriweather Post. Here, what it's like to sail the Mediterranean on the Sea Cloud yacht.
A diagram of a typical nautical sextant, a tool used in celestial navigation to measure the angle between two objects viewed by means of its optical sight. Celestial navigation, also known as astronavigation, is the practice of position fixing using stars and other celestial bodies that enables a navigator to accurately determine their actual current physical position in space or on the ...
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A navigator determines the bearing (the compass direction from the craft's current position) of the next waypoint. Because water currents or wind can cause a craft to drift off course, a navigator sets a course to steer that compensates for drift. The helmsman or pilot points the craft on a heading that corresponds to the course to steer. If ...