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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 ...
Sea of clouds in Mount Pulag, Philippines. A sea of clouds is an overcast layer of stratocumulus clouds, as viewed from above, with a relatively uniform top which shows undulations of very different lengths resembling waves on the sea. [1] A sea of fog is formed from stratus clouds or fog and does not show undulations. [2]
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 Dead Reckoning, DR, is calculated by using a previously determined position on a chart, and advancing that position based on known or estimated speed over a set amount of time. This can be calculated by using the formula Speed = Distance ÷ Time. [3] Once an advance position has been plotted, then set and drift can be factored in.
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.
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Tide tables give the height of the tide above a chart datum making it feasible to calculate the depth of water at a given point and at a given time by adding the charted depth to the height of the tide. One may calculate whether an area that dries is under water by subtracting the drying height from the [given] height calculated from the tide ...