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A navigator who needed to know the speed of the vessel had a sailor drop the log over the ship's stern. The log acted as a drogue , remaining roughly in place while the vessel moved away. The sailor let the log-line run out for a fixed time while counting the knots that passed over.
The term originally referred to a book for recording readings from the chip log that was used to estimate a ship's speed through the water. [1] Today's ship's log has grown to contain many other types of information, and is a record of operational data relating to a ship or submarine , such as weather conditions, times of routine events and ...
A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally ...
Hull speed or displacement speed is the speed at which the wavelength of a vessel's bow wave is equal to the waterline length of the vessel. As boat speed increases from rest, the wavelength of the bow wave increases, and usually its crest-to-trough dimension (height) increases as well. When hull speed is exceeded, a vessel in displacement mode ...
For the most accurate reading, always check the breast or thigh for a more reliable indication of overall doneness. The Right Temperature for Turkey.
LIDAR speed gun; Radar speed gun, a Doppler radar device, using the Doppler effect for indirect measurement of velocity. Speedometer; Tachometer (speed of rotation) Tachymeter; Variometer (rate of climb or descent) Velocimetry (measurement of fluid velocity) For the ranges of speed-values see: Orders of magnitude (speed)
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