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28 second timers
Hi, I am trying to understand the origin of the 28 second interval used in
measuring the speed of ships. If a certain length of rope paid out in 28 seconds the ship was moving at 1 knot - if two paid out the ship sspeed was 2 knots etc. Why use 28 seconds? What is the origin of the 28 second interval? Peter Thejll Denmark |
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