![A chip log, also called common log, or ship log, is a navigation tool used by mariners to estimate the speed of a vessel through water. The name of the unit knot, A chip log, also called common log, or ship log, is a navigation tool used by mariners to estimate the speed of a vessel through water. The name of the unit knot,](https://c8.alamy.com/comp/G15N5R/a-chip-log-also-called-common-log-or-ship-log-is-a-navigation-tool-G15N5R.jpg)
A chip log, also called common log, or ship log, is a navigation tool used by mariners to estimate the speed of a vessel through water. The name of the unit knot,
St Kitts Nevis Coast Guard - Origin of Nautical Terms Knots ‑ The line tied to a ship's casting log to determine its speed was marked off by knots tied along its
Kenya Civil Aviation Authority on Twitter: "Did you know? Knots are the units for measuring speed recommended by the International Civil Aviation Organisation (ICAO). 1 knot is the speed required to travel
![Ever wondered how Knots and Nautical Miles came into existance? | Ships Aviation & Offshore Technology Ever wondered how Knots and Nautical Miles came into existance? | Ships Aviation & Offshore Technology](http://www.physlink.com/education/askexperts/Images/ae400d.jpg)