History.com................the SI......mag......Nat. Geo...............nat. parks....................military..........have things in common..........common authors...........common people overseeing things........the American illuminati.........as i have to spell everything out for u.............as u continue to "love" me .......while u allow them to humiliate me and sexually harass me.........leaving all the work to me................paying me lip service..............but at the same time...............allowing them to abuse me...........offering prostitutes........thinking that that will allmeoriate the sitatution..............yet another sarcastic thanks for destroying my life........



Ancient mariners used to gauge how fast their ship was moving by throwing a piece of wood or other floatable object over the vessel’s bow then counting the amount of time that elapsed before its stern passed the object. This method was known as a Dutchman’s log. By the late 16th century, sailors had begun using a chip log to measure speed. In this method, knots were tied at uniform intervals in a length of rope and then one end of the rope, with a pie-slice-shape piece of wood (or “chip”) attached to it, was tossed behind the ship. As the vessel moved forward, the line of rope was allowed to roll out freely for a specific amount of time, which was typically tabulated with an hourglass. Afterward, the number of knots that had gone over the ship’s stern was counted and used in calculating the vessel’s rate of speed. A knot came to mean one nautical mile per hour. Therefore, a ship traveling at 15 knots could go 15 nautical miles per hour.