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05-13-19, 02:36 AM | #1 |
Neptune's daughter
Join Date: Apr 2007
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Maths Helper - Find Speed from plot of Distance and Time
Find Speed
1. Get Total Distance in Metres 2. Get Total Seconds: Sum ( Hours multiplied by 3600, minutes multiplied by 60 and seconds ) 3. Get Corrected Time: Multiply Total Seconds by 0.5144. 4. Get Speed in Knots: Divide Total Distance in Metres by Corrected Time Hope that helps. |
05-13-19, 06:18 AM | #2 | |
Grey Wolf
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05-13-19, 10:58 AM | #3 |
Silent Hunter
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As I also added into discord: If you stick to intervals of 3 minutes and 15 seconds (properly 194.4 seconds) then speed in knots shows itself as a distance in hectometer units (100m) between the plots. As such, 13 minutes is a nice round number period to average the plots over 4 intervals.
If you were to measure in imperial units (yards) then it would require 3 minutes.
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