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    • CommentAuthorAsterix
    • CommentTimeJan 4th 2020
     
    Mathematical model predicts knot stability

    Angus would probably appreciate this.
  1.  
    Pull loops through. Don't pull ends through, that just makes more knots.
    •  
      CommentAuthorAngus
    • CommentTimeJan 4th 2020
     
    Always tie a bowline. All other knots jam.
    •  
      CommentAuthorgoatcheez
    • CommentTimeJan 4th 2020
     
    1.15 mph
  2.  
    "Mobile in mobile element" was the motto of Jules Verne's Nautilus.
    •  
      CommentAuthorAngus
    • CommentTimeJan 5th 2020
     
    One second per hour along a meridian
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      CommentAuthoralsetalokin
    • CommentTimeJan 5th 2020 edited
     
    Yes, but: the ship's log, and airspeed indicators. A second of arc along a meridian is motion of the observer without respect to the medium, only with respect to the underlying frame, but the ship's log and the airspeed indicator measure motion of the observer with respect to the medium, which itself is in motion wrt the frame.
    •  
      CommentAuthorAngus
    • CommentTimeJan 5th 2020 edited
     
    True, if interesting.

    I think these days of gps, though, people use knots as a measure of rate of course over ground. If I were able to motor at 5 kt and I got into a 3 kt countercurrent I think I would rate my speed at 2kt, not 5kt.

    Much more useful for navigational purposes.