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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Leap second on December 31
From: David Pike
Date: 2017 Jan 3, 06:07 -0800
From: David Pike
Date: 2017 Jan 3, 06:07 -0800
John D. Howard you wrote: Why does the USA not define the foot as the length of George Washington's foot?
There are other contenders for the standard. At the recent RIN International Navigation Conference 16 in Glasgow, amongst the freebee mugs, sorbo rubber stress relievers, mouse mats, and spectacle cleaning cloths, one firm was giving away Nanosecond Rulers, 300mm/1ft being the ‘ballpark’ figure for the distance a GNSS signal travels in vacuo in one nanosecond. DaveP
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