Sorry, I don't yet have an answer to that question - though you may want to try me on mobile
where I can do far more
How many A foot (plural: feet; abbreviation or symbol: ft or ′ (the prime symbol), the unit of length defined as being 0.3048 m exactly and used in the imperial system of units and United States customary unitses in a The nautical mile (symbol M, NM or nmi), the unit of length that is about one minute of arc of latitude measured along any meridian, or about one minute of arc of longitude at the equator?
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