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    Sexagesimal (was Newbie - Variation..)
    From: Brian Whatcott
    Date: 2002 Feb 16, 22:05 -0600

    At 04:16 PM 2/16/02, Trevor Kenchington wrote:
    >Bearings expressed in 360-degree notation are, by definition,
    >constrained to be positive numbers in the range of zero to 360.
    Actually, it is not quite correct to suppose one can strictly refer to
    0 degrees AND 360 degrees.
    It's like saying numbers in the base 10 range from 0 to 10 rather
    than 0 to 9. These would be the numbers of the eleven-base
    number system.
    Your difficulty is in fact an inheritance from the Babylonian
    number system we use for angular measurements (usually)
      which was 60 based - but initially had  no symbol for a zero
    place holder, for example at the sixth cycle of sixties.
    But it is a small and academic point of no great interest to a
    Moreover, I am sure sailors and airmen sometimes use these
    designations interchangeably. All the same there are cases
    where this can lead to error.
    Brian Whatcott
       Altus OK                      Eureka!

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