Jon Berndt wrote:
480:WIND1=WINDC*6080/3600

This equation attempts (but fails) to convert knots into feet per
second. A nautical mile is not 6080 feet, it is 1852 metres precisely
(1852/0.3048 ft).

So the equation should be:
480:WIND1=WINDC*(1852/0.3048)/3600