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Beaufort wind scale Force 4

BEAUFORT WIND SCALE FORCE 4

Force 4

− Wind speed 11 − 16 kn or 5.5-7.9 m/sec

mean, 13kn or 7 m/sec

(Small waves, becoming longer; fairly frequent white horses)

  BEAUFORT WIND SCALE FORCE 4

Photograph − I G MacNeil, Courtesy of the Meteorological Office

Written by Master

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