NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Silicon Sea: Beaufort Wind Scale
From: Dan Hogan
Date: 2002 Oct 15, 09:32 -0700
From: Dan Hogan
Date: 2002 Oct 15, 09:32 -0700
Beaufort Scale of Wind Force
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No. Speed Description Height of Sea Deep Sea Criteria
Knots* Meters Feet**
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0 Less Calm - - Sea mirror smooth
Than 1
1 1-3 Light Air 0.08 1/4 Small wavelett like
scales, no crests.
2 4-6 Light Breeze 0.15 1/2 Small wavelets still
short but more
pronounced Crests
glassey and do not
3 7-10 Gentle Breeze 0.6 2 Large waveletts crests
break.Foam is glassy.
Crests begin to break.
Foam is glassey.
4 11-16 Moderate Breeze 1.0 3 1/2 Small waves becoming
longer; more frequent
white horses.
5 17-21 Fresh Breeze 1.8 6 Moderate waves, and
longer; many white
horses.
6 22-27 Strong Breeze 2.9 9 1/2 Large waves begin to
form; white crests more
extensive.
7 28-33 Near Gale 4.1 13 1/2 Sea heaps up; white foam
blown in streaks.
8 34-40 Gale 5.5 18 Moderately high waves of
greater length; crests
begin to form spindrift.
Foam blown in well
marked streaks.
9 41-47 Strong Gale 7.0 23 High waves dense streaks
of foam. Crests begin to
roll over.
10 48-55 Storm 8.8 29 Very high waves with
long overhanging crests.
Surface of the sea
becomes white with
great patches of foam.
Visibility affected.
11 56-63 Violent Storm 11.3 37 Exceptionally high
waves. Sea completely
covered with foam.
64+ Hurricane The air is filled with
spray and visibility
seriously affected.
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* Measured at height of 10 meters (33 feet) above sea level.
** In the open sea remote from land.
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Dan Hogan WA6PBY
C27 "Gacha"
dhhogan1@earthlink.net
Nav-L Page: http://www.wa6pby.com
