Table 3. Direction of wind or waves (in 10 ' s of degrees, from 

 which wind is blowing or from which waves come) 



Symbol dd — True direction, in 10's of degrees, FROM which wind is 



blowing (00-86) 



Symbol dud a — Direction, in 10's oj degrees, FROM which waves come 



Note. — In case a vessel is equipped with an anemometer and the true wind 

 speed exceeds 99 knots, 50 will be added to "dd" and only the wind speed in excess 

 of 100 knots will be coded. For example, if direction ■= 163° and speed =121 knots, 

 the wind will be coded as "6621" (dd = 16 + 50; ff =121-100). 



Table A. Wind speed 

 Symbol jj — Wind speed in knots 



Code 

 figures 



00 

 02 

 05 

 09 

 13 

 18 

 24 

 30 

 37 

 44 

 52 

 60 

 68 



Beaufort No. 



Zero 



One— . 

 Two... 

 Three,. 

 Four„. 

 Five--. 



Six 



Seven.. 

 Eight.. 

 Nine... 

 Ten---. 

 Eleven. 

 Twelve 



Description 



Calm 



Light airs 



Light breeze 



Gentle breeze 



Moderate breeze 



Fresh breeze 



Strong breeze 



Near gale 



Gale 



Strong gale 



Storm 



Violent storm 



Hurricane 



Equivalent 



speed in 



knots 







1-3 

 4-6 

 7-10 

 11-16 

 17-21 

 22-27 

 28-33 

 34-40 

 41-47 

 48-55 

 56-63 

 64 and above 



Note. — In case a vessel is equipped with an anemometer and the true wind 

 speed exceeds 99 knots, 50 will be added to "dd" and only the wind speed in excess 

 of 100 knots will be coded. For example, if tie direction = 163° and speed=121 

 knots, the wind will be coded as "6621'' (dd= 16 + 50; ff=121-100). 



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