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CHAPTER III. WIND 

 CONTENTS 



Page 



General 21 



Wind Direction 21 



General 21 



Entry of Wind Direction Data (dd) on Form 615-5 21 



Wind Speed 23 



General 23 



Entry of Wind Speed Data (ff) on Form 615-5 23 



True Wind from the Apparent Wind (Vector Method) 23-27 



General 23 



Surface Winds at Sea - Form 1209 24 



Plotting Board Method for Computing True Wind at Sea 26-27 



Wind Shifts 27-28 



General 27 



Entry of Wind Shifts on Form 615-5 28 



Radio Reporting of Wind Shifts 28 



TABLES 



Table 3-1. --Determination of Wind Speed by Sea Condition 22 



Table 3-2. --Apparent Wind Speed 23 



CODE TABLES 



Code Table 4. --Symbol dd--True Direction from Which Wind 



is Blowing 21 



FIGURES 



Figure 2. --Surface Wind at Sea - Form 1209 25 



Figure 3. --Shipboard Wind Plotter 26 



