JANUARY, FEBRUARY, MARCH 



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5740 OBSERVATIONS 



10 AVERAGE NUMBER OF OC- 





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DURATION (HOURSI 



PERSISTENCE OF FAVORABLE SEAS « 6, 9, 12 FT.) 





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5760 OBSERVATKDNS 



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140 





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10 AVERAGE NUMBER OF OC 

 CASIONS DURING THE SEA 

 SON WHEN WAVES ROSE 

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20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 

 DURATION (HOURS! 



PERSISTENCE OF UNFAVORABLE SEAS (g 6, 9, 12 FT.) 



O 10 20 30 40 50 60 70 80 90 ICO 



APRIL, MAY, JUNE 



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15 AVERAGE NUMBER OF OC- 



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40 60 60 100 120 140 160 180 200 220 240 260 280 300 

 DURATION (HOURS) 



PERSISTENCE OF FAVORABLE SEAS (< 6, 9, 12 FT.) 



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RVATIONS 



(AGE NUMBER OF OC- 

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20 40 60 80 100 120 140 160 180 200 220 

 DURATION (HOURS) 



PERSISTENCE OF UNFAVORABLE SEAS (^ 6, 9, 



260 280 300 



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10 20 30 40 50 60 70 80 90 100 



FIGURE 5H OSV "J" 52.5°N., 20.0°W. 



