Table 5. — Cruise 12, computed surface winds and currents at 20^^., 

 155°W. Winds were computed from the 1200Z U. 3. Weather 

 Bureau Synoptic Charts by the method described in the 

 U. 3. Hydrographic Office Miscellaneous Publication 

 11,275. Currents were computed by Ekman's formulae 



The fetch was computed and included as an index to the extent of the 

 v.lnd field. It was the distance between 20°N. , 150°W. and the point where the 

 curvature of the isobars increased until they made an angle greater than 30*^ with 

 their direction at 20°N., 150°V.'. 



6 



The wind direction was obtained by applying the rule that outside the 

 tropics in the Northern Hemisphere the wind over the ocean deviates 80 to the 

 right of the pressure gradient. 



