0.3 



17 



0.4 



0.5 



0.6 



A, NAUTICAL MILES 

 0.7 0.8 0.9 



1.0 



1.1 



1.2 



1.3 



1.4 



A = 4377 ±426 FEET 

 A = 0.72 ±0.07 MILE 



-S. D. MEAN +S. D. 



Figure 12. Wavelength histogram for 17 sample areas. Horizontal bars are 

 mean wavelength for each sample area. Vertical lines are the mean 

 wavelength, and standard deviation as derived from the ensemble averages. 



28 



