FIGURES 



Page 



1. Aerial Photograph of Sea Surface, Photograph courtesy of 

 Capt. D. B. MacDiarmid, USCG 2 



2. Envelope and Amplitudes of a Wave Record ..^ 12 



3. An Artificial Wave Record 12 



Trough amplitude equals preceding crest amplitude. 



Heights uncorrelated 



4. An Artificial Wave Record 18 



Trough amplitude equals preceding crest amplitude. 



Heights correlated with the value of unity, two by two 



5. The Definition of the "Periods" in a Wave Record 31 



6. The Representation of a Wave Record as a Sum of 

 Individual Sinusoidal "Cycles" with Different "Periods" 



in an Artificial Wave by Wave Analysis 38 



7. The Representation of a Wave Record as a Sum of Many 



Sine Waves with Individual True Periods 39 



TABLES 



1. Wave amplitude data in cumulative ascending 10% values 6 



2. Greatest wave amplitude data 7 



3. Confidence values of >/e 16 



m 



4. The significant height, average height, and percent of 

 waves omitted in terms of the average height of all 



waves in excess of 4, 10, or 20 feet 23 



5. Data obtained by USCGC UNIMAK 141800Z to 141900Z of 

 February 1953 24 



6. Corrected data on the basis of the theory of truncated 

 distributions 25 



7. Comparison of corrected and uncorrected visual height 

 observations with forecast values. February 1953 26 



8. F(B.) as a function of B 34 



1 1 



VI 



