4U" 



1 1 1 r- 



1 1 



i \ 



1 1 



N 







\ 



/~^NSAN DIEGO 

















c t 2- 





\ \^ '""■ 



30° 





S.^^' 





^^ 



20" 



/ 



HONOLULU 



1 1 1 1 



1 1 



1 



1 1 



160° W 



130° 



120° 



110° 



Figure 2. Track of USS MARYSVILLE showing locations A fo P where data were 

 collected between San Diego and Honolulu. 



specifically, for each of two selected isotherms, to investigate the 

 depth change or slope; the autocorrelation of successive depth 

 measurements; and the power spectrum of the depth between San 

 Diego and Honolulu. 



EQUIPMENT 



The NEL thermistor chain has been described in previous 

 reports.^"* The sea and deck units consist of a chain hoist, chain 

 links, and the drum on which the chain is wound. This large, 

 rugged assembly weighs 37, 500 pounds. The chain is composed of 

 flat links about 1 foot long, 10 inches wide, and 1 inch thick. At 

 the end of the chain is a 2, 300-pound, streamlined weight, called 

 a "fish, " to hold it down. 



About 100 pairs of insulated electrical leads fit through 

 grooves inside the flat links. The electrical wires are connected. 



