7. The slopes of the log frequency vs the log of power 

 spectrum averaged nearly -5/3 or in the turbulence range. Small 

 deviations from the -5/3 slope occurred around 0.15 cycle per 

 minute (cpm) (0. 66 mile) in both the deeper and shallower iso- 

 therms and around 0.30 cpm (0.33 mile) in the shallower isotherm. 



RECOMMENDATIONS 



1. Continue development of the thermistor chain to improve 

 the quality, accuracy, and reliability of data. 



2. Investigate the use of additional sensors (in conjunction 

 with temperature) on the thermistor chain for measuring current, 

 turbidity, sound velocity, and salinity. 



3. Use the thermistor chain to study thermoclines and 

 associated internal waves and investigate the effects on thermo- 

 clines of islands, shoals, coastal configurations, tides, known 

 currents, upwelling, water-mass boundaries, storms, and 

 seasons. 



4. Examine in detail with the thermistor chain to determine 

 the most persistent areas of smooth, normal, rough, and irregular 

 thermoclines, and conduct sound transmission studies in, and 

 adjacent to, such features to evaluate their effect on sound trans- 

 mission. 



ADMINISTRATIVE INFORMATION 



Work was performed under SR 104 03 01, Task 0580 (NEL 

 L40461) by the Marine Environment Division. This report covers 

 the period February 1962 to February 1966. It was approved for 

 publication 29 July 1966. The authors wish to express appreciation 

 to P. G. Hansen, who led part of the cruise on which the data were 

 collected, and to O. S. Lee, G. H. Curl, and J. L. Cairns for 

 reviewing this report. 



