Breaker and O'Neil 



Estimates of the average wavelengths have been computed 

 (they are shown in Table 1) using available environmental data 

 together with a ray-plotting program to determine the relative times 

 spent in each layer. Sensitivity analysis indicates that no more 

 than very slight deviations are to be expected. 



Finally, the actual average ranges and error -variances will 

 be computed from radar-log data kept during the experi ment . (The 

 values of L shown in Table 1 are nominal, as are thevXL.) 



Final results and conclusions will be available after 

 15 June 1967. 



381 



