Number of XBT profiles transmitted : 15(1 00.0%) 

 Number partial successes: 2(13.3%) 



Number reaching 400 m: 13 (86.7%) 



Of those reaching 400 m, the number satisfying the accuracy criteria at all three depths 

 was three (or 23.1%); at two depths was two (or 15.4%); at one depth was three (or 23.1%); 

 and at no depth was five (or 38.5%). To restate, of 13 area C XBT profiles reaching 400 m, 

 only 23.1% satisfied the accuracy criteria at three depths below the thermochne; 38.5% did 

 not satisfy the criteria at any of the three depths; the balance, 38.5%, did not satisfy the 

 criteria at one or two of the three depths. Yet, all 1 3 profiles were deemed acceptable 

 XBT traces by the observer and transmitted to FNWC as inputs to operational acoustic 

 parameter predictions. 



The above 1 3 XBT profiles are a subset of a set of 47 profiles to a depth of 400 m 

 that were made by the DE STEIGUER in area C during the SUDS I experiments. Of the 

 47 profiles, 10 (21 .3%) satisfied the accuracy criteria at all three depths, 41 (29.8%) did 

 not satisfy the accuracy criteria at all three depths, and 23 (48.9%) did not satisfy the 

 accuracy criteria at one or two depths. These statistics are somewhat similar to the statistics 

 for the 13 profiles transmitted to the FNWC, which suggests that the subset is a randorn 

 sample drawn from the total set of 47 profiles. 



Table 50 lists the differences between the 200-, 300-, and 400-m XBT temperatures 

 and the average hydrocast and STD/SV temperatures for the profiles transmitted to the 

 FNWC. The differences varied from -0.36°C to 1 .09°C, with four (9.3%) of the 43 differ- 

 ences greater than 0.50°C. 



Depth, 





















m 



95D 



96D 



97D 



98D 



99D 



102D 



108D 



112D 



115D 



200 



CF 



0.17 



0.10 



0.53 



0.46 



0.02 



CF 



-0.10 



-0.04 



300 





-0.08 



-0.11 



-0.12 



0.35 



-0.09 





-0.16 



-0.12 



400 





-0.11 



0.01 



0.30 



0.26 







-0.15 





Depth, 



















m 



122D 



125D 



128D 



131D 



137D 



141D 



144D 



148D 



200 



0.58 



-0.29 



1.09 



-0.25 



-0.08 



-0.36 



-0.36 



0.34 



300 



0.40 



-0.15 



0.36 



-0.08 



-0.05 



-0.23 



-0.16 



0.38 



400 



0.44 



-0.04 



0.70 



-0.22 



-0.16 



-0.23 



-0.31 



0.17 



Table 50. Summary of 200-, 300-, and 400-m temperature differences between XBT 



and average hydrocast and STD/SV temperatures for SUDS 1 XBT profiles taken 



by the DE STEIGUER in area C and transmitted to FNWC. 



122 



