



Temperature °C 





Depth, 

 m 



CTD/SV 25 

 27 August 0030LST 



Hydrocast 1 

 26 August 1838LST 



Difference 



1312 



2.97 



2.99 



-0.02 



1752 



2.23 



2.29 



-0.06 



2200 



1.87 



1.89 



-0.02 



2659 



1.65 



1.67 



-0.02 



Table 1 1 . Comparison of CAPER CTD/SV 25 and hydrocast 1 

 temperature measurements. 



During RAPLOC/DEEPTOW, 18 hydrocast temperature measurements were 

 obtained simultaneously with nine CTD/SV temperature measurements by attaching two 

 sets of reversing thermometers on the CTD/SV cable just above the CTD/SV sensor package. 

 These comparisons are summarized in table 12. An inspection of these data shows that the 

 CTD/SV temperatures are consistently higher than the hydrocast temperatures. The average 

 of the 18 comparisons was 0.01°C with a standard deviation of 0.01°C. It is concluded 

 that the RAPLOC/DEEPTOW CTD/SV system error is -0.0 1 °C. 





Depth, 





Temperature °C 









Reversing 





Number 



m 



CTD/SV 



Thermometer 



Difference 



7 



518 



5.52 



5.50 

 5.49 



0.02 

 0.03 



8 



1016 



3.86 



3.86 

 3.86 



0.00 

 0.00 



4 



1511 



2.71 



2.71 

 2.70 



0.00 

 0.01 



10 



1514 



2.74 



2.74 

 2.73 



0.00 

 0.01 



6 



1526 



2.69 



2.68 

 2.66 



0.01 

 0.03 



3 



2014 



2.09 



2.07 

 2.06 



0.02 

 0.03 



9 



2523 



1.78 



1.79 

 1.78 



-0.01 

 0.00 



2 



3017 



1.64 



1.64 

 1.63 



0.00 

 0.01 



5 



3521 



1.58 



1.57 

 1.55 



0.01 

 0.03 



Table 12. Comparison of RAPLOC/DEEPTOW CTD/SV and 

 reversing thermometer temperatures at maximum depth. 



24 



