ILLUSTRATIONS 



1 Location of XBT measurements . . . page 4 



2 Location of Gulf of Alaska XBT measurements ... 5 



3 Location of SUDS I XBT measurements ... 8 



4 Location of ORB-3, ORB^, and RAPLOC/DEEPTOW XBT measurements ... 1 1 



5 Location of CAPER XBT measurements ... 13 



6 Example of a catastrophic failure ... 18 



7 Example of a partial success ... 19 



8 Example of a success ... 20 



9 Comparison of SUDS I temperatures measured simultaneously by the thermistor 

 chain and the STD/SV system. A positive difference indicates the thermistor 

 chain is measuring temperatures higher than the STD/SV system ... 30 



1 Comparison of Gulf of Alaska towed thermistor surface temperatures with 

 STD/SV and SVTP surface temperatures ... 32 



1 1 Comparison of CAPER's DE STEIGUER mercury-in-glass thermometer 

 surface temperatures with XBT surface temperatures ... 34 



12 Ogives of positive and negative differences between 1 53 XBT profile surface 

 temperatures and simultaneous thermistor chain temperatures made during 

 SUDS I ... 38 



13 Difference between surface temperature measured by the XBT system and the 

 thermistor chain during SUDS I plotted as a function of time of day ... 39 



14 SUDSIXBT 190Land253L. ..40 



1 5 Difference between Gulf of Alaska PLESSEY STD/SV (x), RAMSAY SVTP (x), 

 or XBT (•) temperature and towed thermistor surface temperature ... 43 



1 6 Ogives of positive and negative differences between Gulf of Alaska XBT 

 surface temperatures and towed thermistor temperatures ... 45 



17 Gulf of Alaska XBT 288 .. .46 



18 Gulf of Alaska XBT 302 .. .47 



1 9 Gulf of Alaska XBT 1 66 ... 49 



20 PLESSEY STD/SV (x), RAMSAY SVTP (x), and XBT (•) 

 400-m temperature in water mass 2 ... 50 



21 Gulfof Alaska XBT 197 ... 52 



22 Difference between CAPER's MOANA WAVE CTD/SV (x) 

 or XBT (•) and bucket surface temperatures ... 54 



23 Difference between CAPER's MOANA WAVE CTD/SV (x) 

 and XBT (•) 400-m temperatures ... 56 



24 Examples of MOANA WAVE visually acceptable XBTs. Only XBT 1 8 is 

 correct. XBT 56 and XBT 92 are incorrect ... 57 



25 CAPER'S MOANA WAVE XBT 94 and 96 taken 1 h 50 min apart 

 in time and 5.5 nmi from each other ... 58 



26 Positive and negative ogives of surface temperature differences ... 62 



27 Differences between quasisimultaneous XBT and STD/SV temperatures ... 75 



28 Comparison of Gulf of Alaska XBT ES 1-146 (— ) with STD/SV 39 

 (•) temperatures ... 76 



29 Comparison between average hydrocast and STD/SV and average thermistor chain 

 temperatures for area C ... 79 



