ACOUSTIC MEASUREMENTS 



Sound-Speed Measurements 



The primary purpose of the scientific program usin| 

 the TRIESTE during Project NEKTON II was to obtain 

 sound- speed measurements in situ. Table 1 gives some 

 of the data obtained. 



TABLE 1. MEASUREMENTS OF SOUND SPEED, 

 TEMPERATURE, AND SALINITY FROM TRIESTE, 



Dive 

 Number 



Depth 

 (meters) 



Latitude 

 (°N) 



Temperature 



rc) 



Salinity 

 (%o) 



Sound Spe 



No. 1 

 (m/sec) 



3ed Meter 



No. 2 



(m/sec) 



77 



105 



13. 5 



26. 92 



34. 79 



1540. 78 



1540. 78 



77 



140 



13. 5 



25. 83 



35. 01 



1538. 86 



1538. 87 



54 



191 



32. 5 



9.06 



34. 08 



1488. 7 







77 



330 



13. 5 



13. 77 



34.47 



1507.79 



1507. 75 



76 



1180 



12. 7 



4. 15 



34. 67 



1485. 60 



1490.23 



55 



1209 



32. 5 



3. 38 



34. 53 



1480.40 







75 



1302 



13.4 



3. 54 



34. 50 



1485. 00 



1484. 86 



75 



2504 



13.4 



1. 77 



34.69 



1498.00 



1494.20 



75 



2598 



13.4 



1. 75 



34.66 



1499. 67 



1495. 93 



75 



2 598* 



13.4 



1. 72* 



34.66 



1499.42 



1495.64 



76 



5120 



12.7 



1.46 



34.67 



1542.43 







76 



5760 



12.7 



1. 44 



34.66 



1554. 68 







*30 minutes later. 



32 



