LIST OF FIGURES 



Figure 

 No. Page 



1 Locations of Surface Duct Acoustical Experiments 2 



2 Ping-to -Ping Signal Variability: Comparison Between 



Areas at 3000 cps 5 



3 Ping-to -Ping Signal Variability: Comparison Between 



700 cps, 1300 cps and 3000 cps in Area II 7 



B-l Tracks of USS Marysville, USNS Charles H. Davis 



and USS Rexburg in Boundary Water Region (Area I) B-2 



B-2 Tracks of USS Marysville, USNS Charles H. Davis 



and USS Rexburg in Transition Water Region (Area II) B-3 



B-3 A Thermal Profile Obtained by Thermistor Chain 



from USS Marysville in Boundary Water Region 

 (Area I) B-5 



B-4 A Thermal Profile Obtained by Thermistor Chain 



from USS Marysville in Transition Water Region 

 (Area II) B-7 



B-5 Sound Velocity Profiles Obtained by USS Rexburg 



in Boundary Water Region (Area I) B-10 



B-6 Sound Velocity Profiles Obtained by USNS Charles 



H . Davis in Boundary Water Region (Area I) B-ll 



B-7 Sound Velocity Profiles Obtained by USS Rexburg 



in Transition Water Region (Area II) B-12 



B-8 Sound Velocity Profiles Obtained by USNS Charles 



H. Davis in Transition Water Region (Area II) B-13 



C-l Block Diagram of Acoustical Recording Equipment 



on USS Rexburg C-3 



C-2 Block Diagram of Transcription Equipment Used 



in Data Reduction C-5 



artbur ZB.HittIe.3nr. 



