SOUND VELOCITY (mps) 

 1480 1500 1520 



1540 



500 



WEST 



1000 



^ 1500 



J 

 I 



2000 



EAST 



2500 



EAST: ♦36.43.48 

 WEST: •40.46.47,51 



3000 



Figure 3. 

 422 



