STICKLER: NORMAL MODES IN OCEAN ACOUSTICS 



4950 



I r 



50 



DEPTH 

 (ft) 



100 



150 



200 I 1 L 



SOUND SPEED (ft/sec) 

 5000 



n r 



5050 

 1 1 — 



SOURCE (20 ft) 



RECEIVER (40 ft) 



BOTTOM 



I I I I I I I I I 



Figure 8. SOUND-SPEED PROFILE IN SHALLOW WATER 



147 



