- shoaler during the southwest monsoon off the Somol! Republic, 

 Muscat and Oman, and south of Java. 



• Anomalous critical depths in the Andaman Sea are caused by greater 

 sound velocities at depth. 



• Reversing monsoon circulation does not effect sound velocity structures 

 below 200-300 meters except in regions of upwelling, 



• The overall data distribution in the North Indian Ocean is better than 

 that found in most major oceanic areas. 



30 



