Navies of friendly countries keen on Indian sonars

[Hareeshu IA MBT]

If this sonar is better than Russian . Then already in development Most advanced than this is on the way .

It means it will set the benchmark of future sonar. We will be in world exports of sonar. .. true

World's best sonar and World's fastest anti ship missile producer

 

[narcon]

About my misconception of your intent, my apologies. The general course of discussion here, leads one to be a cynic.
About how the optimization of sonar was done by Indian Navy. I have to say I am unaware of the technical details. The part I was talking about was mentioned in a book on the Navy, which is the official history of Indian Navy, called from transitions to triumph.
One of the biggest lesson IN learned in 1971 was the ineffectiveness of the ship based sonar in detection of submarine especially due to the tropical conditions around India. Even the Russian supplied ships were unable to detect them. This forced them to work on development of indigenous sonar optimized for the conditions. I know this may not satisfy your curiosity. But the fact that we are replacing the sonar in kilo submarine with indigenous, shows that the Navy has a lot of faith in it.
The rivers from the Himalayas are high silt, also causing higher salinity, multiple factors along with the ones you have mentioned cause the difficulty in detection

Acoustics work different underwater than air. This is where the attenuation must be increased the most against these constant factors impeding proper propagation..
Silt also influences the water thickness hence the (same) specific gravity issue.
The readings of SG along with water temp and salinity content hamper the attenuation factor.
To increase the same you have to change the Khz/Frequency every time. So of course you have to modulate to increase the attenuation/decibels,,