The need for more sonar?

The armament orders of warships, and of their sonar systems. are made public on a weekly basis. Though the public databanks in which the details are listed are little known, one can easily sign up for an online newsletter and have updates sent to you on a weekly basis, free of charge.

There are actually currently less than 400 submarines in existence outside of NATO. On account of these few boats, a billion-dollar defense industry is created to deploy the most powerful technologies and to detect the threat over long distances.

DEUTSCH