The submarines will be built under the much-talked-about strategic partnership model that allows domestic defence manufacturers to join hands with leading foreign defence majors to produce high-end military platforms to reduce import dependence.
All 274 personnel who were on board barge P305 that sank and the tugboat Varaprada that went adrift during Cyclone Tauktae fury have been accounted for, the Navy said.
Five teams were deployed in Ernakulam district on Friday.
While all the 137 people on board the cargo barge GAL Constructor were rescued, 180 of the 273 onboard P305 have been rescued so far.
This is the fourth major drug bust by the Indian Navy and the Coast Guard which had stepped up monitoring in the sea after reports that maritime drug smuggling involving Sri Lankan fishing boats was on the rise.
The Indian Navy said that the boat with its crew has been escorted to the nearest port in Kochi for further investigation.
The centaur-class aircraft carrier, INS Viraat, was in service with the Indian Navy for 29 years before being decommissioned in March 2017.
The Indian Navy asserted that the samples are being sent for DNA testing for confirmation of identity.
The basin trials were conducted in the presence of Flag Officer Commanding-in-Chief, Southern Naval Command (SNC) Vice Admiral A K Chawla and CSL Chairman and Managing Director Madhu S Nair.
It was for the first time ever the three Services tested the readiness of BrahMos systems within the duration of one week.