After Indian Air Force hit the Jaish terrorist factory in Balakot, one of the most advanced Pakistani Agosta-class submarines - PNS Saad - vanished from the Pakistani waters, a senior government source said. After 21 days of an extensive search, the Indian Navy finally located the PNS Saad on the western side of Pakistan.

from Times of India https://timesofindia.indiatimes.com/india/post-balakot-indian-navy-hunted-for-pakistani-submarine-for-21-days/articleshow/69913418.cms