PCG to use sonar to find sunken ferry in Basilan waters

PAGADIAN CITY, ZAMBOANGA DEL SUR, Philippines — Authorities are shifting their strategy in the search for the sunken M/V Trisha Kerstin 3, deploying sound navigation and ranging (sonar) technology after initial underwater drone missions failed to locate the wreckage. Hadji Muhtamad Mayor Arsina Kasing-Nanoh said on Sunday that the Remote Operated Vehicle (ROV) previously deployed