The biennial exercise, led by the Indian Navy, is being conducted in two phases. The first phase, the Coastal Defence and Security Readiness Evaluation (CDSRE), is underway from November 11 to 17, followed by the Sea Phase on November 18 and 19. The fifth edition of the Pan-India Coastal Defence Exercise 'Sea Vigil-26' is being held from 11 to 19 Nov 2026, coordinated by the Indian Navy.