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. NEW DELHI: The Indian Navy, along with other agencies, is set to carry out the maritime exercise ‘Sea Vigil’ spanning an unprecedented scale, both in terms of geographical reach and.