India cancelled its latest Notice to Airmen (NOTAM) on December 15, 2025, for a vast 3,550-km no-fly and no-sail zone over the Bay of Bengal, originally set for December 17-20—marking the second such revocation this month after the December 1-4 window. Issued by the Directorate General of Civil Aviation, the alert hinted at a DRDO long-range missile test, possibly a K-4 SLBM, but was abruptly withdrawn, fueling speculation of strategic maneuvering against Chinese “research” vessels like Shi Yan-6 active in the Indian Ocean Region. From an Indian security lens, these feints validate missile systems while probing Beijing’s response times, bolstering deterrence amid escalating maritime tensions and underscoring New Delhi’s resolve to counter PLA Navy encroachments in critical sea lanes.