By November 9, 2025, INS Sahyadri — India's indigenously designed and built Guided Missile Stealth Frigate — arrived at Guam in the Northern Pacific to participate in Exercise Malabar 2025, the annual multilateral naval exercise involving the navies of India, the United States, Japan, and Australia (the Quad nations). The harbour phase of Malabar 2025 included operational planning sessions, communication protocol alignment, familiarisation visits, and sports fixtures among the participating nations. The sea phase (November 13–17) saw operations including Anti-Submarine Warfare (ASW), Visit Board Search and Seizure (VBSS), gunnery firing, underway replenishment (UNREP), and cross-deck helicopter operations. INS Sahyadri, built under the Aatmanirbhar Bharat initiative, exemplifies India's growing indigenous shipbuilding capability. Exercise Malabar — first held bilaterally between India and the US in 1992 — has evolved into a cornerstone of Quad defence cooperation for maintaining a free, open, and rules-based Indo-Pacific order.