Surface combatants in contested waters: An opinion on the strategic, industrial, and doctrinal implications of the ASEAN warship build-up

The Association of Southeast Asian Nations (ASEAN) is in the midst of a synchronized, asymmetric, and analytically underexamined warship build-up. Between 2024 and 2026, Singapore launched RSS Victory as the first of six Multi-Role Combat Vessels with autonomous-warfare integration, Indonesia commissioned KRI Brawijaya-320 as the largest principal surface combatant in Southeast Asia, the Philippines awarded a contract for new frigate (Full Complement) batches under its Re-Horizon 3 program, Malaysia advanced the long-delayed Maharaja Lela-class frigate program with the launch of KD Raja Muda Nala, and Vietnam, Thailand, and Brunei continued discrete but consequential surface fleet renewal. These trajectories are typically reported as distinct national stories. This opinion article argues that they are best understood as a regional phenomenon with shared strategic logic but divergent industrial and doctrinal implementations. The article advances three claims: (a) the contemporary ASEAN warship build-up reflects a hedging-driven, multi-vector procurement pattern rather than a classical arms race; (b) the dominant industrial signature—East Asian and European shipbuilders supplying heterogeneous platforms across ASEAN—creates a structural fragmentation problem that limits the regional bloc's collective deterrent value; and (c) the strategic future of the surface combatant in ASEAN waters will be determined less by tonnage and firepower than by autonomy, networked integration, and the political-economic sustainability of local industrial bases. The article concludes with five policy recommendations for ASEAN navies, defense ministries, and the regional industrial ecosystem.