Assess the role of coast guards in minilateral maritime cooperation.

Minilateral groupings like the Quad increasingly operate through coast guards rather than navies. The QUAD-at-Sea Ship Observer Mission — ICG Ship Shaunak sailing from Chennai for Perth on 25 September 2026 with six "Sea Riders" [1] — shows both the distinctive value and the present limits of this instrument.

Why coast guards suit minilateral cooperation

• Low political signature: the participating agencies are the Indian, Japanese and US Coast Guards and the Australian Border Force — law-enforcement, not military, bodies [2]. A coast guard interdiction reads as policing, not power projection.
• Task fit: the real daily threat is IUU fishing, up to 26 million tonnes of fish annually [4], alongside smuggling, trafficking and pollution — core coast guard mandates.
• Confidence-building: cross-embarkation builds shared watchkeeping and procedures, advancing interoperability and mutual trust [1], and dovetails with SAGAR/IPOI and the MAHASAGAR vision [1][2].
• Public goods: capacity-building, humanitarian outreach and maritime rule of law widen the grouping's regional acceptability [2].

Limits of the coast-guard route

• Observation is not joint operation: Sea Riders participate in shipboard activities and professional exchanges [1]; they exercise no command or boarding authority.
• Absent legal cross-authorisation: without shiprider-type arrangements, an officer cannot lend enforcement powers in a partner's EEZ, so cooperation stops at familiarity.
• Capacity constraint: the ICG's roughly 151 ships and 78 aircraft [3] must cover India's vast coastline and EEZ; each long diplomatic voyage costs home patrol days.
• Thinning civilian cover: coast guards are now the principal grey-zone instrument in the East and South China Seas, so such cooperation is non-military but not politically neutral.

On balance, coast guards are the most usable, least escalatory vehicle for Indo-Pacific minilateralism, though currently more symbolic than operational. Converting observers into shipriders, linking the Quad Ports of the Future Partnership to port-state inspection of illegal catch [4], and publishing standardised procedures after each voyage would make MAHASAGAR's promise of security and growth genuinely enforceable.