This presentation introduces a multi-robot system (MRS), a mission-based AI teaming platform for real-world maritime autonomous operations and remote supervision. Instead of building hardware-specific autonomy, MRS provides the missing layer that lets mixed fleets of UxVs work together to complete missions. Using decentralized, real-time AI decision-making and live sensor fusion, autonomous teams adapt to changing conditions and unexpected events. If one UxV (air, surface or subsurface) drops out, the rest automatically replan and continue. MRS integrates with existing systems, improves situational awareness and cuts operator workload significantly – delivering measurable operational efficiency.