CHARLESTON, S.C. — Naval Information Warfare Center (NIWC) Atlantic will host a routine, pre-planned technology exercise in the Charleston Harbor and on Sullivan’s Island from March 9-12 and March 16-19, 2026 from 9 a.m. to 3 p.m.

This annual event, known as the System of Systems Naval Integration Experiment (SOSNIE), is designed to test and evaluate advanced technologies to enhance naval readiness. This is a long-scheduled annual training exercise and is not in response to any real-world events or current military operations.

Residents and visitors may observe a variety of research and development activities during this period. To increase public awareness and prevent alarm, the community can expect to see:

• Unmanned Systems: Operation of small unmanned aerial systems (drones) and unmanned surface vessels (robotic boats) in the harbor and near the coast.
• Aviation Support: Occasional presence of military helicopters supporting training events.
• Beach Activity: Personnel and temporary equipment staged on Sullivan’s Island. This may include sensor masts, antennas and communications equipment.

For the safety of the public and the integrity of the evaluation, the community is requested to maintain a safe distance and not to approach or interfere with any personnel, equipment, or vessels involved in the exercise.

These routine testing activities are conducted in a manner that ensures public safety and are not expected to interfere with local electronic communications.

NIWC Atlantic is committed to being a responsible steward of the Lowcountry’s public spaces and appreciates the community's understanding and cooperation as it works to develop and field critical capabilities for the nation’s warfighters.