The large, unmanned aerial vehicles can fly nonstop for 24 hours at a range of 4,800 kilometres. The maximum altitude is about 12,000 metres. The ministry has yet to decide on the location for deploying the SeaGuardians. The Maritime SDF conducted test flights of the SeaGuardian between May 2023 and September of this year. The drones have been used by the Japan Coast Guard since 2022.