As global air combat operations continue to evolve at a rate not seen for decades, what will the next generation of air-to-air weapons look like, and what missions will they need to fulfil?
With no formal competition under way, industrial partnerships, production capacity and air defence capability could all shape the programme as Denmark considers how to replace its three Iver Huitfeldt-class frigates.
South Korea's air force is seeking to seriously boost its ISR capability with two new fleets of aircraft. This is in addition to a separate AEW&C programme.
The Australian Department of Defence said a new agreement only allows for sharing naval nuclear propulsion information and not the transfer of equipment.