Mr. Chair, to your previous statement, the overall acquisition, as we have said at this committee, is about 360. I just want to be clear that the 90 is about the aircraft and the spares. There are other things we're doing. Some of the soft work, sensors and things like we're doing, are all encompassed in there.
We have a road map that we're looking at, such as the immediate upgrades I just talked about. We're looking at some upgrades around IFF, Link-16, and that's across the entire fleet. That is the next wave that will happen. The air force is in option analysis right now to look at what we would do, but also looking at numbers of aircraft.
As you'd well appreciate, it's not the number of aircraft that we're acquiring here; it's hours in a fleet of aircraft that we can consume. As we go forward in anticipating the future fighter—the first delivery will be in 2025—and we look at the follow-on upgrades, it's unlikely to be against all 94 aircraft that we'll now have. That work is under way.
We are replenishing missiles, looking at different areas, and the air force I'd say is in the beginning of that next phase of what they would need to do. At the same time, we execute future fighters and say that at the tipping point at which the fighters will start to deliver, we'll have squadrons of fighters and therefore less of a requirement for the legacy fighters.