I am going to have to turn to Nicholas for some of the additional details.
When we looked at the satellites in this audit, it was around whether or not the government had the capabilities to gather the maritime domain awareness. What we found was that the satellites were not meeting the current needs. If a priority request came up, another request was bumped down on the list. We did highlight the aging and, as you mentioned, the length of time to replace these.
What we're looking for is for the government to have a bit of a contingency plan. What will happen should these satellites reach the end of their useful lives? Right now, the government either buys information commercially or turns to its allies. We encourage it to have a bit of a contingency plan in addition to doing that.
If you want more details, maybe Mr. Swales could provide that.