Iff / Siff
Here’s another angle to consider. As aircrew, what would you prefer?
(a) to know the (IFF) functionality was definitely not in your aircraft and to have trained for a “work around”, or,
(b) to be told you had the functionality, and trained accordingly, but it turns out it hasn’t been integrated properly and so doesn’t work?
To be fair, you should know the MoD benchmark decision on this precise issue. PE and DPA 2* and 4*, DE&S, plus 4 successive Min(AF) have ruled (b) is acceptable; most recently last month.
What price Duty of Care?