Winco
Well outside the 10sec rule, I know, but if "contribution" requires you to shoot something down or drop something on it - just remind me, how many ships/subs has the Nimrod sunk since it came into service? By your inference of "contribution" then the Nimrod has never contributed to maritime warfare!
By the way, I believe the MR2 was a cracking bit of kit and it did its job through DETERENCE. The F3 is a similar argument, not a single Coalition aircraft has been lost whilst the F3 has been on CAP whilst EF aircraft have been airborne - QED the DETERENCE worked!
LJ