I believe MRA4 ISD is defined as 4 a/c delivered and 6 crews trained to fly them. Given that the first is due to arrive Jan 2010, and subsequent ones at approx 3 monthly intervals, ISD of Dec 2010 is achievable - IF THE AIRCRAFT ACTUALLY ARRIVE ON THE CURRENT PLANNED TIMESCALE!!!
P.S Since approx a third of captains on the fleet are AEOs, will these MACR AEOs be elligible for captaincy, and if not - WHY NOT??????