A320 Minimum approach speed
A quick question from a humble PPL:
On listening to the RT this morning, there was an aircraft cleared for immediate take off. Behind was a BA A320 which was told to fly minimum approach speed in order to give the departing aircraft a bit more slack. At this time the A320 was probably around 4 miles out.
Would the crew or FMC have not already worked out the optimum approach speed for their weight / configuration? If so would they have this minimum approach speed handy? i.e could they call it up on the FMC, or would it be a %age lower than original approach speed?