Fair point BEXIL. The 42/60 I alluded to in respect ot the Galloway sector is indeed the TSF. We are told that this is set at 80% of the sector capacity. If we could be assured that traffic is evenly presented to us over a given 60 minute period we would be able to handle the sector capacity of 51 without much problem. Of course that doesn't happen, there are always 'clumps' of traffic and also the possibility of something unusual happening like an emergency.