Thanks for the replies.
That was the line I was thinking along, that the effective range from OF had been exceeded and therefore SWN was added.
As I will be filing similar for a trip to Blackpool in the week I would think then my route would be
Swansea DCT SWN DCT WPL DCT WAL DCT Blackpool
and not DCT WPL
Does anyone know whether there is a fixed distance for NDB range within FPLs?
2close