Javelin,the A300-600 has a vor/loc button.The Fcom states that the vor tracking is for enroute nav only,and has variour other restrictions on speed/intercept etc.In other words it is rubbish!!The A320 was in gestation whilst the A300-600 appeared and obviously the learned men of Toulouse looked at what had come before,realised it was rubbish and binned it.If you have to fly a vor radial use the bird and fly track-then along came the pegasus fmgc and it would do it for you.Maverick what is your interest because on the line you really don't think about it!