Tolerances on the ILS
Thought this would be the best place to post this question.
I hold an FAA IR and I am intending to convert in the future to the JAA IR via the 15 hours, etc route. I understand that the ILS is required to be flown to 1/2 scale deflection rather as in the FAA test where you can carry on as long as you don't go full scale.
Whilst I don't have a problem flying it 1/2 FSD my question was what is the thinking behind this? As long as you dont peg the needles then you are maintaining your situational awareness on the loc/GS and therefore be able to carry on - once you peg it then you have lost it! The only thing I could think of was it makes sure that you are in a more stabalised approach down the ILS.
I would be interested in views or the 'offical' answer if anyone knows it.