I might handfly the 320 suck-squirt completely raw data if the trip is short (ie
below RVSM) and the FO is a switched on-bloke. This means no AP FD or AT
from eng start to eng SD. If the entire track is following ground navaids I can
solely use them too.
RVSM wise its everything off till 1,000 below RVSM lower level on the way up
then turn it all off again at the RVSM lower level on the way down.
Only time I'd cancel this is OEI esp on TO...at 400ft I'd slowly reinstall these
tools of trade for mutual crew workload alleviation.