Originally Posted by
Gardyloo
No, because SA would be the country of origin and you can't depart the country of origin twice -
Probably, notation problem.
As 747-444 wrote
Can I buy my ticket in SA and start with a 'surface sector'. As in JNB-MRU (surface sector) and make my first flight BA MRU-JNB?
OP's intetion is probably,
JNB//MRU-JNB-LHR-...
Because of JNB//MRU isn't a flight sector, it doesn't DEPART.
So it may sutisfies one international depature from the country of origin.
If XXX//YYY can be treated as a flight segment,
can we do
NRT//HKG-JFK-LHR-HKG-NRT with ex-JPN fare ?
Whole positioning flight problem could be solved
ROUTING rule says
Intermediate surface sector are permitted at the passenger's expense
So, INTERMEDIATE surface sectors only. Maybe.