Forgive me but this seems to be a SAR contract based in Broome. If HNZ had the crews living in Broome & not touring, then it would be on fixed based conditions & not touring. This is what Lloyds did in Karratha where the company provided housing & the crews had normal annual leave & a 5 day week.
If they flew to the oil rig as usual, then it is still a fixed base situation.