If Petrobras were focussed on safety and thought C/As were a good thing then they would feature on all types but they don't. Conclusion - Petrobras want to maximise payload and therefore have to carry a C/A because max payload equals more than 19 pax.
It's been my experience that you would be pushed to find the Brazilian offshore helicopter industry leading in any aspect of flight operations. For example, it is, as far as I know, the only major offshore helicopter centre that has ignored the benefit of underwater escape training so anyone focussing on passenger safety should be worried about that. There is a state of the art HUET centre in Macae and more than 45,000 offshore workers who have been persuaded that they don't need it.
G.
