Brazilian Offshore Ops.
I 've been flying in the Brazilian offshore area since 3 years ago and there're over than 90 oil rigs which just 4 have an intrument approach and what we use to do is make the procedure for these rigs and when reach VMC we continue the flight for the nearst non controled rig at low altitute such as 500 ft or 1000 .
The whole Bacia de Campos ( biggest offshore area ) has ATC services incluinding ADS-B system to providing surveillance.
I heard that there's the same system already working in gulf of mexico , is it true ?