3rd engineer Captain / Master / OIM / Barge Master Chief engineer / TSL / ATSL Chief Mate / Chief officer / SDPO / MSL Crane operator / Deck pusher Derrickman / Derrickhand Driller Electrician ERO / 2nd engineer ET Full crew Full rig crew Oiler / Motorman / Pumpman / Welder Radio Operator Rigger / Roustabout / Roughneck SDPO / DPO / ADPO Subsea engineer