signage at the stair onboard a construction work barge

ascending barge blue boat cloud cloudy construction crude day descending down drilling energy engineering environment exploration field fossil fuel gas handrail heading helideck horizon hydrocarbon industrial industry installation marine maritime morning nautical occupation ocean offshore oil oilfield oilrig onboard operation petroleum platforms posted power production project reminder rig safety scenery sea ship signage sky stair step terengganu tidal tide upstream vessel wave weather wind work