a barricade and a sign on the helideck of a construction work barge

asia authorised background barge barricade bridge chain cloud cloudy complex construction crane dawn diesel driling energy engineering entry environment environmental exploration field flare fossil fuel gas gasoline handrail helideck helipad horizon hydrocarbon industrial industry installation job light link malaysia metal net night occupation ocean offshore oil oilfield oilrig only personnel petroleum platform power production project rig safety sea sign signage sky steel structure sunrise sunset technology terengganu tower upstream warning water wave weather work