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A diver in full gear preparing to enter the water from a boat.     Serene lake at sunset with silhouetted mountains and a pink-purple sky.    A diver inspects underwater structures with equipment and a flashlight.  Underwater view of a submarine or torpedo on the ocean floor.    Clear turquoise water by a rocky coastline with a pier and buildings under a blue sky.    Pier with a crane extending over calm blue sea under clear sky.          Large metal cage suspended over water near a concrete wall.    A crane operating on a floating platform in a river.Crescent Diving & Contracting maintenance  Crescent Diving & Contracting helmetWooden pier extending over clear, greenish water with visible rocks below.