Marine structures are constructions built in or near oceans, seas, or other large bodies of water. They include a variety of facilities such as offshore oil platforms, harbors, docks, and bridges. These structures are designed to withstand harsh marine environments, including strong waves, saltwater corrosion, and extreme weather conditions. The design and construction of marine structures require specialized engineering techniques to ensure safety and durability. Engineers consider factors like water depth, tidal movements, and marine life when planning these projects. Proper maintenance is also crucial to prolong the lifespan of marine structures and protect the surrounding ecosystem.