Lighthouse is a tower which is built onshore or on the seabed to emit light and serve as an aid to maritime coastal navigation, warning mariners of hazards, establishing their position, and guiding them to their destinations. Among mariners, there is still a natural preference for the reassurance of visual navigation, and lighted marks also have the advantages of simplicity, reliability, and low cost. In addition, they can be used by vessels with no special equipment on board, providing the ultimate backup against the failure of more sophisticated systems. Constrosystems is engaged in lighthouse construction and design in India.