The maritime history of India dates back to 6,000 years with the birth of art of the navigation and navigating during the Indus Valley Civilisation.[12] A Kutch mariner's log book from 19th century recorded that the first tidal dock India has been built at Lothal around 2300 BC during the Indus Valley Civilisation, near the present day harbour of Mangrol on the Gujarat coast. The Rig Veda, credits Varuna, the Hindu god of water and the celestial ocean,[13] with knowledge of the ocean routes and describes the use of ships having hundred oars in the naval expeditions by Indians.