The city was founded in 1543 and remained in Portuguese hands until 1961, when it became part of India. The 1888 constructed Mormugao Port remains a busy shipping route in Asia. It is one of the major ports of independent India. The ship-building area of Goa Shipyard Limited that builds Navy and Coast Guard vessels was also built here in 1957 (during the Portuguese-era). Initially built around the city's harbour as the barge-repair yard "Estaleiros Navais de Goa," the area has now expanded to include more related activities. The Indian Navy also has a presence in Mormugao, with its vast campuses, which include the naval base INS Hansa that shares control over the Dabolim Airport enclave.