Mumbai Port Trust (also known as the Bombay Port Trust) is a port which lies midway on the West coast of India, on the natural deep-water harbour of Mumbai (Bombay) in Maharashtra. The harbour spread over 400 square kilometres (150 sq mi) is protected by the mainland of Konkan to its east and north and by the island city of Mumbai to its west. The harbour opens to the south to the Arabian Sea. The port is administered by the Mumbai Port Trust (MbPT, formerly the Bombay Port Trust (BPT)), an autonomous corporation wholly owned by the Government of India. The port is primarily used for bulk cargo, while most container traffic is directed to Nhava Sheva port across the harbour.