War. In 1911, the Royal Madras Yacht Club (RMYC), which is based within the Chennai Port premises, was founded by Sir Francis Joseph Edward Spring, the first chairman on the Madras Port Trust who was responsible for Chennai becoming a trading hub, especially during World War II. In 1916, the harbour office building was constructed. From 1905 to 1919, major improvements took place in the port under the stewardship of the visionary Sir Francis Spring. Being an artificial harbour, the port was vulnerable to cyclones and accretion of sand inside the basin due to underwater currents, which reduced the draft. To charter the course of the port development, Spring, who assumed charge as the chief engineer of the port in 1906, drew a long-term plan in a scientific manner to overcome challenges, both artificial and natural. The shifting of the entrance of the port from eastern side to the northeastern side protected the port to a large extent from the natural vulnerabilities. By this time, the port covered an area of 400 acres. By the end of 1920, the port had a dock consisting of four berths in the west quays, one each in the east and south quay along with the transit sheds, warehouses and a marshalling yard to facilitate the transfer of cargo from land to sea and vice versa. In 1929, the Mercantile Marine Department, which was working directly under the Ministry of Shipping till the establishment of the Directorate General of Shipping at Mumbai in 1949, was established to implement the first SOLAS and Load Line conventions. Additional berths were added in the 1940s with a berth at south quay and another between WQ2 and WQ3. The year 1946 saw the establishment of the Port Health Organisation. In 1947, when India gained independence, Chennai became the capital of the Madras State, renamed as Tamil Nadu in 1969. Post-Independence Post-Independence, the development of the port gained momentum. In 1959, a passenger station on the first floor of the transit shed at north quay was commissioned. In 1961, construction of signal station at north quay was completed. In the same year, the port's Jawahar Dock was inaugurated by the then prime minister of India, Lal Bahadur Shastri. In 1964, the Jawahar dock with capacity to berth 6 vessels to handle dry bulk cargoes such as coal, iron ore, fertiliser and non-hazardous liquid cargoes was created on the southern