during the first war with India in 1947–48 as all the fighting was restricted to land and aerial combat missions. On operational planning, Captain HMS Choudri had engaged on commanding a former RIN destroyer from Karachi to Bombay to oversee the evacuation of Indian emigrants to Pakistan. In 1948, the Royal Pakistan Navy had to engage in humanitarian missions to evacuate Indian immigrants trapped in disputed and hostile areas, with its frigates operating continuously. Command and control of the new Navy was extremely difficult as Prime Minister Liaquat Ali Khan's administration had to extend the employment of large number of the Royal Navy officers from the British Admiralty with Rear admiral James Wilfred Jefford appointed as the Flag Officer Commanding (FOC) who worked on creating the contingency plan, "Short-term Emergency Plan (STEP)", to work up the frigates and naval defences in case of escalation of the war at sea. In 1948, the Directorate-General for the Naval Intelligence (DGNI), a staff corps, was established under Lieutenant S. M. Ahsan, who served as its first Director-General, in Karachi. When the first war came to an end in 1948, the Navy temporarily established its Navy NHQ in Karachi and acquired its first O-class destroyer from the transfer by the Royal Navy. The Royal Pakistan Navy greatly depended on the generous donations from the British Royal Navy with two s, and . Tippu Sultan was commissioned on 30 September 1949, under Commander P.S. Evans, whilst Tariq was placed under the command of Lieutenant-Commander A. R. Khan. The two destroyers formed the 25th Destroyer Squadron, as PNS Jhelum and PNS Tughril, under Commander Muzaffar Hasan, also joined the Royal Pakistan Navy. In 1950, the Navy's nationalisation took place when many officers from the air force and army volunteered to join the navy and NCOs gaining commission as an officers. Support from the army and air force to the navy led to the establishment of logistics and maintenance machinery with vigorous efforts directed towards integrating the navy presence in East Pakistan, thereby creating opportunities for people in East Pakistan to participate in the build-up. In 1951, the Pakistan government called for appointing native chiefs of the armed forces, but it was not until 1953 that a native navy chief was appointed. The British Admiralty, however, maintained the command of the Navy through Rear-Admiral Jefford who had native deputy chiefs of staff including Commodore HMS Choudhri, Commodore