the Commands in the Navy allocated are given below. Special operations forces The Special Service Group (Navy) (SSG(N)), colloquially known as the SSGN is an elite unit that conducts unconventional warfare, combat diving, naval interdiction, and asymmetric warfare operations, established under the guidance of the United States Navy's SEALs in 1966. The Navy Special Service Group is headquartered at PNS Iqbal in Karachi where the physical conditioning and weapon tactics training take place. The Navy Special Service Group's specialisation further includes training and mastery in the visit, board, search, and seizure methods, naval interdiction, and security operations to prevent seaborne-based terrorism. The Navy Special Service Group is a tighter unit composed of highly qualified and selected personnel who are modelled on and inspired by the U.S. Navy SEALs training and tradition. The actual number of personnel of Navy Special Service Group is classified and their deployment are also subjected to classified information. In 1970–71, the Navy established the Pakistan Marines to support the amphibious warfare operations and were initially influenced by the United States Marines Corps but the Marines component was decommissioned by the federal government in 1974. On 14 April 1990, the Pakistan Marines were again recommissioned in the Navy with about 2,000 personnel. The advanced training of the Marines are often takes place with the Pakistan Army at their School of Infantry and Tactics in Quetta in Balochistan. The 1st Marines Battalion, the special operation unit, of the Pakistan Marines is specifically trained by the Pakistan Army to conduct infiltration and anti-aircraft warfare operations. The 1st Battalion is currently deployed in Sir Creek. Military philosophy Combat doctrine The military doctrine and philosophy of the Pakistan Navy is primarily directed towards preventing the Indian Navy repeating the 1971 blockade of the Pakistani coasts. From 1947 until 1971, the Pakistan Navy was effectively little more than a coast guard because the Government of Pakistan did not give importance to the strategy of protecting the sea lines of communication. In 1971, the Indian Navy ultimately played a decisive role by enforcing a blockade of Chittagong and Karachi, the only maritime outlets of East Pakistan and West Pakistan respectively. The Navy was unable to break the blockade leading to Pakistan's economic and military resources being severely drained and communication was limited between the two wings of the country. Subsequently, the federal government increased the funding of the Navy. Since 1971 the Navy