ISLAMABAD (Online) Pakistan has adopted a comprehensive strategy to increase, upgrade and strengthen its naval fleet to face the challenges of terrorism, piracy and illegal activities at sea. This was stated by Chief of Naval Staff of Pakistan, Admiral Noman Bashir while talking to journalists during the Defence Services Asia (DSA. 2010) exhibition, held in Kuala Lumpur, Malaysia from April 19-21. The Admiral who headed the Pakistan delegation to the DSA-2010 said that as part of a comprehensive strategy, Pakistan navy was in the process of acquiring news ships, increasing its sea surveillance capability, improving and upgrading its submarine operations and strengthening its coastal patrolling capability. The navy has acquired two new F-22 type frigates from China and a third vessel of the same class will be commissioned in two to three months while a fourth one is being built in collaboration with Chinese firms at the Karachi shipyard, Bashir told journalists. Besides, used ships could be acquired with the objective of deploying them in the near future, he said. Pakistan navy was also reinforcing its naval aviation by acquiring long range maritime petrol aircrafts. Two USA build aircrafts had already been acquired, whereas, two more will arrive later. Their commissioning by Pakistan Navy will strengthen its capability to survey large area under its area of responsibility.