Washington: The United States is all set to deliver six Phalanx anti-ship missiles, worth $155 million, to Pakistan in addition to the Orion surveillance aircraft and anti-tank missiles it has agreed to sell under a 'Foreign Military Sale'.

The Pentagon has notified the US Congress about the proposed sale, which include Phalanx Close-In Weapon Systems (CIWS), upgrade of six Phalanx CIWS Block 0 to Block 1B, as well as associated equipment and services to Pakistan, a Defence Ministry statement said.

Pakistan had requested for six Phalanx rapid-fire 20-millimetre guns for surface ships, and the upgrade of six additional gun systems, spare and repair parts, modification kits, supply and support equipment and publications and technical data.

The Pentagon had already notified the Congress of three proposed major defence deals with Pakistan, worth $1.2 billion, under which it will give Islamabad eight P-3C Orion surveillance aircraft for its Navy, 2000 TOW-2A missiles and 14 TOW 2A Fly-to-Buy missiles.

"The proposed sale will contribute to the foreign policy and national security of the United States by helping to improve the security of a friendly country that continues to be a key ally in the global war on terrorism," the Pentagon said about the Phalanx deal.

The US, however, tried to allay fears of a military disparity in the subcontinent saying, "The proposed sale of this equipment and support will not affect the basic military balance in the region."