Boeing Awarded $3.1 Billion in U.S. Navy Contracts for Harpoon, SLAM ER Cruise Missile Systems

Boeing has been awarded a combined $3.1 billion in contracts by the U.S. Navy’s Naval Air Systems Command (NAVAIR) for Harpoon and Standoff Land Attack Missile Expanded Response (SLAM ER) weapon systems in support of Foreign Military Sales (FMS).

About $2.6 billion of that was contracted on May 14 while the remainder had been previously awarded.

The SLAM ER contract, worth around $1.97 billion, is to provide non-recurring engineering associated with obsolescence redesign effort as well as the production and delivery of 650 missiles in support of the government of Saudi Arabia.

The Harpoon contract, worth around $656.98 million, procures and delivers 467 Harpoon full-rate production Lot 91 Block II missiles and support equipment. This contract modification procures four Block II missiles and support equipment for the government of Brazil, eight Block II missiles and support equipment for the government of Thailand, 53 Block II missiles and support equipment for the government of Qatar, 402 Block II missiles and support equipment for the government of Saudi Arabia, and support equipment for the governments of Japan, the Netherlands, India and South Korea.

“We are pleased to continue our long legacy of partnering with the Navy to build weapons that defend America and its international partners,” said Cindy Gruensfelder, vice president, Boeing Weapons. “These awards will not only extend production of the Harpoon program through 2026, they will also restart the production line for SLAM ER and ensure deliveries through 2028.”

Boeing last delivered the SLAM ER weapon system in 2008. In October 2019, Boeing began construction on a new 35,000 sq. ft. manufacturing facility to support increased production for the Harpoon and SLAM ER programs. Construction is expected to be complete in 2021.

Harpoon Block II

Harpoon Block II is an all-weather over-the-horizon, anti-ship missile (ASHM) manufactured by Boeing Defence, Space & Security. It is one of the world’s most advanced anti-ship missiles capable of performing both land-strike and anti-ship missions.

Harpoon Block II
Harpoon Block II missile. (Boeing illustration)

There are variants of the Harpoon missile that can be launched from aerial platforms, surface ships, submarines, and coastal defense batteries. Unlike other variants, the air-launched version (AGM-84) is not equipped with a solid-fuel rocket booster.


AGM-84H/K SLAM-ER (Standoff Land Attack Missile-Expanded Response) is a precision-guided, air-launched cruise missile produced by Boeing Defense, Space & Security for the U.S. Armed Forces and their allies.

AGM-84H Standoff Land Attack Missile-Expanded Response (SLAM-ER)
AGM-84H Standoff Land Attack Missile-Expanded Response (SLAM-ER)

Developed from the AGM-84E SLAM (Standoff Land Attack Missile) (itself developed by Boeing Integrated Defense Systems from the McDonnell Douglas Harpoon antiship missile), the SLAM-ER is capable of attacking land and sea targets at short-to-medium-ranges (155 nautical miles/270 km maximum).

The SLAM-ER relies on the Global Positioning System (GPS) and infrared imaging for its navigation and control, and it can strike both moving and stationary targets. The missile can be remotely controlled while in flight and it can be redirected to another target after launch if the original target has already been destroyed, or is no longer considered to be dangerous (command guidance).

The SLAM-ER is a very accurate weapon and had one of the best circular error probable (CEP) of any missile used by the U.S. Navy.

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