Boeing flying torpedoes to attack enemy submarines from 30,000 feet

WASHINGTON-Airborne weapons experts at the Boeing Co. got the go-ahead last month to start building add-on kits for the U.S. Navy Mark 54 lightweight torpedo that will enable the weapon to glide through the air from altitudes as high as 30,000 feet and enable the Boeing P-8A Poseidon maritime patrol jet to attack enemy submarines from long ranges.

The Naval Sea Systems Command in Washington awarded a $19.2 million contract to the Boeing Co. Defense, Space & Security segment in St. Charles, Mo., to design and build the High Altitude Anti-Submarine Warfare Weapon Capability (HAAWC) Air Launch Accessory (ALA). The HAAWC ALA turns the Raytheon Mark 54 torpedo into a glide weapon that the Boeing P-8A Poseidon maritime patrol aircraft can release from high altitudes.

As the flying torpedo reaches the water, it jettisons its wings and other air-control surfaces and takes on its original role as a smart torpedo to detect, track, and attack enemy submarines on its own.

The Mark 54 always has been able to launch from aircraft, but before the HAAWC add-on kit air crews had to release the torpedo from altitudes no higher than about 100 feet above the ocean's surface.

Boeing will design a wing kit to enable aircraft to launch torpedoes from 30,000 feet.
Boeing will design a wing kit to enable aircraft to launch torpedoes from 30,000 feet.

The HAAWC will enable the P-8A aircraft-a Boeing 737 passenger jetliner modified for anti- submarine warfare (ASW)-to maintain high surveillance altitudes without wasting the time and fuel necessary to drop to low altitudes to attack targets and then climb back to high patrol altitudes.

Attacking from high altitudes also enables the P-8A to reduce the time between target acquisition and attack, as well as launch anti-submarine weapons outside the ranges of shore-based, anti-aircraft defenses.

When launched from 30,000 feet, the HAAWC-equipped Mark 54 torpedo will glide for seven to 10 minutes before shedding its wings and entering the water.

While in flight, the HAAWC will be completely self-contained. The HAAWC adaptor kit includes a flight control computer, a GPS-based navigation system, and power sources. When near the water, the system sheds its wings and activates a parachute that lowers the torpedo to the water to begin its run toward the target.

Boeing will build an add-on kit that requires little or no modifications to the Mark 54 torpedo or to the P-8A aircraft. Boeing's HAAWC contract includes options that could bring the value of the program to as much as $47 million.

Coincidentally, Boeing handed over the seventh production P-8A Poseidon to the Navy on schedule March 29, marking the first delivery from the second low-rate initial production contract awarded in November 2011. The P-8 is scheduled to replace the Lockheed Martin P-3 Orion four-engine turboprop maritime patrol plane.

The Mk 54 is an all-digital, lightweight torpedo that has advanced software algorithms from the larger submarine-launched Mark 48 torpedo.

Boeing engineers reportedly will fit the Mark 54 torpedo with the wings designed for a Standoff Land-Attack Missile-Expanded Response cruise missile to enable to torpedo to glide to the ocean's surface. The HAAWC tail assembly is to include the guidance kit designed for the Joint Direct-Attack Munition (JDAM), which contains a GPS navigation system.

Boeing also could fit the HAAWC with a data link to transmit target position updates while in flight. Boeing will do the work on this contract in St. Charles, Mo., and should be finished by April 2016.

FOR MORE INFORMATION contact Boeing Defense, Space & Security online at, and Naval Sea Systems Command at

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Mil & Aero Magazine

April 2015
Volume 26, Issue 4

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