Boeing to provide kits to convert anti-submarine torpedoes into high-altitude long-range glide weapons

June 23, 2023
As the glide weapon for anti-submarine warfare (ASW) nears the water, it jettisons its wings and tail and takes on its role as a smart torpedo.

WASHINGTON – Airborne weapons experts at the Boeing Co. are building launch equipment for flying torpedoes that can enable U.S. Navy aircraft to attack submerged enemy submarines from long ranges at high altitudes.

Officials of the Naval Sea Systems Command in Washington announced a $12 million contract last week to the Boeing Co. Defense, Space & Security segment in St. Louis for High Altitude Anti-Submarine Warfare (ASW) Weapon Capability (HAAWC) Air Launch Accessory (ALA) equipment, as well as production, engineering, and hardware support.

The HAAWC ALA enables the Raytheon MK 54 lightweight torpedo carried aboard the Navy Boeing P-8A Poseidon long-range maritime patrol jet to glide through the air from altitudes as high as 30,000 feet -- essentially transforming the torpedo into a glide weapon that can attack enemy submerged submarines from long ranges.

As the flying torpedo for anti-submarine warfare (ASW) nears the water, it jettisons its wings and tail and takes on its original role as a smart torpedo that can detect, track, and attack enemy submarines autonomously.

Related: Add-on kits create flying torpedoes for P-8A Poseidon to attack enemy submarines from high altitudes

After shedding its control surfaces, the HAAWC ALA activates a parachute that lowers the torpedo into the water to begin its run toward the target. When launched from 30,000 feet the HAAWC-equipped MK 54 torpedo will glide for seven to 10 minutes before entering the water.

While in flight the HAAWC glide weapons are completely self-contained. The ALA includes a flight-control computer, a GPS-based navigation system, and power sources.

The MK 54 always has been launchable from aircraft, but before the HAAWC ALA, crews of anti-submarine fixed-wing aircraft and helicopters had to release the torpedo from altitudes no higher than about 100 feet.

Related: Raytheon to provide parts kits to upgrade signal processing and sonar for Navy MK 54 lightweight torpedo

The HAAWC will enable the P-8A aircraft -- a modified Boeing 737-800ERX passenger jetliner -- to maintain optimum surveillance altitudes without wasting time and fuel to drop to low altitudes and then 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 to launch anti-submarine weapons outside the ranges of shore-based anti-aircraft defenses.

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

Related: Boeing to equip Navy's new P-8A Poseidon maritime patrol aircraft for high-altitude ASW

The Boeing HAAWC ALA for the MK 54 torpedo consists of wings designed originally for the Boeing AGM-84H/K Standoff Land Attack Missile-Expanded Response (SLAM-ER). The ALA tail assembly includes the guidance kit designed originally for the Joint Direct-Attack Munition (JDAM), which contains a GPS navigation system. Boeing also is fitting the HAAWC with a data link to transmit target position updates while in flight.

On this order Boeing will do the work on this contract in St. Charles, Joplin, St. Louis, Joplin, and Piedmont, Mo.; Salt Lake City; Minneapolis; Orlando, Fla.; Cedar Rapids, Iowa; Chandler, Ariz.; Berea, Ohio; Wichita, Kan.; Albuquerque, N.M.; Lexington, Ky.; and Chatsworth, Calif., and should be finished by December 2025.

For more information contact Boeing Defense, Space & Security online at, or Naval Sea Systems Command at

About the Author

John Keller | Editor-in-Chief

John Keller is the Editor-in-Chief, Military & Aerospace Electronics Magazine--provides extensive coverage and analysis of enabling electronics and optoelectronic technologies in military, space and commercial aviation applications. John has been a member of the Military & Aerospace Electronics staff since 1989 and chief editor since 1995.

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