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7 April 2011. Revise photos to show forward infra-red missile warning sensors (IR MWS).

6 April 2011

Marine One Anti-Missile Countermeasures 2


The missile infrared countermeasure (IRCM) systems of Presidential helicopter Marine One model VH-3D shown in the file above (and in the first photo below) have been upgraded to recent protection, apparently based on the Large Aircraft Infrared Countermeasure (LAIRCM) deployed on US forces aircraft, fixed-wing and rotary.

"The DoN LAIRCM system, a variant of the Air Force LAIRCM system, is a defensive system for Marine Corps helicopters designed to defend against surface-to-air infrared missile threats. It combines the derivative AAR-54 two-color infrared Missile Warning Sensor (MWS) with the Guardian Laser Transmitter Assembly (GLTA). The GLTA is equipped with a four-axis, stabilized gimbal system, an AN/AAR-24 Fine Track Sensor, and a ViperTM laser. The MWS detects an oncoming missile threat and sends the information to the system processor which, in turn, notifies the crew through the control interface unit and at the same time directs the GLTA to slew to and begin jamming the threat."

The AN/AAQ-24(V)25, DoN LAIRCM system combines advanced, two-color Infrared Missile Warning System (MWS) and Directed Laser Countermeasures to defeat shoulder-launched missiles fired at. The system will be deployed on a total of 156 United States Marine Corps (USMC) CH-53E, CH-53D and CH-46E medium-lift and heavy-lift, assault support helicopters to meet the USMC urgent needs for a “…state-of-the-art, reliable, carrier-based and land-based Missile Warning System (MWS) and Infrared Countermeasure (IRCM).”

The DoN LAIRCM system consists of five major components: Five Infrared (IR) MWS sensors; a dedicated Central Processor; a Control Indicator Unit (CIU) for cockpit display; two Pointer-Tracker/Jamming Subsystems or Guardian Laser Tracker Assemblies (GLTA) consisting of four-axis stabilized gimbaled system, a Fine Track Sensor (FTS) and a ViperTM laser.


Primary Function: Helicopter Aircraft Survivability
Contractor: Northrop Grumman Corporation
Date Deployed: January 2009
Height: NA
Weight: Total LAIRCM System (2 turret): 196 lbs.

Side-mounted GLTA with IR MSWs at upper left and right

[Image] [Image]
Northrop Grumman's GLTA and Viper

Marine One Anti-Missile Countermeasures 2

IRCM on HMX1 VH-3D in 2003


IRCM in HMX1 VH-3D 22 February 2011

Aft and forward GLTAs and two forward IR MWSs.


HMX1 VH-3D 22 February 2011


HMX1 VH-3D 30 October 2010

Aft and forward GLTAs with aft and forward MWSs.


Aft starboard IR MWS above GLTA


Aft port IR MWS above GLTA

HMX1 VH-3D 28 July 2010

Forward port IR MWS at left, GLTA below right.