The Advanced Bomb Suit (ABS) is a full body ensemble that protects the Explosive Ordnance Disposal

Bomb disposal

Bomb disposal is the process by which hazardous explosive devices are rendered safe. Bomb disposal is an all encompassing term to describe the separate, but interrelated functions in the following fields:*Military:...

 (EOD) soldier from threats associated with IEDs

Improvised explosive device

An improvised explosive device , also known as a roadside bomb, is a homemade bomb constructed and deployed in ways other than in conventional military action...

, including those related to fragmentation, blast overpressure, impact, heat, and flame. The ABS uses new material technology and design to improve protection, comfort, and ergonomics. The suit is constructed from Kevlar

Kevlar

Kevlar is the registered trademark for a para-aramid synthetic fiber, related to other aramids such as Nomex and Technora. Developed at DuPont in 1965, this high strength material was first commercially used in the early 1970s as a replacement for steel in racing tires...

 with an outer anti-static cover of 50/50 Nomex/Kevlar and comprises a jacket, crotchless trousers, groin cup, and rigid ballistic panels. To minimize weight and maximize flexibility, protection is provided at various levels, specific to body regions, based on susceptibility to wounds.

Helmet

The helmet, which offers protection against fragments with velocities of over 683 m/s, is made of a lightweight, high strength, fibre and weighs only 3.6 kg with visor (2.7 kg without visor). The ergonomic design allows ease of movement and good visibility without neck strain. The visors' fully laminated acrylic

Acrylic

Acrylic may refer to:Chemicals and materials:* Chemical compounds that contain the acryl group derived from acrylic acid* Acrylic fiber, a synthetic polymer fiber that contains at least 85% acrylonitrile...

 and polycarbonate

Polycarbonate

PolycarbonatePhysical PropertiesDensity 1.20–1.22 g/cm3Abbe number 34.0Refractive index 1.584–1.586FlammabilityV0-V2Limiting oxygen index25–27%Water absorption – Equilibrium0.16–0.35%Water absorption – over 24 hours0.1%...

construction increases its margin of safety against multiple fragment hits. The visor provides clear undistorted vision and is also removable. The helmet incorporates MIL-SPEC microphone and speakers and a forced air ventilation system. The battery pack provides up to 5 hours of continuous operation of the ventilation system and uses standard 9V batteries. All wiring in both the suit and the helmet, controlling the ventilation system, is incorporated within the suit itself to eliminate the danger of snagging.

Communication Systems

Two systems are available which are compatible with the speakers and microphone fitted to the helmet, as standard.

• The hardwire system is a compact unit and can be used with most standard reels of two wire firing cable without causing distortion. It is supplied with a headset and microphone for use by a second party and avoids the need for a 'push to talk' type system.
• A full duplex, wireless system is also available that features a very low level of RF radiation in transmission, to minimise the risk of activating IEDs at the device, and a very sensitive receiver ensuring that the second party can always be heard.

The user has the option of switching off the transmitter when he reaches a device while still being able to receive incoming signals. The user can also hear his own voice at a reduced level so that he is conscious of the signal being received by the second party. Both systems operate from standard 9v rechargeable batteries.

Cooling system

• For use in hot environments an optional cooling system is available. This is worn under the suit and consists of a Nomex body suit with a capillary tube network stitched into it. This is connected to a 2 litre water reservoir and pump that circulates ice water around the body. The cooling rate is adjustable so that a comfortable working temperature can be maintained.

Fragmentation

• The greatest threat to the IED technician arises from fragments emitted from the bomb and other objects in the surrounding area which can enter the body at supersonic speeds. The lightweight, removable, composite ballistic panels fitted to the suit protect the upper torso, shoulders, neck, arms and legs while maintaining lightness and maneuverability. In addition, the suit is supplied with rigid ballistic panels to provide added protection to the chest, lower abdomen and groin areas. These have been tested at speeds of up to 1667 m/s.

Heat

• The outer material is constructed from flame retardant Nomex/Kevlar mix which protects the user against burns.

Overpressure

• The pressure wave from a blast can cause severe damage to the lungs, eardrums and cause trauma in other body areas. The design of the suit is such that both sets of ballistic panels limit the effects of the overpressure on the body while the collar completely encloses the neck area and overlaps the helmet.

Impact

• The impact of the blast on the body can cause differential acceleration between the head and torso which can break the neck and cause damage to the spine. The suit is fitted with an articulated spine protector while the raised suit collar overlapping the helmet limits the differential acceleration between body and head.