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It's only fitting.


Word from the battlegrounds of Iraq and Afghanistan is that some soldiers are not wearing the new Advanced Combat Helmet A combat helmet is a helmet designed specifically for use during combat. Helmets are among the oldest forms of personal protective equipment, and are known to have been worn by ancient Greeks and Romans, throughout the Middle Ages, and up to the end of the 1600s by many combatants.  (ACH) correctly. Others are wearing an ACH that fits poorly.

These problems stem from any number of reasons:

* A misunderstanding of how the ACH should be worn

* Poor pad placement

* Wrong shell size

* Wrong pad size

* Choosing the shell size of the ACH based on the shell size of the soldier's previously issued PASGT PASGT Personnel Armor System for Ground Troops (US DoD)  helmet.

Proper helmet size, fit and stability are critical to your mission and safety. If the ACH sits too low on the head, it interferes with your eyewear and field of vision. If it rides too high, you increase your risk of getting wounded by fragmentation from an IED Noun 1. IED - an explosive device that is improvised
I.E.D., improvised explosive device

explosive device - device that bursts with sudden violence from internal energy
 or a mine. And if ifrs loose and unstable, it's a constant bother and a handicap.

If ACH sits too low, you can't see well

[ILLUSTRATION OMITTED]

If it rides too high, you increase your risk

[ILLUSTRATION OMITTED]

So before you move out on your next mission, get acquainted with these ACH sizing and fitting guidelines:

Shell Sizing

THE FIRST STEP TO A GOOD FIT IS TO CHOOSE THE RIGHT SHELL SIZE.

START BY HAVING SOMEONE MEASURE YOUR HEAD--LENGTH, WIDTH AND CIRCUMFERENCE.

[ILLUSTRATION OMITTED]

Length and width are best measured with a caliper caliper

Instrument that consists of two adjustable legs or jaws for measuring the dimensions of material parts. Spring calipers have an adjusting screw and nut; firm-joint calipers use friction at the joint to hold the legs unmoving.
, NSN NSN National Stock Number
NSN Nokia Siemens Networks
NSN National Storytelling Network
NSN NATO Stock Number
NSN New Substances Notification (CEPA)
NSN National Student Number (NZ)
NSN Never Say Never
 5210-01-434-9493.

* Length. Put one leg of the caliper on the forehead between the eyebrow ridges. Put the other leg on the back of the head. Slide the caliper up and down the midline mid·line
n.
A medial line, especially the medial line or plane of the body.


midline,
n the line equidistant from bilateral features of the head.
 of the head until you find the greatest length.

* Width. Put one caliper leg on each side of the head and measure the greatest width.

To measure circumference, you must use a measuring tape, NSN 8315-00-782-3520.

* Circumference. Wrap the measuring tape around the head just above the eyebrows and above both ears. Pull the tape snug for accuracy.

After measuring the head, use the chart below to choose the right shell size based on where the three measurements fall. Select the shell size as determined by the largest single measurement. For example, suppose a soldier's head has these dimensions:

Circumference: 21 1/2

Width: 6 1/4

Length: 8 1/2

His measurements would fall in the highlighted areas of the chart.

An 8 1/2-in head length would override any other measurement and would call for him to wear an extra-large shell.

If any measurement falls on the dividing line Noun 1. dividing line - a conceptual separation or distinction; "there is a narrow line between sanity and insanity"
demarcation, contrast, line

differentiation, distinction - a discrimination between things as different and distinct; "it is necessary to
 between sizes--for example, 22 1/2 inches--always select the larger size.
Head/Shell Sizing Chart

                       Head               Head              Head
                      Length             Width         Circumference

Medium         Up to 7 3/4 inches     Up to          Up to 22 1/2
Helmet Shell     (198 mm)             6 1/2 inches     inches (573 mm)
                                      (162 mm)
Large          From 7 3/4 inches                     From 22 1/2 inches
Helmet Shell     (198 mm)                              (573 mm) up to
                 up to 8 1/4 inches                    23 1/2 inches
                 (210 mm)                              (597 mm)
Extra-Large    From 8 1/4 inches      6 1/2 inches   23 1/2 inches
Helmet Shell     (210mm)              (162 mm)         (597 mm)
                 and over             and over         and over


Pad Sizing

The second step to a good fit is to choose the right pad size. Each helmet comes with a set of seven 3/4-in thick suspension pads. The 3/4-in pads are also known as size 6. One-inch thick pads (also known as size 8) are available through requisition A written demand; a formal request or requirement. The formal demand by one government upon another, or by the governor of one state upon the governor of another state, of the surrender of a fugitive from justice. The taking or seizure of property by government.  and in spare parts Spare parts, also referred to as Service Parts is a term used to indicate extra parts available and in proximity to the mechanical item, such as a automobile, boat, engine, for which they might be used.

Spare parts are also called “spares.
 kits given to units. Each set includes one circular crown pad, two trapezoidal pads and four oblong/oval pads.

The only way to determine the right pad size is to try on the helmet with the pads in it. When you first try it on, wear the standard pad configuration. That includes all seven size 6 pads placed inside the helmet like so:

* crown pad in the center of the helmet

* one trapezoidal pad in the front, another in the back

* an oblong/oval pad on each side of the trapezoidal pads

If you plan to wear other equipment with the helmet, such as a headset Headphones combined with a microphone. Used in call centers and by people in telephone-intensive jobs, headsets provide the equivalent functionality of a telephone handset with hands-free operation. Many people use headsets at the computer so they can converse and type comfortably.  and microphone, make sure you wear them when you size the helmet.

Tighten the four-point chin strap to see how the helmet and pads fit. Here's how to tell if you have a good fit:

* The ACH is snug but not too tight.

* The crown pad touches the top of the head.

* Look up with your eyes only Eyes only may refer to:
  • Eyes only Dark Angel TV series character
  • Classified information
. You should just see the rim of the ACH. If you can't see the rim, the helmet sits too high.

* Shake your head tip and down and from side to side. The helmet should remain stable.

Ask a buddy to look at how your helmet fits. Here's what he should look for:

* Viewed from the front, both sides of the ACH should be level.

* Viewed from the side, the front and back should be level.

* The bottom of the ACH should come to the top of the ear canal ear canal
n.
The narrow, tubelike passage through which sound enters the ear. Also called external auditory canal.
 opening.

* The front rim should rest about 1/2 inch above the eyebrows.

* The helmet sits too low on the head. It gets in the way of eyewear and blocks your held of vision.

* It rides high on the head, exposing too much of your forehead and ears.

* Crown pad does not touch your head.

* Helmet fits loosely. It bounces or rotates when you shake your head.

If you don't get the fit or comfort you want, try replacing the pad set with a different size. You can also try these other pad configurations:

* Change the position of the oval/oblong pads from vertical to horizontal or diagonal.

* Remove tip to two oval/oblong or trapezoidal pads. The crown pad must always remain in the helmet.

Over time, the pads compress and you may need to tighten the four-point chin strap to get a good fit.

During high-risk operations such as airborne, air assault, rappelling or mountaineering mountaineering
 or mountain climbing

Sport of attaining, or attempting to attain, high points in mountainous regions, mainly for the joy of the climb.
, you must wear the seven-pad configuration, it offers the most impact protection. You must also use the pads to cover the hardware inside the helmet.

TO LEARN MORE ABOUT SIZING AND FITTING THE ACH, GO TO THESE ONLINE SOURCES ...

https://peosoldier.army.mil

* Safety of Use Message (SOUM SOUM Safety of Use Message (US Army) ), TACOM TACOM Tank-Automotive and Armaments Command (US Army)
TACOM Tactical Communications
TACOM Tactical Command
TACOM Tank-Automotive and Armament Command
TACOM Theater Army Command
TACOM Tactical Army Command
TACOM Tactical Army COM
 SOUM 05-006, Inspect soldier fit and wear of ground combat helmets

* A video showing the correct sizing and fitting procedures

* TM 10-8470-204-10, Operator's Manual for Advanced Combat Helmet (ACH)

* Graphic Training Aid GTA GTA Grand Theft Auto (legal)
GTA Grand Theft Auto (video game)
GTA Greater Toronto Area (Canada)
GTA Graduate Teaching Assistant
 07-08-001, ACH and PASGT Proper Wear and Adjustment
COPYRIGHT 2006 PS Magazine
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2006, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Title Annotation:Advanced Combat Helmet ...
Publication:PS, the Preventive Maintenance Monthly
Geographic Code:1USA
Date:May 1, 2006
Words:1064
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