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| - The CH252 ranges in weight from about 1.36 kg (size medium) to just over 1.63 kg (extra large). It makes use of the UNSC's MITHRIL armour material which provides increased protection against plasma as well as ballistic weaponry by shattering bullets and disrupting the path of plasma bolts. This is coated with olive-coloured ballistic nylon. It is lighter than the CH127, but is nearly identical in shape to untrained eyes.
- The standard helmet weighs 4 lbs (1.8 kg). When worn with the Marines' body armor, the helmet is typically painted olive drab, though when worn with other body armor models, the helmet is painted to match the body armor. Within the Army, the helmet is generally painted tan, dust gray, or olive drab; medics' helmets feature a caduceus. Air Force pilots' helmets are painted dull brown, similar to those of many Marines. In the Marine Corps, the name of the wearer is sometimes stenciled on the back of the helmet, though this is not always the case.
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| abstract
| - The standard helmet weighs 4 lbs (1.8 kg). When worn with the Marines' body armor, the helmet is typically painted olive drab, though when worn with other body armor models, the helmet is painted to match the body armor. Within the Army, the helmet is generally painted tan, dust gray, or olive drab; medics' helmets feature a caduceus. Air Force pilots' helmets are painted dull brown, similar to those of many Marines. In the Marine Corps, the name of the wearer is sometimes stenciled on the back of the helmet, though this is not always the case. The helmet can be outfitted with a heads-up display eyepiece or ballistic goggles that can be polarized either orange or black, as well as a boom microphone and a tactical flashlight. The helmet can be fitted with an accessory clip which can be used to mount a night vision device. The basic Army configuration of the helmet features a chin strap, though this is typically not worn by Marines. Balaclavas are often worn with the helmet, especially when operating in frigid environments, though they are occasionally worn in temperate and desert climates. UNSC personnel have created several nicknames for the helmet, including "coconut," "lid," "can," and "pasta shell."
- The CH252 ranges in weight from about 1.36 kg (size medium) to just over 1.63 kg (extra large). It makes use of the UNSC's MITHRIL armour material which provides increased protection against plasma as well as ballistic weaponry by shattering bullets and disrupting the path of plasma bolts. This is coated with olive-coloured ballistic nylon. It is lighter than the CH127, but is nearly identical in shape to untrained eyes. A pad system and four-point retention system, similar to the cushions and straps found on bicycle helmets, replaces the nylon cord suspension system, sweatband and chinstrap found on the CH127 helmet. The change provides greater impact protection and comfort for the wearer. The AN/PSQ-310 Night Vision System is integrated into the helmet, and feeds into the helmet's HMD. It can also be fitted with a pair of straps on the rear to keep protective eyewear in place. Its default colour is olive, but cloth helmet covers in varying camouflage patterns are available. Patches displaying rank, unit insignia, and blood type are usually pinned to the side of the helmet. Glasses and other eyewear such as blast goggles can be worn without any discomfort. An armoured "nape pad" that attaches to the CH252's rear suspension system was introduced in mid-2552 and coincided with the introduction of the M52B Body Armour. The goal of the armour insert is to reduce soldier deaths from shrapnel wounds to the neck and lower head. An onboard computer system monitors the user's health via sensors in the helmet and body armour and can be monitored by other squad-mates via TEAMBIO. The helmet means that the user is constantly linked to the UNSC Battle Network, allowing every soldier to call in fire support or request pickup, access information, contact higher authorities, or view data from vehicle and ground sensor networks. The helmet features an integral sensor (often erroneously referred to as a motion sensor) used for tracking enemy forces in environments where the eyes might be obscured, for example, in jungles, cities, and blizzard zones. The sensor makes use of passive electronic sensors that detect the bioelectromagnetism produced by living cells and tissues (it can easily distinguish natural from artificial sources). The helmet is also equipped with a Gunshot Location Detection System, which can detect and locate gunfire via an array of microphones and plot the source on the user's HUD (it can easily distinguish gunfire from similar noises such as fireworks and cars backfiring). A camera system that takes hundreds of thousands of pictures per second and compares them for differences using depth perception and movement software to detect enemies making use of active camouflage, highlighting such targets with an orange corona. Power to the helmet's systems is supplied by six AA batteries that can be recharged on the move by solar cells and a self-winding rotor mechanism in the helmet.
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