It is the only real standard for civilian flight helmets which ensures a high level of protection (shock, retention, noise attenuation and the quality of radio communication).
For a company or a pilot, it is not easy to understand the necessary certifications giving sufficient guarantees of safety with their flight helmets, however, it is the main purpose of wearing a helmet in a helicopter.
"The civil aviation community is void of any guidance on aviation helmet standards."
Manufacturers have always done their best to find within the existing certifications, generally for motorcycle helmets, the best ones which they transposed for the flight helmets in order to guarantee this safety. But at the end, there is no standardization, and it can create confusions for people who are not familiar with the standards. Only the armies have a dedicated test protocol for flight helmets, but with different needs.
The DOI/USFS standard fills this gap and specifies the minimum physical, functional, and performance requirements for a flight helmet on a single document : - Inspections (MIL-STD-1916 or ANSI/ASQ Z1.4.) - Labeling (FMVSS No.218 S5.6.1) - Vision (FMVSS No. 218 S5.4.) - Weight (AFRL-RH-WP-TR-2008-0096) - Impact attenuation testing (ambient, cold, heat) (FMVSS No. 218) - Positional StabilityTesting, Retention System (ASTMF1446 §7.2.1) - Static Strength Testing, Retention System (ambient, cold, heat) ( FMVSS No. 218) - Heat ExposureTesting ( §3.4.2 of MIL-DTL-847474A) - Adhesion of Shell Edge CoveringTesting (§3.5.2 and §3.5.3 of MIL-H-43925D) - Sound Attenuation Testing (ANSI/ASA S12.6) - Communication Equipment Talk-Listen Testing (MIL-DTL-27467B §126.96.36.199 and §188.8.131.52) DOI/USFS standard
In addition to DOI/USFS standard, all our helmets have the following certifications: - Penetration test (ANSI z90.1-1992) - Flame resistance (EN 16471 2014 / EN 16473 2014) - Visors vision (Spherical, astigmatic and prismatic refractive powers: EN 166:2002§ 184.108.40.206.) - Visors resistance (MIL-DTL-43511D§ 3.5.10)