P1
INTEGRATION OVER ATTACHMENT
Vision, comms, strobes, cameras and respirator are built in, not bolted on. Less snag, less profile, less signature, and easier to service.
P2
AWARENESS WITHOUT OVERLOAD
A clear-visor, optical see-through system. The HUD is glanceable and peripheral; it never dominates vision. Natural sight is always primary.
P3
SIGNATURE DISCIPLINE
Electronic, thermal and acoustic signature engineered down across every subsystem. No active emitters in the helmet.
SYS·02HUD VIEW · AMBER SYMBOLOGYGLANCEABLE · PERIPHERAL · PROFILE-DRIVENACTIVE
ROLE PROFILE4 SETS
SYMBOLOGY SET · RIFLEMAN
HEADING TAPEON
SQUAD4 UP
LINKA-NET
MODEPATROL
WAYPOINTWP-04 · RV
CAUTIONNONE
The display sits below the natural sight line and never dominates vision. The clear visor is always primary; symbology is glanceable, not a wall of graphics.
SYS·00SUBSYSTEM REGISTRY · MFDPRESS A SOFTKEY TO SELECT A PAGEACTIVE
PAGE 01 / 11 · VISION
SELECTED DIFFERENTIATOR
SYS·07 · FD-SIG PRIMARY DIFFERENTIATOR
SIGNATURE IS
WHERE IT'S
WON OR LOST.
Survivability begins with not being detected. SENTINEL engineers its electronic, thermal and acoustic signature down across every subsystem, not a coating bolted on at the end, but a constraint the architecture is built around. Select an axis and read the helmet against a conventional stack.
SENTINEL HMD-1MANAGED
VERDICT0 EMITTERS · UNDETECTED
LEGACY STACKDETECTED
VERDICT4 EMITTERS · DETECTED
VS
ELECTRONIC
No active RF emitters in the helmet.
›All radios, GPS and data links live in the backpack.
›Identification by passive IR-reflective markers, optional, not baseline.
›Optional user-triggered coded IR beacon.
SYS·04/05/06AIRFLOW + POWER · SYSTEMS SCHEMATICONE AIRFLOW · TWO PROBLEMS · 24 V SHARED BUSACTIVE
THE AIR THAT YOU
BREATHE ALSO COOLS YOUR HEAD.
A pack blower pushes filtered air into the sealed helmet. Flow ramps with breathing demand, so exertion doesn't starve the operator, and the same stream sweeps the visor (anti-fog) and the head (cooling). Drive exertion up; fit the CBRN collar to pressurise.
EXERTION · BREATHING DEMANDDEMD
ADAPTIVE FLOW DEMAND45/100
CBRN COLLAR · SEALED MODESEAL
CBRN
ONOFF
LIFT GUARDLift the guard and seal to route air through the twin filters at positive pressure. Removed, the helmet is a clean, lighter vent-mode baseline.
FLOW
112L/min
DEMAND-RAMPED
HELMET PRESS
0Pa
AMBIENT
FAN NOISE
10.3dB(A)
BELOW BREATHING
CO₂ IN MASK
1047ppm
FLUSHED BY FLOW
24 V RAIL
23.9V
SHARED BUS
BATTERY
86%
HOT-SWAP · PACK
VISOR
CLEAR
DEFLECTOR + HYDROPHILIC
HEATED VISOR
NONE
NO FACE-LEVEL HOT SPOT
FAN REDUNDANCY
2 / 2
EITHER HOLDS BASELINE
HEAD COOLING
ACTIVE
SAME STREAM AS BREATHING
SYS·02·FSENSOR FUSION · ONE PICTUREI² LOW-LIGHT + LWIR THERMAL · FUSED IN-HELMETACTIVE
TWO SENSORS.
ONE PICTURE.
Image-intensified low-light sees texture and depth; long-wave thermal sees heat through smoke and foliage. SENTINEL fuses both into a single in-helmet picture, drive the FUSE blend and the sensor gain, and watch contacts hold lock across the transition.
I²LWIRFUSE 55%
SENSOR MODEMODE
SENSOR GAIN60/100
60%
ACTIVE MODE
FUSED
FUSED
CONTACTS
3lock
HELD ACROSS BLEND
INTEGRATION
22ms
GAIN-DRIVEN
SNR
11.4dB
POST-FUSE
THERMAL
LWIR
8–14 µm · UNCOOLED
LATENCY
< 33ms
GLASS-TO-GLASS
No helmet emitters: the picture is generated inside the optic, not projected outward. Thermal cuts smoke and foliage; intensified low-light keeps the scene legible. Fusion is the default, either sensor alone is one softkey away.
THROUGH SMOKE
YES
LWIR PENETRATES
SCENE TEXTURE
HIGH
I² DETAIL
HEAT DISCRIMINATION
ACTIVE
WARM CONTACTS
NVG-COMPATIBLE
YES
ALONGSIDE ISSUED NVGs
SYS·08CONFIGURATIONS · LOADOUT SELECTIDENTICAL ELECTRONICS · DIFFERENT SHELLACTIVE
THREAT-ZONE COVERAGE · FD-S1-T
RATED BALLISTIC UPGRADE
ZONE
S1-T · BUMP
S1-B · BALLISTIC
CROWN
IMPACT
IMPACT
CENTRAL
IMPACT STD
NIJ IIIA
TEMPLES
IMPACT
FRAG-RATED
MANDIBLE
OPTIONAL
FULL COVER
UPPER-REAR
VENTED
FRAG (HI-CUT)
● COMMON TO BOTHIDENTICAL ELECTRONICS · INTERFACES · UX
▸ ONE PLATFORM. The decision is shell-level threat protection, nothing about training, integration or service changes between SKUs.
SYS·LIM
OPERATING LIMITATIONS
KNOWN CONSTRAINTS · READ FIRSTCredibility comes from stating what the platform can't do as plainly as what it can. These are the boundaries , terse and matter-of-fact.
L1
NOT AN NVG REPLACEMENT
No image-intensifier tubes. Camera-and-thermal augmentation carries ≈ 35–80 ms pipeline latency, higher in near-total darkness. SENTINEL is designed to be worn WITH standard NVGs.
L2
CBRN REQUIRES SEALED MODE
Full respiratory protection needs the neck seal cinched and a clean-shaven sealed mode. The CBRN collar is a fitted module, not always present on the baseline helmet.
L3
HIGH-CUT REAR IS FRAG-ONLY
The upper-rear zone is fragmentation-rated, not full ballistic, the standard compromise made to route cables and exhaust vents.
L4
DUMB ACCESSORIES IN v1
Rail-mounted third-party lights, strobes and rails are supported as dumb accessories in v1. No accessory data integration yet.
L5
SUBMERSION IS CONSUMER-GRADE
IP68 at consumer grade (≈ 1.5–6 m). Splash, rain and brief immersion, not a dive system.
SENTINEL HMD-1 · INTEGRATED TACTICAL AWARENESS PLATFORM
THE LINE
STARTS HERE.
Integration over attachment. Awareness without overload. Signature discipline on every axis. Honest about what it is, and what it is not.
SYS