Ridges block radios. Cell service is a rumor. In a bad moment, one question matters most: where is the crew, and when was that last confirmed? Too often, nobody knows.

Federal auditors at the Government Accountability Office found that firefighters still rely mostly on voice radio and that wrong or outdated location data can contribute to deaths and slow rescues. At Yarnell Hill in 2013, the crew lost communications for about 30 minutes before the fire overtook them. This June, on the Knowles Fire in Colorado, smoke at ground level kept a helicopter from landing to pick up a five-person helitack crew. Four of them died.

A person sent into danger should never drop off the map. That idea needs no defense. It only needs hardware.

A Few Hundred Dollars and a Plane That Rides Rising Air

Edison Aerospace, a Miami aerospace research and development company led by CEO Gene Avakyan, says it can close the gap for a few hundred dollars per firefighter and an aircraft that stays up most of a shift on rising air. The system pairs a body-worn sensor node with a long-wing unmanned aircraft that works as a flying radio tower and, in its newest form, carries a look-down thermal camera and onboard AI that watch the fire line and the people near it.

Edison is plain about where the project stands. "The design is complete on paper, and the pieces exist," Avakyan wrote. "What comes next is proving the integrated system through controlled tests with real users and real equipment."

The Body Node: Small on Purpose

Each firefighter would carry a node a bit bigger than a deck of cards, clipped to a pack strap. It knows where it is, how much battery it has left, and whether its wearer has pressed a distress button. It reads a chest strap for heart rate and breathing rate, plus a skin-temperature sensor and a sweat sensor. It samples the air around the firefighter for temperature and humidity. Crew leaders' nodes add carbon monoxide and smoke-particle sensors.

None of those parts is new. Putting them together is the point.

The nodes talk over LoRa, a long-range, low-power radio band. They run Meshtastic, open-source mesh software that turns every node into a relay for every other node. No cell tower, no base station, no subscription fee. If one node can hear another, the message gets through. The parts are mostly off the shelf, and Edison's own parts list puts a basic body node under $300.

"The useful message is small," Avakyan wrote. A position fix, a timestamp, a few sensor readings, and a status code all fit in one packet. That is the whole trick. Send only what matters, and a radio running on milliwatts can reach for miles.

The voice radios firefighters already carry stay right where they are. "This would not replace them," Avakyan wrote. The data link adds what voice does badly: exact positions, each firefighter's physical status, proof that a message arrived, and a record of all of it.

The Drone as a Very Tall Antenna

Terrain is the enemy of every ground radio, so Edison puts a relay node where terrain cannot block it: on an unmanned aircraft circling 1,000 to 2,500 feet above the fire area, standing off to the side instead of orbiting over the flames. That height also gives a full view of the fire, with no human life at risk in a cockpit.

The airframe is Edison's own EDISON High-Endurance Autonomous Aircraft. It is a large fixed-wing plane with several small electric motors along a glider-style soaring wing and a compact battery pack. "The endurance idea comes from soaring," Avakyan wrote. "A low-wing-loading aircraft climbs on rising air whenever the lift exceeds its sink rate." Open-source flight control software has already shown autonomous thermal soaring and navigation with powered gliders. Edison's target is a relay mission of twelve hours or more.

The relay payload draws less than a watt. A second aircraft takes station before the first one leaves, and the handover is judged at the command post, where someone makes sure crew updates never stop. When weather or firefighting aviation forces the drone down, a solar-powered repeater on a ridge or a truck mast covers the gap. More aircraft can stretch coverage further, all flown from one ground control station. That station fits in a trailer that also serves as the aircraft's hangar and transport.

Edison is just as direct about sharing the sky. Broadcasting the drone's position helps, Avakyan wrote, but it "does not by itself create separation from manned firefighting aircraft." Launch, orbit, recall, and recovery would all fit inside the incident's aviation plan. Beyond see-and-avoid, the system will use ADS-B In and an onboard visual collision-avoidance system to warn the pilot of other aircraft nearby.

An AI Eye on the Fire Line

The newest addition turns the relay drone into a lookout. An infrared camera and a visible-light camera point down. A small onboard AI computer, the kind now common in robotics, runs machine-vision models that track the fire's edge, report which way it is moving, and find hot spots.

The key choice is what the aircraft sends. Not video; the LoRa mesh could never carry it. It sends data instead: the fire line as a short list of map coordinates, hot spots with their peak temperatures, and detected resources with a confidence score. Each one fits in a packet. Raw images can travel over a separate, optional high-bandwidth link only when a commander asks to see them.

At the command post, Edison's software lays the fire line and crew positions over the map, along with the wind and the resource picture, all in one record. It then writes advisory messages for commanders. A crew sits between a moving fire front and no escape route. A hot spot has flared up again behind the line. An engine has not moved in an hour.

Those advisories are only recommendations. A person reads each one, acts on it or dismisses it, and the decision is logged. The distress path, from a firefighter's button to a commander's screen, never waits on any of it.

Three Message States, and Only One Counts

Every position report carries its own age and its own margin of error, so a dot on the map cannot pretend to be current when it is not. Every sensor reports whether it is working, stale, or out of range.

Every message has one of three states: queued on the node, received at command, or acknowledged by a named person. Only the last one counts. In the words of Edison's technical document, it is "the only state that counts as someone knows."

Health readings get the same treatment. "A number on a screen is not a medical condition," Avakyan wrote. Skin temperature is not core body temperature. A sensor clipped to a pack does not breathe what the firefighter breathes. In Edison's design, engineers build the instrument, and medical and occupational-safety experts decide what the readings mean. No automatic medical reading ships until they sign off.

Tablets for Squad Leaders

Edison also proposes giving squad leaders a rugged Android tablet running ATAK, the mapping app already widely used by the military and public safety agencies, linked to the leader's node by Bluetooth. The leader sees crew positions, the drone's fire-line overlay, advisories, and short messages, without adding traffic to the mesh. Individual firefighters could carry a phone with the same app in a later phase. For now, Edison's view is that a head-down screen on the fire line is a cost, not a gift.

Earning Trust, One Test at a Time

Edison's Black Swan (secure device identity and message delivery) and AgentPrizm (the incident record) come from its defense proposals to the Navy, Army, Air Force, and DARPA. Firefighting is their first civilian job, and the test plan is built to earn the trust of the people who would wear the gear.

"The sequence is deliberate," he wrote. Controlled tests come first. Then ground links and sensors in the field. Then approved short relay flights, then longer sorties, then the complete system. Trials would run alongside normal procedures, under incident-command recall, with no reliance on the experimental alerts. Each stage reports its failures and must clear a readiness check before the next one starts.

Success, in Avakyan's words, is simple: "firefighters and command sharing one clear picture under the worst conditions, knowing which observations are current, which are uncertain, and which messages have reached a person who can act."

The system does not have a name yet. Edison says it is choosing one that puts the firefighters first, not the fire.