On a site near a helipad, an airfield or a VFR route, the first question is not “is there a signal?”. It is “is this a drone or a manned aircraft?”. Remote ID answers for cooperative drones. ADS-B answers for part of manned traffic. The two are read side by side. Neither covers everything.
Two broadcasts, two populations
Remote ID is the path of compliant drones: identifier, position, speed, estimated pilot position, over Wi-Fi or Bluetooth. ADS-B is the path of part of manned aviation: position, altitude, identity, generally on 1090 MHz. An ADS-B receiver does not hear a quadcopter that does not carry that function. A Remote ID receiver does not hear a helicopter.
In Europe, ADS-B does not equip every visual flight or every helicopter. The absence of an ADS-B frame therefore does not prove it is a drone. The presence of a manned-aircraft frame does let you clear an alert.
What the correlation is for in the field
A fast verification avoids sending a patrol onto a lawful overflight, and avoids the reverse: filing a drone that is hovering over a roof as “an aircraft”. Showing both families on the same map, with distinct symbols, is the operational minimum.
As an option, the DECTYR RX-5 and RX-15 can be fitted with a passive ADS-B receiver. It does not transmit. It places cooperative traffic next to drones seen via Remote ID. Where the site already has a DJI O4 Ground Station, that ADS-B stream can also be forwarded into the DJI environment, without the RX-5 becoming a DJI product.
What not to conclude
- ADS-B does not detect non-cooperative drones.
- Remote ID does not detect manned traffic.
- An aircraft without ADS-B and a drone without Remote ID are both still possible: video, radar or the radio signature decides.
- Neither authorises jamming or interception. The doctrine stays: qualify, document, escalate.
FAQ
Does every site need the ADS-B option?
No. It helps near regular manned traffic: a hospital helipad, a site under an approach path, an event with aerial coverage. An urban site with no nearby manned overflights can do without it.
Does ADS-B identify a drone pilot?
No. A cooperative drone operator’s identity comes from Remote ID and, for the authorities, from the registry. ADS-B identifies aircraft that broadcast that surveillance.
Does the receiver need a transmit authorisation?
No if it is strictly passive, like the RX-5 option. It listens. It does not interrogate transponders.