Deploying Two-Way Radios to Stranded Hikers by Drone
A small unmanned aircraft system can deliver communication equipment to hikers who are stranded beyond vehicle access, separated from their group, or unable to reach a rescue team. In bushland, alpine terrain and remote tracks, a drone may reach people faster than a ground crew carrying supplies over steep or hazardous terrain.
The payload does not need to be large. A compact two-way radio, spare battery, charging lead, printed instructions and a high-visibility pouch may restore contact long enough for emergency services to assess the situation and coordinate extraction. The aircraft may also deliver a whistle, thermal blanket or locator beacon where the mission risk and payload capacity allow.
For Australian agencies, this capability must fit within established incident command, aviation rules and communications procedures. A drone operator should never treat a radio delivery as a substitute for a distress beacon, emergency call, helicopter response or trained rescue team.
The strongest deployments are carefully planned before an emergency occurs. Agencies need compatible radios, known drop zones, trained remote pilots, clear privacy controls and a process for handing control back to ground personnel once contact is restored.
| Delivery method | Strengths | Limitations | Suitable use |
|---|---|---|---|
| Drone drop | Fast access, avoids difficult terrain, provides visual confirmation | Limited payload, weather and battery constraints, drop risk | Short-range communication restoration |
| Ground team | Can provide care, navigation and evacuation | Slow in cliffs, dense bush or flood conditions | Medical support and extraction |
| Helicopter delivery | Long reach and larger payload | Expensive, weather-dependent and operationally complex | Remote areas and urgent rescue |
| Pre-positioned radio cache | Immediate access for known users | Requires maintenance and secure storage | Popular tracks, huts and remote facilities |
When An Aerial Radio Delivery Makes Sense
A drone delivery is most useful when rescuers know, or can estimate, the hikers’ location and the aircraft can reach them without exposing a crew to unnecessary danger. Examples include a group isolated by a swollen creek in Tasmania, walkers unable to descend a cliff section in the Blue Mountains, or hikers sheltering after a sudden weather change in Victoria’s alpine areas.
The mission should begin with a risk assessment. Operators should consider wind, rain, smoke, tree cover, powerlines, cliffs, wildlife, landing or release space and the likelihood that the recipients can safely collect the equipment. A dropped object must not strike a person, damage property or create a second hazard.
A drone should provide more than a delivery mechanism. Its camera can verify the group’s condition, identify a safe release area and confirm that the package has been retrieved. Live video and recorded imagery must be handled under agency policy, with collection limited to what the rescue requires.
Selecting Radios And Payloads
A standard UHF CB radio may be practical in Australia because many compact models operate in the 477 MHz Citizens Band range under an ACMA class licence. Agencies should confirm channel settings, repeater compatibility, battery condition and operating instructions before packing radios for field deployment. A channel that works in one region may be unsuitable or congested elsewhere.
The package should be rugged, waterproof and easy to recognise. A bright pouch with a large radio symbol can help a tired or distressed person identify it quickly. Include a simple card explaining how to switch on the unit, select the assigned channel, press the push-to-talk button and speak in short messages.
Radio batteries deserve particular attention. Cold weather reduces battery performance, while a device left in a vehicle or pack may have lost charge. Use tested batteries, protect the controls from accidental activation and record the radio identifier when it is issued. Do not rely on untested consumer equipment for a critical rescue link.
Planning The Flight And Release
The remote pilot should establish the aircraft’s operating limits, launch point, return route and communications link before departure. Visual line of sight, maximum operating area, aircraft performance and the presence of other aircraft must be assessed for every mission. In Australia, operations must comply with the Civil Aviation Safety Authority framework, including applicable Part 101 requirements and any organisational authorisations.
Emergency conditions do not remove the need for disciplined aviation practice. A public safety organisation should define who can approve a flight, who controls the aircraft, how airspace conflicts are managed and when the mission is abandoned. If the operation is conducted through a ReOC holder or another approved structure, the pilot must follow its exposition, procedures and supervision arrangements.
A release mechanism is generally safer than asking the aircraft to land near people. The package can be lowered on a short line, released above a marked area or placed on a clear surface where the aircraft can remain clear of vegetation. The chosen method should be tested with the same aircraft, payload weight and weather conditions expected during an incident.
Coordinating With Emergency Services
The drone team should operate within the incident management structure rather than becoming a separate communications channel. Police, state emergency services, parks authorities, ambulance services and volunteer rescue groups may each have different radio systems and responsibilities. A pre-agreed contact point prevents duplicate searches and conflicting instructions.
In New South Wales, for example, a request involving a national park may require coordination between NSW Police, NSW National Parks and Wildlife Service, local rescue organisations and ambulance personnel. In Queensland or Western Australia, long distances and limited mobile coverage may require different launch arrangements and aircraft endurance assumptions.
The delivery message should be concise. The operator can identify the aircraft, give the package location, state the radio channel and ask the group to transmit a short status report. Rescuers should then confirm the hikers’ number, injuries, shelter, water, visibility and ability to move without requiring lengthy conversation.
Managing Privacy, Evidence And Safety
A drone camera may capture faces, voices, location data and surrounding private activity. Agencies should apply the Privacy Act 1988 where it covers their operations and check relevant state or territory privacy, surveillance-device and public-sector information rules. Victoria, New South Wales and other jurisdictions may impose additional requirements on recording or handling personal information.
Only necessary imagery should be collected, accessed or retained. A flight log should record the mission purpose, aircraft, pilot, time, location, payload, release outcome and any relevant safety event. If footage could become evidence in a missing-person or criminal investigation, preserve it through the agency’s approved digital evidence process.
Community confidence also matters. Agencies can explain that the aircraft is being used for a defined rescue purpose, that imagery access is restricted and that retention follows policy. Public information should avoid exposing the hikers’ identity or precise location unless disclosure is necessary for safety.
Testing The Capability Before Deployment
A practical exercise should begin with a short simulated incident near a known trailhead, then progress to terrain resembling real operations. Test radio range, repeater access, payload handling, visibility, launch and recovery, battery margins and contact with the incident controller. Include a failed delivery and a lost-link procedure.
Australian conditions require varied testing. Heat around Perth, sudden storms near Brisbane, dense forest in the Dandenong Ranges and cold alpine weather can affect batteries, aircraft stability and human performance. Agencies should also account for popular weekend walking areas, where bystanders may gather near launch sites or become visible in aerial footage.
After each exercise, update the equipment list, flight procedures, radio instructions and risk controls. Store radios where batteries can be checked, seal packages against moisture and maintain a roster of trained pilots and communications staff. A capability that is available, inspected and rehearsed is far more valuable than equipment purchased only for occasional emergencies.
Public safety agencies can turn this concept into a controlled capability by pairing aviation expertise with rescue communications planning. Establish a local operating procedure, test a complete radio payload, coordinate with CASA-compliant aviation personnel and conduct a scenario-based exercise with police, parks and volunteer responders. Document the results and place the approved kit where it can reach stranded hikers without delay.