05/10/2026
What if Ag drones had never been part of aviation and instead managed under the same health and safety law that covers the tractor, quad bike, and chainsaw?
Let’s look at WorkSafe’s "Keep Safe, Keep Farming" guide for an answer. Identify what could cause harm, eliminate or minimise the risk, make sure everyone affected understands it, keep it current, and make safety part of everyday work.
So let’s apply WorkSafe to Ag drones
Prior to starting the operator goes through the operating procedure guide that’s small compact, easy to read and understand. Any changes in affected people, roads, powerlines, trees, chemicals and weather are recorded. The big physical hazards go on the hazard register.
Regional plans generally require anyone applying agrichemicals from the air to hold a chemical application qualification. So only trained operators. Agrichemicals are approved by the EPA, and most are registered under the ACVM Act. The Hazardous Substances Regulations cover storage, handling and training. Regional plans have conditions on use, and point to NZS 8409.
Spray drift is already regulated through EPA controls, product labels, regional rules and the operator’s chemical training. Ag drones typically spray only a few metres above the crop or ground, so their application and risk profile is quite different from conventional aerial spraying by helicopters and aeroplanes.
Now the part aviation people will raise. Shared airspace. Manned aviation coming in low while an Ag drone is operating is a risk. They shouldn't be that low over a property without the owner's knowledge, but it can happen in transit, and a ridge line is the most likely place to meet an ag drone.
In this model it’s a risk assessment, with controls to match: knowing which aerial operators work the district, coordinating with them, and a drill for getting clear the moment another aircraft shows up. If you're working shielded and staying below 50 feet, the chance of meeting another aircraft is very low.
It still needs proper risk controls. But the question is whether the whole safety system needs to become an aviation certification system to manage it.
A WorkSafe style Ag drone operation in one paragraph:
Make sure the operator is trained and competent, identify the job, check for hazards and how they'll be managed. Check equipment, weather, product label and regional plan conditions, check no other aircraft is working the area, and ensure everyone involved knows what's happening. During the job, watch for changing conditions. If something changes, stop and reassess. Record incidents and near misses, learn from them, and update the hazards, or training where needed. Keep the paperwork simple and focused on the actual risks.
Sounds workable but that’s not how it’s done. Currently every operator using an Ag drone is treated like a small airline by CAA.
Does safety come from regulating a machine by what it's called, or from managing the risk where it actually happens?