The 4 km Rule Catches Almost Everyone. Here's What It Actually Requires.

Straight from the Civil Aviation Authority’s own drone safety guidance:

“Don’t fly within 4km of an aerodrome. Unless you have met all the requirements, including getting aerodrome operator authorisation and holding an approved pilot qualification.”

Read that second sentence again, because it is the part people skim. It is not a blanket ban. It is a conditional — and the conditions are specific. You need the aerodrome operator’s authorisation, and you need an approved pilot qualification. Under Part 101, that qualification is a drone pilot certificate.

No certificate means no lawful flight inside 4 km of an aerodrome, no matter how carefully you fly, how low you stay, or how short the flight is.

4 km is a lot closer than it sounds

When people hear “aerodrome” they picture Auckland or Christchurch International. The definition is much wider than that. An aerodrome is any area set aside for aircraft to arrive, depart and move on the surface. In practice that includes:

• Regional and provincial airports
• Council and club airfields
• Private farm airstrips and topdressing strips
• Hospital and rescue helipads

Draw a 4 km circle around every one of those and a very large share of the places people actually want to fly — town centres, coastlines, farms, construction sites, sports grounds, their own back paddock — falls inside one. Plenty of pilots have flown inside that circle for years without realising it, simply because nothing went wrong.

Nothing going wrong is not the same as being compliant. It is the same as being lucky.

The exception worth knowing: shielded operations

There is a legitimate way to operate near an aerodrome without controlled-airspace clearance, and it is worth understanding properly rather than half-remembering it. The CAA describes it like this:

“Shielded operations can take place within controlled airspace and within 4km of an aerodrome (but outside its boundary), provided that distance and height criteria specified in CATI 101-1 is adhered to.”

Shielded means flying within a defined distance of a natural or man-made obstacle — a building, a stand of trees, a terrain feature — that stands between you and any manned aircraft, and staying below the top of it. The obstacle does the shielding. The moment you climb above it or drift away from it, you are no longer shielded and you are back to needing the full set of permissions.

Shielded operations are genuinely useful, and they are also the single most misunderstood provision in Part 101. Getting them wrong tends to look like compliance right up until it doesn’t.

The rest of Part 101, briefly

The aerodrome rule sits alongside the rules most people do know. All of them apply every flight:

• Fly no higher than 120 m (400 ft) above the ground
• Keep the aircraft in sight with your own eyes at all times
• Fly in daylight, unless you hold a night rating or the flight is shielded, and in good visibility, clear of cloud
• Don’t fly over people without their consent
• Don’t fly over property without the owner’s consent
• Give way to, and stay clear of, all manned aircraft on the ground and in the air
• Stay under 25 kg and make sure the aircraft is airworthy
• Take all practicable steps to minimise hazard to people, property and other aircraft

The property-consent rule is the other quiet one. It applies to the land you fly over, not just the land you launch from — which means a flight along a coastline or across a valley can cross several titles you have no permission for.

The day it stops being a hobby

Part 101 is the recreational and low-risk operating framework. There is a point where it stops covering what you are actually doing:

• You want to fly beyond visual line of sight, over people who haven’t consented, or above 400 ft (120 m) beyond the narrow exceptions Part 101 allows
• You want to operate inside controlled airspace as normal practice rather than as a one-off
• You are being paid for work that pushes past those limits — survey, inspection, mapping, agriculture, media, infrastructure. Paid work that stays inside the Part 101 limits is legal under Part 101, but most commercial clients ask for Part 102 regardless
• A client, insurer or council has asked what your qualification is and you don’t have an answer

That is where Part 102 comes in: an operator certificate built around an exposition that sets out what you fly, where, how, and what controls you have in place. It is more work than Part 101. It is also the only route to most of the flying that people want to be paid for.

Who this isn’t for

Being straight about it: if you fly a sub-250 g drone in a paddock 20 km from anywhere, a few times a summer, for your own photos — you probably don’t need training. Know the rules, fly sensibly, enjoy it.

Training earns its keep when the flying starts to matter. When it is near an aerodrome. When someone is paying you. When there are people, stock, traffic or infrastructure underneath. When you need to be able to show — to a landowner, a client, an insurer, or the CAA — that you knew exactly what you were doing and why it was legal.

Where we fit

NZ Drones Academy is a CAA Part 141 certificated training organisation, certificate TR103670NZ. Our instructors fly commercially every week — infrastructure, agriculture, survey and defence work — so the training comes from operating, not from a textbook.

The theory is online and self-paced. The practical assessment is in person with a certified examiner, because a certificate that never involved flying a drone in front of anyone isn’t worth much.

• Part 101 Drone Pilot Certificate — the qualification the 4 km rule is asking for
• Part 102 RPAS Pilot Course — for operations beyond what Part 101 allows
• Classroom and in-person courses — if you would rather learn in a room with an instructor
• Frequently asked questions — certification, timeframes and what is involved

Not sure which one applies to you? Tell us what you want to fly and where, and we will tell you honestly what you need — including if the answer is nothing.

This article is a general summary of Civil Aviation Rules Part 101 and Transport Instrument CATI 101-1 and is not a substitute for the rules themselves. Always check the current rules and advisory material at aviation.govt.nz before you fly.