Plane spotting, done properly

Spotting is legal almost everywhere, and welcome at a surprising number of airports — but the details vary by country, and the fastest way to ruin it for everyone is to be the person who climbed a fence.

Where to stand

Many large airports have an official viewing area, mound or terrace, and those are always the right first choice: you get a clean sightline, you're expected to be there, and nobody has to come and ask what you're doing. Failing that, public roads and footpaths around the perimeter are normal. Airport operations staff and police are generally relaxed about people with cameras standing in obvious public places, and much less relaxed about anything that looks like access.

The rules that actually matter

• Never cross a fence, gate or marked boundary, and never enter an operational area.
• Don't point anything that looks like it could be aimed — lasers obviously, but also be sensible about large lenses near a cockpit on short final.
• Photography restrictions differ by country. Some states restrict photographing airports or military aircraft outright. Check before you travel, not after.
• If someone official asks what you're doing, tell them plainly. It almost always ends there.

Gear, honestly

A 70–300mm zoom on any modern body covers the great majority of civil spotting. Longer glass helps at big airports with distant runways, but it is not the thing standing between you and a good photo — position and light are. A cheap ADS-B receiver or a tracking app on your phone is more useful than another 100mm of reach, because it tells you what's inbound and when.

Weather and light

Wind direction decides the runway in use, which decides where you should be standing; that is the single most useful thing to check before you leave. If you don't want to work it out from the METAR yourself, runwayinuse.com answers it directly for a given airport, and shows the evidence it used — ATIS, wind, observed traffic and local convention — rather than just asserting a number. Overcast is kinder to metal than harsh midday sun, and low sun behind you in the early morning or late afternoon is the classic choice.