# How do pilots fly with zero visibility?

> Pilots fly through clouds and fog using instruments, and land in low visibility with the Instrument Landing System and autoland on certified aircraft.

Pilots don't need to see outside to fly. Airliners are flown "on instruments": displays show attitude, altitude, speed and heading, while navigation systems and air traffic control keep the aircraft on its route. For landing in fog, the Instrument Landing System (ILS) guides the aircraft down to the runway, and certified aircraft and crews can let the autopilot land the plane in very low visibility.

## Flying in clouds

Commercial flights operate under Instrument Flight Rules (IFR). Pilots are trained and regularly tested to fly solely by reference to instruments. Satellite and ground-based navigation keep the plane on course, and controllers separate aircraft using radar and other surveillance, so seeing other planes isn't how pilots avoid them in cloud.

## Landing when you can't see the runway

- **ILS** sends radio beams that give precise left-right (localizer) and up-down (glide slope) guidance to the runway.
- **Approach categories.** Standard approaches require the pilots to see the runway lights by a set "decision height." Category II and III approaches allow progressively lower decision heights and visibilities.
- **Autoland.** In the lowest categories, the autopilot flies the approach, flares and lands, and on some systems keeps the plane on the centerline during rollout. Pilots monitor and are ready to go around.
- **Go-around.** If the required visual references aren't there at the decision point, the crew climbs away and either tries again or diverts.

## Is there ever truly zero visibility?

Approvals for the lowest-visibility landings exist, but airports still need some visibility for taxiing to the gate, so true zero-visibility operations are essentially not used in practice. When fog is below the minimums for an airport, aircraft and crew, flights hold, divert or wait.

## FAQ

**Can pilots see when flying through clouds?**
No – inside a cloud they see little or nothing outside, which is why they rely on instruments.

**How do pilots land when they can't see the runway?**
They follow ILS guidance and, in the lowest visibility, use autoland, provided the aircraft, crew and airport are certified for it.

**Are low-visibility landings safe?**
Yes. They are tightly regulated, use redundant systems and require specific training and certification.

**Why are flights delayed by fog?**
Low-visibility procedures increase spacing between aircraft, so airports handle fewer arrivals per hour.

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https://inyourtravel.com/how-do-pilots-fly-with-zero-visibility/ · In Your Travel · Checked 2026-10-30