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Low Visibility Operations: Minima, Approvals and Training
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Low Visibility Operations: Minima, Approvals and Training

October 26, 2026

Low Visibility Operations: Minima, Approvals and Training

Taxiway holding-point lights fade into low visibility

Low visibility operations (LVO) are takeoffs, approaches, landings and taxiing carried out when fog, snow or heavy rain cuts what the crew can see below the standard limits. In practice that means flying to Category II or III minima, taking off in reduced RVR, and moving on the ground under an airport’s low-visibility procedures. Each of those needs an approved aircraft, an approved operator, a trained crew and an airport that is running the right procedures. This guide covers what the numbers are, who must hold what, and how simulator training builds the skills.

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TL;DR

  • LVO covers CAT II and CAT III approaches, low-visibility takeoffs (LVTO) and surface movement in very low RVR. The FAA’s own lowest taxi-focused program applies below RVR 1,200 ft.
  • Minima step down by category: the FAA lists CAT I at DH 200 ft and RVR 2,400 ft, CAT II at DH 100 ft and RVR 1,200 ft, then CAT III with RVR limits at or below 700 ft.
  • Authorization is layered: aircraft and equipment, operator approval, crew training and checking, and an airport running low-visibility procedures.
  • CAT III practice is meant for a flight simulator, not the aircraft. Recurrent checks include low-visibility rejected takeoffs, go-arounds at DH and landings from DH.
  • Rules differ by authority, so check the regulator that issued your certificate and the one that governs the operator.

Table of Contents

What low visibility operations actually include

Pilots often use LVO as shorthand for “Cat III approaches.” The full picture is wider. It has three working parts:

  1. Low-visibility approaches and landings, flown below standard CAT I minima, usually with autoland or a head-up guidance system.
  2. Low-visibility takeoffs (LVTO), where visibility or RVR is below what a normal takeoff allows.
  3. Surface movement, which is taxiing, holding and crossing runways when the tower cannot see the whole airfield.

The airport side is called low-visibility procedures (LVP). They are applied to ensure safe operations during lower-than-standard Category I, Category II and III approaches and low-visibility takeoffs, and they can be introduced when visual control or the required visual reference is no longer possible, as IVAO’s documentation library describes it. ICAO’s European guidance material defines the trigger condition as reduced aerodrome visibility conditions: weather in which all or part of the maneuvering area cannot be visually monitored from the control tower (ICAO EUR guidance, 2023).

The same document describes LVP activation in three phases: a preparation phase triggered by deteriorating forecasts, an operations phase once ground and airborne measures are in place, and a termination phase that returns the airport to normal working. As a pilot you will hear this as ATIS wording and ATC instructions: “low visibility procedures in effect,” additional holding points, and larger spacing between aircraft.

Approach categories and the numbers that matter

Runway visual range (RVR) is the measured distance a pilot can see along the runway, reported for the touchdown, midpoint and rollout zones. The FAA’s technical guidance says RVR systems are critical to LVO because the readings are used to set airport categories and shape ATC instructions (FAA RVR page).

The same FAA page gives the standard US minima:

Category Decision height (DH) RVR
CAT I 200 ft 2,400 ft (1,800 ft with touchdown-zone and centerline lighting)
CAT II 100 ft 1,200 ft
CAT IIIa No DH, or DH below 100 ft At least 700 ft
CAT IIIb No DH, or DH below 50 ft 150 ft to under 700 ft
CAT IIIc No DH No RVR limitation

Europe expresses the same ladder in meters. Under EASA’s CS-AWO Issue 2, Type B instrument approach operations have a minimum DH below 250 ft. CAT II has an RVR not less than 300 m, and CAT III covers RVR below 300 m or no RVR limit (EASA explanatory note to ED Decision 2022/007/R). The numbers are not identical across regulators, and operators publish their own approved minima for each runway, so treat any table as orientation and fly to your approved values.

Why surface movement gets its own program

In the United States, the FAA’s advisory circular on LVO/SMGCS focuses on safe taxi operations when visibility is less than RVR 1,200 ft (350 m). It gives airports an acceptable, voluntary way to build a surface movement plan with defined taxi routes (FAA AC 120-57C). For the crew, that translates into specific routes, lighting and marking you must know before you leave the gate, because the approach is only half of the problem. Many low-visibility incidents start with a wrong turn on the ground.

Who must be approved for what

LVO is a chain, and every link needs authorization. The Civil Aviation Safety Authority of Australia lays it out clearly, and the structure is similar elsewhere: the operator needs an LVO approval, the aircraft must be eligible and type-certified for it, and the flight operations documentation must support it. For initial applicants CASA requires a six-month demonstration and 30 CAT I landings where DH is 50 ft or more, or 100 where DH is below 50 ft (CASA OPS.12).

Low-visibility takeoff approvals are separate. CASA requires one for takeoffs in visibility below 800 m or RVR below 550 m, and the equipment, lighting and sensors available set the lowest RVR permitted, down to 75 m for a properly equipped aircraft (same CASA document).

The airport is part of the chain too. The aerodrome operator and ATC jointly develop reduced-visibility procedures, including protection of ILS signal integrity and runway safeguarding (ICAO EUR guidance). That is why LVP cuts airport capacity: aircraft and vehicles are kept farther from the sensitive navigation signals, and fewer movements fit in an hour.

What this means for a pilot’s own file

You do not hold an “LVO license.” You hold the qualification through your employer’s approval, the type of aircraft you fly, and your training and checking record. A new first officer joining an airline that operates CAT III will usually complete the low-visibility modules as part of company training. A foreign pilot converting to FAA privileges should expect the same topics to appear in the airline’s own program afterward. If you are planning that path, our overview of FAA license conversion explains the steps.

What low visibility operations training covers

The regulatory baseline is simple. For operational credits, operators must establish a training program for flight crew members and the other staff involved in flight preparation (ICAO APAC working paper, 2024). What goes into the program is where the quality shows. A solid LVO syllabus normally has these blocks:

  • Knowledge: fog types and how quickly they form and clear, RVR versus meteorological visibility, the category ladder, and what each light, marking and sign means in LVP.
  • Aircraft systems: autopilot modes, autoland capability and limits, head-up display behavior, and what each failure does to your minima. Failures of equipment at or below DH are a classic scenario.
  • Procedures: approach briefings, alert height, callouts, and who monitors what. Operators write these into flight operations documentation covering downgrades, equipment failures, loss of visual reference at or below DH or alert height, and standard missed approaches (CASA OPS.12).
  • Decision-making: when to go around, when to divert, and when not to accept the approach at all.
  • Surface operations: taxi route reading, stop bars, position reports and runway incursion avoidance in near-zero visibility.

Transport Canada’s all-weather operations manual makes a point that every instructor repeats: increased dependence on automatic systems requires greater emphasis on the pilot’s supervisory role and decision-making (TP 1490). The aircraft flies the approach, but you own the decision to continue.

How simulators build the skills

You cannot practice a CAT III failure in real fog on demand, and nobody should try. That is why regulators lean on flight simulation. EASA’s guidance for specialized operations says CAT III approaches should be conducted in a flight simulation training device (FSTD). Its recurrent checking includes low-visibility rejected takeoffs at minimum approved RVR, approaches followed by a go-around at DH, and approaches and landings with visual reference established at DH (EASA AMC & GM to Part-SPA).

For CAT III with a fail-passive autoland system or HUDLS, the same document says pilots should complete a missed approach following an equipment failure at or below DH at least once during three consecutive proficiency checks.

Exercises worth repeating

A good simulator session for LVO is built around repetition of a small set of events, each flown with the full crew:

  1. A CAT II or III approach to autoland with correct briefing and callouts.
  2. A go-around at DH because visual reference was not acquired.
  3. An autopilot or ground-equipment failure at or below DH, followed by a missed approach.
  4. A rejected takeoff in minimum RVR, which tests directional control with few external cues.
  5. A low-visibility taxi to a gate or holding point using only a route chart and ground markings.

The value comes from running these at realistic fidelity. Level D full-motion devices reproduce the feel of rollout, the cue loss in fog, and the workload spike when an alert appears at 100 feet. Practicing on a lower-fidelity trainer teaches the procedure but not the timing.

Recurrent training and checking

LVO currency is not a one-time event. Recurrent training and proficiency checks are generally annual or semi-annual, often in a simulator testing specific LVO exercises, and requirements vary by authority. Some use conventional training cycles and others use Advanced Qualification Programs (AQP) to manage competency and recurrency (CASA OPS.12).

Two examples from Canada show how different the details can be. For 705 operations, CAT II/III certification is valid for six months (TP 1490). For reduced-visibility aeroplane operations under Standard 722, pilots need 500 hours of experience, and training includes decision-making initially and every three years, instrument flight initially and annually, and annual equipment and company-procedure training (Standard 722).

The direction of travel is toward alignment. EASA states that one of its aims is harmonization, as far as possible, with ICAO documents and with FAA and other major-regulator rules (EASA explanatory note). Still, never assume a check passed under one authority satisfies another. If you fly under FAA rules, see how simulator credit fits into 14 CFR recurrent training.

Recurrent training and checking — overview diagram

Risks and limits you manage on the day

Low visibility is a trade between access and margin. The benefits are real: EASA notes that operational credits increase the number of suitable destination and alternate aerodromes in reduced visibility, cutting weather delays, cancellations and diversions, and enabling shorter routings and lower fuel costs (EASA explanatory note). The price is a thinner safety buffer that you rebuild with procedure and discipline.

The risks that come up most in training debriefs:

  • Late loss of visual reference at or below DH or alert height. The answer is the standard missed approach, flown without hesitation.
  • Downgrades in flight. A change in equipment status can raise your minima mid-approach, so know the downgrade table before you brief.
  • Surface confusion. Low-visibility taxi errors tend to come from rushed readbacks and unfamiliar layouts.
  • Expectation bias. Crews who have flown many successful autolands may stop watching the monitoring cues.
  • Fatigue and pressure late in a duty day when the alternate is far away.

Our perspective: train the decision, not just the autoland

Most pilots we see arrive with the mechanics of an ILS under control. What separates a smooth LVO check from a rough one is the crew’s shared mental model: who calls what, what triggers a go-around, and how the plan changes when a ground system drops out. We have found that this is the part people under-practice, because an autoland that works feels easy.

Our perspective: train the decision, not just the autoland — overview diagram

Our approach on Level D devices is to spend the session on the unpleasant minutes: the failure at 80 feet, the rejected takeoff on a contaminated runway, the taxi where the chart and the windscreen disagree. Our instructors are current and former airline pilots and examiners, so they debrief the way a line check airman will. If you are heading into a first airline simulator assessment, a short block of LVO scenarios before it is time well spent, and it pairs naturally with an ICAO competency-based interview plan and a simulator-first approach to line-oriented evaluation.

The airport is part of the safety system too. The ICAO EUR material stresses that LVO safety depends on tight coordination between aerodrome operator and ATC as well as the pilot. Treat the tower and ground staff as crew members you cannot see.

— Jake

Prepare for LVO on a Level D simulator

We offer hourly and block simulator training on full-motion Level D devices for the A320, A330, B737, B737 Classic, B757/767 and ATR 42/72, and the same devices are used in our type rating programs. You can book sessions focused on CAT II/III approaches, go-arounds at DH, low-RVR rejected takeoffs and recurrent refreshers. If you fly the narrowbody most airlines hire for, start with Boeing 737 simulator sessions or A320 sessions. Pricing is not published, so contact us through the course page for a quote and scheduling.

A practical checklist before your next low-visibility event

  • Confirm your operator’s approval and your own training record cover the minima you expect to use.
  • Review the airport’s LVP, taxi routes and holding points before pushback.
  • Brief the downgrade table and the missed approach, including who flies and who monitors.
  • Decide before the approach what you will do if the visual reference is not there at DH.
  • Rehearse the rejected takeoff call-outs if takeoff RVR is near your minimum.
  • Debrief afterward, even when everything went well. Normal days teach as much as bad ones.

FAQ

What is the difference between LVO and LVP?

LVO describes what aircraft and crews do in low visibility: approaches, takeoffs and taxiing. LVP are the airport-side procedures that make those operations safe, such as extra holding points, protected ILS areas and restricted vehicle movement. Both usually activate together when visibility falls.

Do I need a special license for low visibility operations?

No separate pilot license exists. Authorization comes through the operator’s approval, an eligible aircraft and your training and checking record. Your airline or training provider documents which categories you may fly.

Can CAT III training be done in the aircraft?

Generally it is done in a simulator. EASA’s guidance says CAT III approaches should be conducted in an FSTD, and its recurrent checks of low-visibility exercises are built around simulator events (EASA AMC & GM to Part-SPA).

How often is LVO training repeated?

It depends on the authority and the operator. Many programs repeat it annually or semi-annually in recurrent simulator checks, while some Canadian requirements run on six-month, annual or three-year cycles depending on the item. Check your operator’s approved program.

Sources

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