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Visual approach

Visual approach is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Visual approach rather than just read about it. In short: In aviation, a visual approach is an approach to a runway at an airport conducted under instrument flight rules (IFR) but where the pilot proceeds by visual reference and clear of clouds to the airport. The pilot must at all times have either the airport or the preceding aircraft in sight.

Visual approach — main illustration
Visual approach — illustration

Key takeaways

  • Visual approach belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Visual approach to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Visual approach from memory before moving on to harder problems.

Reference excerpt

In aviation, a visual approach is an approach to a runway at an airport conducted under instrument flight rules (IFR) but where the pilot proceeds by visual reference and clear of clouds to the airport. The pilot must at all times have either the airport or the preceding aircraft in sight. This approach must be authorized and under the control of the appropriate air traffic control (ATC) facility. The International Civil Aviation Organization (ICAO) definition adds that the visual approach can commence when "either part or all of an instrument approach is not completed", varying only slightly from the Federal Aviation Administration regulation and is essentially identical.

Purpose The visual approach allows a pilot to fly to the runway without having to perform an instrument approach. This can greatly reduce pilot and controller workload, and expedite traffic by shortening flight paths to the airport. Taking a shorter route to the airport in lieu of flying a complicated instrument approach procedure (IAP) can increase pilot safety, as the critical tasks of approach and landing occur when pilots are most fatigued. Controllers also benefit from visual approaches, for whom a visual approach is an essential tool in the effort to maximize traffic flow (especially at busy airports). Visual approaches dramatically reduce controller workload—ATC's IFR separation requirements may be reduced, under specific rules and circumstances, which relieves controllers of the burden. Visual approaches can also result in additional risks such as the misidentification of the landing runway, which resulted in an Atlas Air Boeing 747 LCF landing at the small Colonel James Jabara Airport rather than McConnell Air Force Base where it intended to land. Other similar incidents have occurred. Particularly in congested airspace, visual approaches can increase pilot workload due to the high situational awareness required. This is because when a pilot accepts a visual approach, the pilot accepts responsibility for establishing a safe landing interval behind the preceding aircraft, as well as wake-turbulence avoidance and to remain clear of clouds. According to ICAO Doc. 4444, (def., 6.5.3 + 6.5.4.3 + 8.9.5) an approach by an IFR flight when either part or all of an instrument approach procedure is not completed and the approach is executed in visual reference to terrain. The pilot shall maintain visual reference to terrain and the reported ceiling shall be at or above the approved initial approach level. Metrological conditions is such that a visual approach and landing can be completed. For radar vectors, a clearance for visual approach shall only be issued if the pilot has reported the aerodrome or preceding aircraft in sight, at the time where vectors would normally cease. Part-NCO.OP page 27: A visual approach is not permitted when runway visual range (RVR) is less than 800 metres.

See also Contact approach Instrument approach Night VFR (NVFR) Special visual flight rules (SVFR) Visual flight rules § Controlled visual flight rules (CVFR)

References

Illustrations

Visual approach: Approach plate for the river visual 19 into Ronald Reagan Washington National Airport. Pilots fly above the Potomac River until over the Rochambeau Memorial Bridge at which time they line up for their final approach.
Approach plate for the river visual 19 into Ronald Reagan Washington National Airport. Pilots fly above the Potomac River until over the Rochambeau Memorial Bridge at which time they line up for their final approach.

Worked examples

Example 1 — a first encounter with Visual approach

Start with the simplest possible case. Write down what Visual approach claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Visual approach before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Visual approach ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Visual approach

In research
Visual approach appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Visual approach in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Visual approach is common in secondary-school and first-year university syllabi. It links to neighbouring topics Air traffic control, Types of final approach (aviation), Visual flight rules, so understanding it makes those chapters shorter.
In everyday life
Look for Visual approach outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Visual approach in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Visual approach means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Visual approach out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Visual approach in simple terms?

In aviation, a visual approach is an approach to a runway at an airport conducted under instrument flight rules (IFR) but where the pilot proceeds by visual reference and clear of clouds to the airport. The pilot must at all times have either the airport or the preceding aircraft in sight.

Why does Visual approach matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Visual approach?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Visual approach.

Tags

  • Air traffic control
  • Types of final approach (aviation)
  • Visual flight rules

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