Ref Page 101 Cosgrove 8th Edition

A runway that is wider than normally used will give a visual impression of being closer than it actually is, which causes the pilot to perceive the aircraft as being too low on the approach.

Because the options provided do not directly list “closer” or “lower,” let’s look at how a wide runway alters your perspective to find the correct fit:

• The Illusion: A wide runway fills more of your windshield, mimicking the exact visual perspective you would see if you were much lower and closer to a normal-width runway.

• The Pilot’s Reaction: Believing they are too low, a pilot’s natural instinct is to fly a higher approach than normal to make the runway look “right” again.

• The Slope Effect: Because the wider threshold makes the runway look like it is opening up dramatically toward you, it creates the optical illusion of the runway sloping away from the pilot (an downslope illusion).

Because the runway is unusually wide, the aspect ratio changes. The length-to-width proportion makes the runway look stubby or compressed, giving the visual impression that it doesn’t extend as far into the distance as a normal runway would.

The lack of oxygen reaching the body’s tissues is known as Hypoxia.

In aviation, this is particularly dangerous because it can happen gradually without the pilot noticing.

Common Symptoms

• Confusion or poor judgement.

• Euphoria (feeling “high” or overly happy despite being in danger).

• Cyanosis (a blue tint to the lips or fingernails).

• Reduced vision, especially at night.

Page 122 of the SKYway Code LINK

Ref Page 105 Cosgrove 8th Edition

If a student pilot feels that an instructor has made an incorrect assessment of a situation, they should wait until a safe, low-workload phase of flight (or, ideally, the post-flight debrief) to calmly and openly discuss it. During flight, safety and the chain of command are paramount; unless the instructor’s action poses an immediate, catastrophic threat to the safety of the aircraft, the student should follow the instructor’s guidance to maintain situational control. Once on the ground, the student should ask clarifying questions using a non-confrontational, “threat and error management” approach to understand the instructor’s perspective, which often resolves misunderstandings or reveals a valuable learning point for both parties.

Ref Page 98 Cosgrove 8th Edition

To equalize pressure between the outer ear and the middle ear during descents, it’s best to perform the Valsalva maneuver.

To do this, pinch your nostrils shut, close your mouth, and gently blow air as if you were exhaling through your nose. This forces air up through the Eustachian tubes and into the middle ear cavity, equalizing the pressure against the higher atmospheric pressure of the descent.

Other effective methods include:

• Yawning or swallowing frequently, which naturally opens the Eustachian tubes.

• Chewing gum or moving your jaw side-to-side.

Note: Avoid flying with a heavy cold or sinus congestion, as the swollen tissues can block the Eustachian tubes completely, making equalization impossible and causing severe barotrauma.

In the UK, under Civil Aviation Authority (CAA) and EASA regulations, a pilot in an unpressurised aircraft must use supplemental oxygen continuously whenever the cabin altitude exceeds 13,000 feet, and for any period lasting more than 30 minutes when the cabin altitude is above 10,000 feet. 

Page 24 of the Skyway Code LINK

See page 97 of Brian Cosgrove (8th Edition)

Ref Page 102/103 Cosgrove 8th Edition

When another aircraft is closing on a collision course, its relative bearing remains completely constant—meaning it stays locked in the exact same spot on your windscreen without moving.

Because of geometry, the visual size of the approaching aircraft doesn’t increase at a steady, linear rate. Instead, it expands exponentially (often referred to as the “blossom effect”):

• Far away: It remains a tiny, almost unnoticeable speck for most of its approach.

• The final seconds: As the distance closes to zero, its relative size on your windscreen expands dramatically and exponentially, making it appear to suddenly grow larger right before a potential impact.

Moving aircraft, especially those with little or no relative motion (converging), are harder to see because the human eye is better at spotting movement, but a potential collision target that appears stationary can blend in, creating a significant risk

Page 132 of the Skyway Code LINK

Page 102 Cosgrove 8th Edition

Ref Page 101 Cosgrove 8th Edition

If you look into a featureless sky, the eyes will tend to focus on a point about 1 to 2 metres (3 to 6 feet) away.

This phenomenon is known as empty-field myopia (or space myopia).

When the eyes have no distinct objects, distant horizons, or clouds to lock onto, the eye muscles naturally relax. Instead of focusing at infinity as you might expect, the focal distance drops inward to a very short range.

This is a significant hazard for pilots because a relaxed eye will completely miss an approaching aircraft until it is dangerously close. To combat this, pilots must actively force their eyes to look at distant objects or deliberately scan the sky in structured sectors.

Ref Page 102 Cosgrove 8th Edition

When you lose visual reference with the horizon and the ground, your brain can no longer rely on your eyes to determine your aircraft’s attitude or position. Instead, it relies on your inner ear (vestibular system).

However, the inner ear cannot accurately distinguish between actual aircraft movement and the forces of gravity or turns, especially during prolonged or gradual bank angles. This creates a powerful mismatch between what your body feels and what the aircraft is actually doing, leading to severe illusions and a total loss of situational awareness.

Ref Page 97 Cosgrove 8th

Smokers who smoke 20 cigarettes a day will absorb significantly less oxygen than non-smokers.

This is primarily due to the carbon monoxide (CO) in cigarette smoke. Carbon monoxide has an affinity for hemoglobin—the oxygen-carrying protein in your red blood cells—that is over 200 times stronger than oxygen’s affinity.

The Direct Impact

• Reduced Oxygen Capacity: When you smoke, carbon monoxide binds to your hemoglobin to form carboxyhemoglobin. This effectively “locks up” those red blood cells, preventing them from picking up and transporting oxygen from your lungs.

• Tissue Hypoxia: Heavy smoking (20 cigarettes a day) can constantly saturate 5% to 10% or more of a smoker’s blood with carbon monoxide. This means the body is permanently operating with a significantly reduced oxygen supply to its muscles, tissues, and brain.

• Higher Physiological Altitude: In aviation terms, a heavy smoker’s body is already experiencing mild hypoxia before they even leave the ground. A smoker at sea level effectively has the oxygen-absorption capability of a non-smoker standing at an altitude of around 4,000 to 5,000 feet.

The NHS recommends that both men and women should not regularly drink more than 14 units of alcohol a week, and it’s best to spread this consumption over three or more days, including alcohol-free days, to keep health risks low.

NHS Ref LINK

See NHS Link

continuing flight in very cold conditions can lead to pilot hypothermia, particularly in unheated or poorly insulated cockpits.

As body temperature drops, hypothermia progressively impairs both physical and mental capabilities. The primary dangers to a pilot include:

• Slower Reaction Times: Cold muscles and a chilled nervous system significantly delay physical responses.

• Degraded Decision-Making: Mild hypothermia causes confusion, apathy, and poor judgment, making it difficult to navigate or respond to emergencies.

• Loss of Manual Dexterity: Shivering and numbed fingers make it incredibly difficult to precisely adjust flight controls, switches, or radio dials.

Because hypothermia sets in gradually, a pilot’s self-awareness becomes impaired, often preventing them from recognizing just how dangerously cold and incapacitated they are becoming.

The major constituent of the atmosphere is Nitrogen, which makes up about 78% of the air.

While we often focus on oxygen for breathing, the atmosphere is actually a mixture dominated by nitrogen.

Met Office LINK

Page 96 – Cosgrove 8th Edition

If you suspect frostbite in your fingers, you must act carefully to avoid permanent tissue damage.

• Use Body Heat: Tuck your fingers into your armpits or have a companion hold them with their warm hands.

• Warm Water Soak: Submerge the fingers in warm—not hot—water. The ideal temperature is between 37°C and 40°C (about the temperature of a comfortable baby bath).

• Duration: Keep them in the water for about 30 minutes or until the skin feels soft and sensation returns.

• Expect Pain: Re-warming is often very painful and can cause a stinging or burning sensation. You can take Ibuprofen or Paracetamol to help with the pain

NHS Link

Symptoms of carbon monoxide poisoning

Carbon monoxide gas is colourless and does not smell, so you cannot tell if it is around you.

Symptoms of carbon monoxide poisoning include:

• a headache
• dizziness
• feeling sick or being sick
• feeling weak
• tiredness and confusion
• chest and muscle pain
• shortness of breath
• your face turning hot and red (flushing) – but redness may be harder to see on brown and black skin
• loss of vision

NHS Link 

Page 97 – Cosgrove 8th Edition

See  NHS Link

You should immediately cool the burn under clean, cold running water for at least 20 minutes to stop the tissue damage and ease the pain. While cooling, carefully remove any clothing or jewelry near the elbow before the area begins to swell, but never peel away anything that is stuck directly to the burn. Once cooled, loosely cover the injury with a clean, non-fluffy dressing or clear cling film (layering it smoothly rather than wrapping it tightly around the joint) and avoid applying any pastes, oils, or ointments. Given the cramped nature of an aircraft cockpit, keep the passenger calm, protect the elbow from further bumps, and assess if the burn requires professional medical attention based on its size, depth, or blistering.

Ref Page 99 Cosgrove 8th Edition

The medical requirement for a pilot to read a car number plate applies specifically to those flying under a Pilot Medical Declaration (PMD) in the UK. By signing this self-declaration, the pilot confirms that they meet the DVLA Group 1 ordinary car driving licence health standard, which requires the ability to read a standard car number plate clearly from a distance of 20 metres (approximately 65 feet), using glasses or contact lenses if normally worn.

Technically, the actual percentage of oxygen in the atmosphere stays the same at 21% (specifically 20.9%) all the way up to about 70,000 feet.

However, because the air pressure is much lower at 10,000 feet, the “effective” amount of oxygen is much less.

Page 97 – Cosgrove 8th Edition

Ref Page 100 Cosgrove 8th Edition

To reduce the risk, pilots should consult a doctor on any side effects which may result from particular medication.

• The Danger: Many over-the-counter and prescription drugs cause drowsiness, slowed reaction times, or blurred vision, all of which are highly dangerous when flying.

• Why the others fail: Simply buying a drug from a chemist doesn’t guarantee it is flight-safe (many standard cold remedies cause severe drowsiness). Similarly, “not taking any medication” is unrealistic, as managing a known, approved chronic condition safely with the right medication under medical supervision is often perfectly acceptable.

Consulting an aviation medical examiner (AME) or a doctor ensures the medication is fully vetted for aviation safety before you enter the cockpit.

Ref Page 104 Cosgrove 8th Edition

When you experience stress, fear, or a sudden shock, your body releases adrenaline as part of the “fight or flight” response. This hormone triggers a rapid increase in your heart rate and breathing rate to pump more oxygen to your muscles.

However, if this surge of oxygen isn’t physically needed—such as when sitting in a cockpit or facing a sudden scare—the rapid, shallow breathing can quickly turn into hyperventilation. This causes your body to blow off too much carbon dioxide, leading to symptoms like lightheadedness, tingling in the fingers, confusion, and anxiety, which can further mimic or worsen the feelings of stress.

Ref Page 97 Cosgrove 8th Edition

Alcohol accelerates and worsens the effects of hypoxia (oxygen deprivation).

It does this through a combination of physiological effects:

• Slowing Brain Function: Alcohol is a central nervous system depressant. Hypoxia also slows down brain activity. When you combine them, your cognitive performance, reaction times, and judgment degrade much faster than they would from oxygen loss alone.

• Disrupting Oxygen Uptake: Alcohol changes how your cells use oxygen. It causes histotoxic hypoxia, meaning your brain cells become less capable of actually absorbing and utilizing the oxygen that is available in your bloodstream.

• Masking Symptoms: Because alcohol impairs judgment and can cause a false sense of well-being or euphoria, a person is much less likely to notice the early warning signs of hypoxia (like dizziness, tingling, or tunnel vision) until it is too late.

In environments where oxygen levels drop—such as high altitudes or unpressurized cabins—even small amounts of alcohol drastically lower your physiological tolerance to the altitude, making hypoxia set in much faster and at a lower elevation than normal.

Ref Page 98 Cosgrove 8th Edition

Flying with nasal or sinus congestion is a serious flight safety hazard due to the pressure changes experienced during ascent and descent.

The Primary Risks

• Barotrauma (Ear and Sinus Locks): As the aircraft changes altitude, the air trapped inside your sinuses and middle ear must equalize with the outside atmospheric pressure. A head cold blocks the Eustachian tubes and sinus passages. During descent, this trapped air cannot equalize, leading to intense, agonizing pain, potential bleeding, or a ruptured eardrum.

• Incapacitation from Vertigo: If one ear equalizes and the other remains blocked (alternobaric vertigo), it can trigger sudden, severe dizziness and spatial disorientation while in flight, making it incredibly difficult to safely control the aircraft.

• Impaired Performance: Even a mild cold degrades your cognitive performance, slows your reaction times, and causes fatigue—all of which compromise safety.

The Regulatory Rule

Under aviation regulations, pilots are legally required to self-ground if they suffer from any medical condition or temporary illness that decreases their fitness to fly. If you cannot clear your ears easily on the ground, you are not fit to pilot an aircraft.

Flying shortly after giving blood can lead to Hypemic Hypoxia and an increased risk of fainting (syncope).

Even if you feel perfectly fine on the ground, your body has a reduced ability to carry oxygen and handle pressure changes for a period after donating.

1. Hypemic Hypoxia

While regular “Hypoxic Hypoxia” is caused by a lack of oxygen in the air, Hypemic Hypoxia happens because you don’t have enough red blood cells (hemoglobin) to carry the oxygen that is available.

Page 97 – Cosgrove 8th Edition

Suffering from epilepsy in the UK doesn’t automatically preclude you from flying, but it’s a serious medical condition the UK CAA closely scrutinizes, often requiring a lengthy seizure-free period (e.g., 10 years without medication for some cases) or demonstrating a very low recurrence risk, especially for private pilots; however, active epilepsy or recent seizures usually lead to unfitness, with strict assessment for commercial flying making it very difficult, often disqualifying due to safety risks.

See CAA website LINK

The Human Performance Curve

In aviation psychology, performance is measured against stress (arousal) using an inverted U-curve.

• Too Low (Under-arousal): When stress is exceptionally low, the brain enters a state of complacency, boredom, or lethargy. Without a baseline level of stimulation, your mind naturally wanders, vigilance drops, and you genuinely cannot maintain concentration on routine tasks.

• The Sweet Spot (Optimum Stress): You actually need a moderate amount of stress/arousal to be at your peak. This optimum level is what keeps you alert, sharp, and able to absorb new information readily.

Therefore, a pilot with a low stress level isn’t in their peak learning state—they are disengaged and prone to missing critical cues because their concentration lapses.

In the UK, the number of units in a pint of beer depends on its strength, known as ABV (Alcohol by Volume).

As a general rule, an “average” pint contains about 2 to 3 units

NHS LINK

Ref Page 98 Cosgrove 8th Edition

Barotrauma in flight results from changes in Altitude.

As an aircraft climbs or descends, the atmospheric pressure around it changes rapidly.

• The Cause: If air becomes trapped inside the gas-containing cavities of your body (such as the middle ear, sinuses, or teeth) due to congestion or a blocked passage, it cannot equalize with the changing ambient pressure caused by the shift in altitude.

• The Result: This pressure imbalance causes the tissues to stretch or compress, leading to severe pain and potential tissue damage (barotrauma), most commonly experienced during a descent.

The best procedure for pilots to look out involves a systematic, focused scanning technique, not just casual glances, using short, 10-degree eye movements to observe distant points for at least one second to allow for focus, covering areas horizontally and vertically, and adjusting for blind spots (like wings) by leaning or maneuvering to maximize visual awareness and detect traffic

AOPA LINK

Page 103 Cosgrove 8th Edition

Ref Page 100 Cosgrove 8th

As a general rule, it takes about 1 hour for the body to process and clear 1 unit of alcohol from the bloodstream.

However, because the human body metabolizes alcohol at a fixed rate (roughly 7g to 8g per hour), the actual time can vary depending on a few key factors:

• Liver Efficiency: The liver does about 95% of the work, and its metabolic rate is constant regardless of how much water you drink or if you drink coffee.

• Size and Gender: Your weight, muscle-to-fat ratio, and metabolism influence how high your blood alcohol concentration (BAC) gets in the first place, which can affect the total clearance time.

• Food: Eating beforehand slows down the absorption of alcohol into the blood, but it does not speed up how fast your liver breaks it down once it is in your system.

Ref Page 101 Cosgrove 8th Edition

When a runway slopes upward, more of its surface is tilted up toward your line of sight. This extra surface exposure visually stretches the runway in your field of view, creating the optical illusion that the runway is longer than it actually is (increased length) and that you are higher on the approach than you really are.

See NHS Link

Vertigo is the false sensation that you or your surroundings are spinning, tilting, or moving when everything is actually completely still. It is typically caused by a temporary glitch in the inner ear’s balance system or, less commonly, a problem in the brain’s nerve pathways. Unlike general lightheadedness, true vertigo creates an unsettling, dizzy illusion of motion that can often trigger nausea, vomiting, and a loss of balance.

you should always ask for confirmation from ATC if you have any doubt.

In aviation, whenever you receive an instruction that involves a complete reversal of the active runway (from 02 to 20), or if the phrasing feels ambiguous, it is standard radio phraseology and good airmanship to clarify. You can simply transmit: “[Your Callsign], confirm joining runway 20?” It is always better to double-check on the ground or in the air than to risk a head-on conflict with traffic using the opposite runway.

Ref Page 100 Cosgrove 8th Edition

The reactions of a 30-year-old pilot are generally better than a 60-year-old.

Why this is the case:

As part of the natural aging process, pure physiological reaction time—the speed at which the nervous system processes a stimulus and triggers a physical movement—gradually and progressively declines after early adulthood.

While older, experienced pilots frequently compensate for this minor lag with superior anticipation, better decision-making, and flight experience, their raw, split-second physical reaction times are statistically slower than those of a 30-year-old pilot.

Ref Page 98 Cosgrove 8th Edition

To avoid painful or dangerous results from pressure changes, you should never scuba dive while congested (with a cold or allergies) or fly too soon after a dive. Diving with blocked sinuses prevents your ears from equalizing, which can cause severe pain or eardrum damage called barotrauma. Furthermore, flying in an airplane too soon after a dive is dangerous because the drop in cabin pressure can cause residual nitrogen gas in your blood to expand into painful bubbles, leading to decompression sickness (“the bends”).

No, it does not usually preclude you from flying.

Treatment for high blood pressure (hypertension) is very common among pilots. As long as your blood pressure is well-controlled and the medication you are taking is “approved,” you can usually maintain your medical certificate.

CAA Document LINK

See page 99 of Brian Cosgrove (8th Edition)

Rapid breathing and tingling in the fingertips are primary signs of Hyperventilation.

In aviation, hyperventilation is especially dangerous because its symptoms are almost identical to Hypoxia (lack of oxygen). This can lead a pilot to make the wrong correction, which could make the situation worse.

Why it Happens

Hyperventilation is often triggered by stress, anxiety, or fear. It occurs when you breathe faster or deeper than the body needs, which “washes out” too much Carbon Dioxide (CO2) from your blood.

NHS LINK

Page 97 – Cosgrove 8th Edition

Ref Page 100 of Cosgrove 8th Edition

In the UK, the alcohol limit allowed in a pilot’s blood is significantly lower (much stricter) than the limit allowed for driving a car. It is essentially a zero-tolerance policy.

Here is how the blood alcohol limits compare:

• Pilots (Aircrew): The legal limit is 20 milligrams of alcohol per 100 millilitres of blood. This is a tiny fraction of a drink and is set strictly to account for naturally occurring alcohol in the body or minor ingredients in everyday products.

• Drivers: The legal limit for driving a car is 80 milligrams of alcohol per 100 millilitres of blood in England, Wales, and Northern Ireland, and 50 milligrams in Scotland.

Therefore, the legal alcohol limit for a pilot is one-quarter of the limit allowed for a driver in most of the UK (and less than half the limit for a driver in Scotland).