Transport Canada Private Pilot Ground School Review

Vocabulary flashcards covering core topics from Canadian Private Pilot Licence ground school, including regulations, airspace, flight theory, aircraft systems, meteorology, flight operations, and navigation.

Troposphere

The lowest layer of Earth's atmosphere extending from the surface up to an average altitude of $36{,}000\,\text{ft}$ ASL, containing $99\%$ of atmospheric water vapor and where virtually all weather occurs.

Tropopause

The thin boundary layer directly above the troposphere that acts as an invisible lid trapping weather underneath, marking the exact point where air temperature stops decreasing with altitude.

International Standard Atmosphere (ISA) Sea Level Values

Standard atmospheric baseline values at sea level consisting of a temperature of $+15\,^\circ\text{C}$, a barometric pressure of $29.92\,\text{inHg}$ ($1013.2\,\text{hPa}$), and a standard lapse rate of $2.0\,^\circ\text{C}$ per $1{,}000\,\text{ft}$.

Dry Adiabatic Lapse Rate (DALR)

The rate at which unsaturated (dry) air expands and cools as it rises, or compresses and warms as it descends, equal to $3.0\,^\circ\text{C}$ per $1{,}000\,\text{ft}$.

Saturated Adiabatic Lapse Rate (SALR)

The rate at which saturated air (100% relative humidity) cools as it rises, equal to $1.5\,^\circ\text{C}$ per $1{,}000\,\text{ft}$ because latent heat released during condensation offsets expansion cooling.

Temperature Inversion

An atmospheric condition where temperature increases with altitude instead of decreasing, trapping moisture and pollutants underneath to produce poor surface visibility (fog or haze) and smooth flying conditions.

High Pressure System (Anticyclone)

A weather system characterized by outward, clockwise, and descending air motion in the Northern Hemisphere, generally producing stable air, fair weather, light winds, and reduced surface visibility.

Low Pressure System (Cyclone)

A weather system characterized by inward, counter-clockwise, and ascending air motion in the Northern Hemisphere, leading to unstable air, cloudiness, precipitation, and convective turbulence.

Pressure Gradient Force (PGF)

The atmospheric force resulting from pressure differences across distance, represented on weather maps by isobars where closely spaced lines indicate a steep pressure gradient and strong wind speeds.

Surface Wind Friction Effect

The atmospheric boundary effect where climbing out of ground friction causes wind to veer (turn clockwise) and increase in speed, while descending into ground friction causes wind to back (turn counter-clockwise) and decrease in speed.

Buys Ballot's Law

A meteorological principle stating that in the Northern Hemisphere, when a pilot flies directly toward a low-pressure area, the wind blows from the left, and when flying toward a high-pressure area, the wind blows from the right.

Altocumulus Castellanus (ACC)

Middle-level cumuliform clouds featuring turreted tops that signal instability in the middle atmosphere and indicate potential thunderstorm development.

Cumulonimbus Cloud (CB)

A massive vertical development cloud extending from bases near $1{,}500\,\text{ft}$ AGL to the tropopause, associated with severe hazards including extreme turbulence, heavy rain, lightning, hail, and icing.

Radiation Fog

Fog formed on clear, calm nights when ground radiation cools the earth's surface, cooling the adjacent air layer to its dew point under light wind conditions ($2\,\text{kt}$ to $5\,\text{kt}$).

Advection Fog

Fog formed when a warm, moist air mass moves horizontally across a cold underlying surface (such as cold water or snowpack), requiring moderate winds ($10\,\text{kt}$ to $15\,\text{kt}$) to mix the saturating layer.

Upslope Fog

Fog formed when stable, moist air is forced up rising terrain by wind, expanding and cooling adiabatically to its dew point as it ascends.

Steam Fog (Sea Smoke)

Fog formed when extremely cold air moves over warm water, causing moisture to evaporate into the cooler air and immediately condense into tiny water droplets.

Frontal Fog (Precipitation Fog)

Fog generated during a frontal passage when warm rain falls through a cold, dry air mass beneath, evaporating and saturating the lower atmosphere.

Cold Front

A steep, fast-moving frontal boundary ($20\,\text{kt}$ to $30+\text{kt}$) where dense cold air wedges under warm air, producing cumuliform clouds, heavy showery precipitation, sharp temperature drops, and a clockwise wind shift.

Warm Front

A shallow, slow-moving frontal boundary ($10\,\text{kt}$ to $15\,\text{kt}$) where warm air slides over retreating cold air, generating a widespread stratiform cloud sequence (cirrus, altostratus, nimbostratus) and continuous precipitation.

Clear Structural Ice

Heavy, smooth, hard ice formed by large supercooled water droplets ($0\,^\circ\text{C}$ to $-10\,^\circ\text{C}$) freezing slowly over an airframe, severely disrupting airflow and posing the most dangerous icing hazard.

Rime Structural Ice

Opaque, milky-white, brittle ice formed when small supercooled water droplets ($-10\,^\circ\text{C}$ to $-20\,^\circ\text{C}$) freeze instantly on impact, trapping air within the ice structure.

Mature Stage of a Thunderstorm

The most severe stage of a thunderstorm, initiated by the onset of surface precipitation where violent updrafts and downdrafts exist side-by-side, producing extreme turbulence, hail, and heavy icing.

Microburst

An intense, localized convective downdraft exiting a cloud base that lasts $5\,\text{min}$ to $15\,\text{min}$, producing vertical downbursts up to $6{,}000\,\text{ft/min}$ and wind shear shifts exceeding $45\,\text{kt}$.

Clear Air Turbulence (CAT)

Severe, unexpected turbulence occurring at high altitudes (typically above $15{,}000\,\text{ft}$ ASL) without visual cloud indications, caused by intense wind shear along jet stream boundaries.

METAR vs. TAF

A METAR is an observed surface weather report recorded at a specific time and location, whereas a TAF is a forecast predicting expected weather conditions within a $5\,\text{NM}$ radius of an aerodrome.

True North vs. Magnetic North Aviation Wind Rule

The standard rule stating that written wind directions in weather reports and forecasts (METAR, TAF, GFA, FD) are given in degrees True, while spoken wind directions from ATC or ATIS are given in degrees Magnetic.

Aviation Cloud Ceiling Definition

The height above ground level (AGL) of the lowest cloud layer reported as broken (BKN, 5 to 7 oktas) or overcast (OVC, 8 oktas); FEW and SCT layers do not constitute a ceiling.

Upper Wind Forecast (FD) High-Wind Speed Decoding

The decoding process for upper wind forecasts when wind speed is between $100\,\text{kt}$ and $199\,\text{kt}$: subtract 50 from the direction digits (codes 51 to 88) and add 100 to the speed digits.