Podcast
Questions and Answers
The average of high and low tides is termed as ______.
The average of high and low tides is termed as ______.
Mean Sea Level
[Blank] is the vertical distance from mean sea level (MSL).
[Blank] is the vertical distance from mean sea level (MSL).
Altitude
[Blank] is the vertical distance from a specific datum, for example, from the ground.
[Blank] is the vertical distance from a specific datum, for example, from the ground.
Height
[Blank] is the vertical distance of a point or a level on the surface of the earth from MSL.
[Blank] is the vertical distance of a point or a level on the surface of the earth from MSL.
Signup and view all the answers
The highest altitude below which an aircraft will always fly on local QNH is called ______.
The highest altitude below which an aircraft will always fly on local QNH is called ______.
Signup and view all the answers
[Blank] is the lowest Flight Level above which an aircraft will always fly on standard QNH 1013.2 hPa.
[Blank] is the lowest Flight Level above which an aircraft will always fly on standard QNH 1013.2 hPa.
Signup and view all the answers
[Blank] is the airspace between TA and TL.
[Blank] is the airspace between TA and TL.
Signup and view all the answers
Levels of constant pressure at or above the TL separated by a pressure interval corresponding to 500 ft are called ______.
Levels of constant pressure at or above the TL separated by a pressure interval corresponding to 500 ft are called ______.
Signup and view all the answers
The change of pressure with time is called ______.
The change of pressure with time is called ______.
Signup and view all the answers
The lines joining places of equal pressure change are called ______.
The lines joining places of equal pressure change are called ______.
Signup and view all the answers
Study Notes
Altimetry Definitions
- Mean Sea Level (MSL): the average of high and low tides
- Altitude: the vertical distance from Mean Sea Level (MSL)
- Height: the vertical distance from a specific datum (e.g., from the ground)
- Elevation: the vertical distance of a point or a level on the surface of the earth from MSL
- Transition Altitude (TA): the highest altitude below which an aircraft will always fly on local QNH
- Transition Level (TL): the lowest Flight Level above which an aircraft will always fly on standard QNH 1013.2 hPa
- Transition Layer: the airspace between TA and TL
- Flight Level: levels of constant pressure at or above the TL, separated by 500 ft (e.g., FL50 = 5,000 ft, FL300 = 30,000 ft)
- Pressure Altitude: indicated when the altimeter sub-scale is set to 1013.2 hPa
Pressure Tendency and Isallobars
- Pressure Tendency: the change of pressure with time
- In India, pressure tendency is calculated for the past 24 hours
- In higher latitudes, pressure tendency is calculated for the past three hours of the current observation
- Isallobars: lines joining places of equal pressure change
- Isallobars indicate areas of rising or falling pressure tendency
- Isallobaric Low: the region of greatest fall enclosed by isallobars
- Isallobaric High: the region of highest rise enclosed by isallobars
- Surface Lows are likely to move towards isallobaric low and intensify
- Isallobaric High indicates weakening of a pressure system
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Learn key terms in altimetry, including mean sea level, altitude, height, elevation, and transition altitude. Essential for aviation and geography students.
