Aviation Charts Flashcards
Aviation charts are published by who in the UK
NATS
(National Air Traffic Services)
1:500,000 scale chart commonly shows all airspace below what flight level
FL195
1:500,000 scale chart is commonly referred to as what
HALF MIL
1:250,000 scale chart is commonly referred to as what
QUARTER MIL
REMEMBER: 25 is quarter of 100
Elevations are shown in reference to height above which datum
AMSL
(Above Mean Sea Level)
Elevations on a chart are not shown unless they reach ____ ft or more
500 ft
A man-made object that protrudes above the surface is known as what
OBSTRUCTION
4 examples of an obstruction that appear on aviation charts
- Masts
- Pylons
- Radio Towers
- Tall buildings
Obstructions are not shown on a chart unless they reach ____ ft from which datum
- 328 ft
- Above Surface
Tall obstructions over ____ ft from ____ datum have 2 figures shown against them
AMSL and ( AGL )
- 1000 ft
- AGL
Tall obstructions 1000ft or more above ground level have two figures shown.
The figure in brackets shows the height of the obstruction above ground level
What is MEF known as, and what datum is it referenced to
- MAXIMUM ELEVATION FIGURE
- AMSL
An MEF is marked on charts of each ____ min lat/long grid
30 min
The MEF for a grid is the higher of which 2 reference points
- Tallest obstacle
- Highest Terrain (plus 328 ft)
REMEMBER!!!: Highest terrain would include a clearning of 328 ft as obstacles are not referenced below 328 ft.
MEFs are rounded UP or DOWN to the next ____ ft
- UP
- 100 ft
3 chart features that mark designated areas of airspace where caution must be exercised
- DANGER
- RESTRICTED
- PROHIBTED
