Lo Charts Flashcards
What do Lo charts primarily show?
- Radio aids
- Airways and airroutes
- Airspace
- Aerodromes
- Intersections
- Important Altitudes
What altitude do Lo charts go up to?
Start at the surface and go up to 17, 000 feet. Because Class A airspace starts at 18, 000ft and you’ll be with ATC up there so no charts required (I think)
What is the scale of a Lo chart?
It varies from chart to chart
What color is uncontrolled (G) airspace on a Lo chart?
Bright green
What color are bodies of water on Lo Charts?
Dark grey
Are air routes uncontrolled? What do they look like on a Lo Chart?
Yes
The air route and airway tracks on a low chart are in degrees magnetic, unless…
You are in Northern Domestic Airspace
How do you tell where NDA and SDA beings/ends on a Lo Chart?
A line with triangles. A ‘T’ will mark the NDA, since this is where all tracks will change to true instead of magnetic
If an airport is drawn in black on a Lo Chart what does that mean?
That it has an instrument approach. Airports that don’t have instrument approach will be drawn in green
What do the boxes in the red circles mean?
If this number is in a box as shown, it is the distance between nav aids. In this case, one is 105NM and the other is 252NM
Lo Charts don’t always tell us what class of airspace we are in when we are in controlled airspace, but what DO we know?
That we are at least in class E
What are some of the types of controlled airspace on Lo Charts?
- Low-Level Airways
- Control zones
- Terminal Control Areas
- Transition areas
- Control area extensions
What color is controlled airspace on a Lo Chart?
White
What can we tell about the airspace around this airport?
It has a Class E CZ (marked by the little green dashes)
The big white circle is a Class E transition one, so would be 700-2200AGL (typically)
How is Class B airspace depicted on a Lo Chart?
White hatching
What are the other min altitudes on other IFR Charts?
What is the MEA?
Min Enroute Alt (Given in ASL). In a Lo Chart this is the altitude needed to receieve all the signals and crap you need.
It will also meet MOCA (Min Obstacle Clearance) but only under ISA conditions. Which is never.
In the picture that is an uncontrolled air route with an MEA of 5400 feet. The distance between these two nav aids is 252NM.
What does this image from a Lo Chart tell us?
- MEA is 15000ASL (this is how high you need to be to recieve a signal from the old ass nav aids that probably arent there anymoe)
- MOCA is 2600ASL (this is the lowest I can go where I will be at least 1000ft above the highest obstacle)
- This is a controlled airway (because it is drawn in black) called Victor Airway 357.
Diagram of some stuff
What is AMA?
Area of Minimum Altitude, provides 1000ft of clearance in any given quadrangle? Same as on a VNC. WTF is a quadrangle, you ask? Its a rectangular box on the map that is, of course, different dimensions in different areas of Canada.
SDA: 2 lat by 4 long
NDA: 2 lat by 8 long
Why are an MRA and MEA different?
The MEA provides obstacle clearance. MRA provides reception altitudes only
Map of designated mountinous regions in Canada and their altitudes
