Airways, Air Routes, T-Routes

Question 1

Why is it important to recognize when you are flying in or thru airways or air routes?

Answer 1

Because it is controlled airspace. You may need to talk to someone and your WX minima will change

Question 2

What is a Low Level Airway?

Answer 2

• Controlled airspace that starts at 2200AGL and goes up to Class A (or whatever might overly it)
• In low level airways you should be monitoring 126.7
• Controlled airspace wx min apply. This is to give you more time to see and avoid IFR aircraft coming out of cloud

Question 3

On a VNC or VTS the boundary depiction on an airway or air route won’t always tell us the type of airway it is. What will?

Answer 3

Look for a centerline. This will tell us if it is a VHF/UHF, LF/MF, or T-Route airway.

Question 4

What is a VHF/UHF Airway?

Answer 4

A path from one VOR to another VOR. Also called a Victor Airway.

Question 5

What is important to remember about the base and center line of airways and air routes?

Answer 5

They start at 2200AGL. Which means their base and center line follows the rise and fall of the terrain underneath it.

So if you have a spot elevation of 500 ASL, you add 2200 to it to get the height ASL of the base of the airway.

This means if you are flying low level you may dip in and our of airroutes along your flight and you need to be aware of that.

Question 6

What is an LF/MF airway?

Answer 6

NDB to NDB or NDB to VOR. Becoming less and less frequent. Also begin at 220AGL.

Question 7

Why is one of these lines coming from this NDB airway thick black when the others are light blue?

Answer 7

Thick one indicates that at the other end is a VOR. The pale blue one is NDB to NDB.

Question 8

LO Chart info

Answer 8

Green and white hatched is Class B airspace

Question 9

LO Chart info

Answer 9

Green and white hatched is Class B airspace

Question 10

What are T-Routes?

Answer 10

• Shown on VNC with no centerline
• They are class E
• GPS nav instead of radio nav
• Unlike VHF and MF airways, T-Routes do not have a ‘splay’. They are just straight lines and are much wider.

Question 11

On a VNC, centerlines are not shown for T-Routes. Where would you find that info?

Answer 11

Lo Chart

Question 12

What is a Low Level Air Route

Answer 12

• NDB to NDB or NDB to VOR
• These are uncontrolled
• Class G
• Extend up from the surface to whatever airspace is above it.
• Lateral dimensions are the same as low level airways

Question 13

What is the difference between and Airway and an Air Route?

Answer 13

Airway is controlled and starts at 2200AGL

Air Route is Uncontrolled and starts at the surface

(T-Routes are airways)