Acronyms

Question 1

What is this number?

Answer 1

MEA - Minimum Enroute Altitude

•Proper reception of navigational aids
•Two way communication with ATC
•Safe cearance or margin from the
obstacles
•Safe adherence to the ATC or local
procedures

Question 2

What is this symbol?

Answer 2

MRA- Minimum Reception Altitude

The lowest altitude on an airway segment where an aircraft can be assured of receiving signals from navigation aids.

MRA

Question 3

What is this symbol?

Answer 3

MCA - Minimum Crossing Altitude

The lowest altitude at which a navigational fix can be crossed when entering or continuing along an airway that will allow an aircraft to clear all obstacles and identify the intersection while carrying out a normal climb to the required minimum in route, IFR, altitude of the airway in question beyond the fix.

1.Allows you to clear obstacles
2.Allows you to receive navigational signals.

Question 4

What is this number?

Answer 4

MOCA - Minimum Obstruction Clearance Altitude

Minimum altitude for a route segment while providing for obstacle clearance

Guarantees:
•1000 FT Separation when the obstacle elevation is below 3000 FT

•1500 FT separation when the obstacle elevation is between 3000 FT and 5000 FT

•2000 FT separation when the obstacle elevation is greater than 5000 FT

• This may place in aircraft below reception altitude or navigational aid altitude

• assures 22 nautical miles VOR reception range

Question 5

TERPS

Answer 5

Terminal Proceedures Supplemental

Question 6

What does CDI stand for?

Answer 6

Course Deviation Indicator

Question 7

What does OBS stand for?

Answer 7

Omni-bearing selector