Radio Aids

Question 1

PBN definition

Question 2

RNAV definition

Answer 2

Method of navigation that permits aircraft operation on any desired flight path within the coverage of ground or space based navigation aids or combination of these

Aircraft meet requirements of RNAV, a specified nav accuracy must be met 95 per cent of flight time

Question 3

GPS:

Answer 3

Space-based radio nav system
24 satellite constellation is designed to ensure at least 5 satellites are always visible to a user worldwide - minimum 4 necessary for user to establish accurate three dimensional position

Question 4

RAIM definition and brief description

Answer 4

Receiver Autonomous Integrity Monitoring

• capability of GPS received to perform integrity monitoring on itself by ensuring available satellite signals meet integrity requirements for a given phase of flight - without RAIM pilot has no assurance of the GPS positional integrity .
• RAIM provides immediate feedback to pilot
• This fault detection is critical for PBN and RNAV - because delays of two hours can occur before erroneous satellite transmission is detected and corrected by satellite control segment

RAIM requires 5 satellites or 4 and barometric altimeter input or FDE, 6 satellites or 5 with baro-aiding (allows GPS to isolate corrupt satellite signal)

Question 5

RNP - General and RNP operations overview

Answer 5

RNP is an RNAV system that includes onboard performance monitoring and alerting capability (e.g RAIM)
It’s a statement of navigation performance necessary for operation within a defined airspace

Question 6

Inertial Navigation System (INS)

Answer 6

Combine components of IRU with internal navigation computer.

IRU calculate position and velocity

Question 7

FMS