EASA ATPL062 radio-navigation foundations cheat sheet
EASA ATPL062 radio-navigation foundations · Keep the key ideas within reach.
Conventional radio aids and displayed guidance
A radial, bearing, selected course and aircraft heading are different quantities.
TO/FROM is not simply a report of aircraft nose direction.
DME is slant range, including the vertical component.
A pressure altitude is not automatically exact geometric separation.
Published instrument procedures take precedence over a generic display shortcut.
GNSS, augmentation and performance-based navigation
Position, accuracy, integrity and operational approval are different matters.
RAIM detection and fault detection/exclusion have different requirements.
SBAS, GBAS and conventional ILS are not interchangeable systems.
RNP adds onboard performance monitoring and alerting requirements.
A percentage accuracy statement is not an absolute containment guarantee.
Propagation, radar and surveillance
Line-of-sight formulas are theoretical models, not guaranteed service volumes.
Use consistent units and distinguish one-way from round-trip time.
Primary echoes and secondary transponder replies are different mechanisms.
ADS-B broadcast is not simply a reply to each radar interrogation.
Weather reflectivity does not show every turbulence hazard or prove a dark gap safe.