Concepts

Interactive, visual explanations of the ideas pilots are tested on. Built to make the geometry click — move sliders, drag the aircraft, see what changes. Free for everyone.

Instruments

Compass Turning & Acceleration Errors

Why the magnetic compass misreads during turns and speed changes — the physics behind the ANDS and UNOS mnemonics.

Navigation

Holding Pattern Entries

How to pick the right holding entry — direct, parallel, or teardrop — from any arrival heading.

DME Arc Intercept and Tracking

How to intercept a DME arc cleanly, then hold it with the 10-degree heading-bug rule.

VOR Intercept & Reverse Sensing

How to intercept a VOR course cleanly, and why the CDI sometimes deflects the wrong way when the OBS is set to the reciprocal.