Instrument Landing System(ILS)
Definition
A precision approach system providing lateral guidance via the localizer and vertical guidance via the glideslope. ILS enables approaches in very low visibility down to Category III autoland conditions.
Why Instrument Landing System Matters for Pilots
Navigation concepts like Instrument Landing System are tested on instrument rating exams and are essential for safe cross-country flying. Whether you are planning a VFR flight or navigating under IFR, a solid understanding of Instrument Landing System ensures you can find your way accurately and efficiently.
Exam Tip
This concept is commonly tested in navigation-related questions on FAA and EASA exams. Make sure you can explain Instrument Landing System in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.
Related Terms
Localizer(LOC)
The lateral guidance component of an ILS providing precise runway centerline ali...
Glideslope(GS)
The vertical guidance component of an ILS providing a descent path typically set...
Decision Height/Altitude(DH/DA)
The height during a precision approach at which the pilot must decide to land or...
Share this with a fellow pilot
Related Content
Lift
Aviation glossary definition and exam tips.
Relative Wind
Aviation glossary definition and exam tips.
Parasite Drag
Aviation glossary definition and exam tips.
ATPL Theory Complete Guide
Master every subject covered in airline pilot exams.
Free Practice Exam
Test your aviation knowledge with real exam questions.
Built by a commercial pilot
Pass your written for $39 — every track, 60 days
Instrument Landing System is one of 5,500+ exam topics in the All-5 Bundle: PPL / IR / CPL / ATPL / Part 107 / TAE. One-time payment, no subscription. Free 30-day extension if you fail your real exam.
Test your knowledge
Think you understand Instrument Landing System? Challenge yourself with practice questions covering navigation and all other exam subjects.
Try Free Practice QuestionsMore Navigation Terms
VHF Omnidirectional Range(VOR)
A ground-based radio navigation aid transmitting radials in all directions. Pilo...
Distance Measuring Equipment(DME)
A radio navigation system that measures the slant range distance between an airc...
Non-Directional Beacon(NDB)
A ground-based radio transmitter that broadcasts on low/medium frequencies used ...
Localizer(LOC)
The lateral guidance component of an ILS providing precise runway centerline ali...
Would you pass the real exam right now?
Take a free practice quiz — real FAA-style questions, instant score. No signup to start.
Take the free quiz →