You check in at the testing center, lock your phone away, and the proctor hands you a printed booklet of figures along with your scratch paper. For the commercial pilot knowledge test, that booklet is the testing supplement, and many questions on the screen will send you into it by figure number.
Candidates who have only studied from a phone app sometimes meet the printed supplement for the first time on test day. Those who have practiced with their own copy already know how the figures are laid out and spend their time on the problem, not the search.
ASA prints the FAA’s Airman Knowledge Testing Supplement for Commercial Pilot as CT-8080-1E.
Quick answer: The ASA-CT-8080-1E is the FAA Airman Knowledge Testing Supplement for Commercial Pilot, the collection of figures and reference material that commercial knowledge test questions point to. It’s for commercial pilot applicants who want to practice with the same reference used at the testing center, available on Skyfarer and at Skyfarer Shop.
Why own a copy
- Same reference as the test. Questions refer to figures by number, and those figures live in the supplement.
- Faster on test day. Familiarity with the layout saves time on every figure-based question.
- Study companion. Use it alongside a test prep book or software that references the same figures.
Good to know
The testing center provides the supplement on test day, so you don’t need to bring this copy. The FAA updates its supplements from time to time; before you buy, confirm the edition your test prep material and the current test use.
Pilot tip: Use sticky tabs on the figures you find yourself flipping to most often while studying. You can’t take your copy into the test, but the practice of finding them quickly carries over.
Where to buy
Airman Knowledge Testing Supplement for Commercial Pilot (ASA-CT-8080-1E) is sold by Skyfarer Shop. Find it on the Skyfarer marketplace or order directly from Skyfarer Shop. Either link shows the current price, shipping options and return terms.
Frequently asked questions
Is this the same supplement used at the test?
It’s ASA’s printing of the FAA Commercial Pilot testing supplement. Check that the edition matches the current test.
Does it contain practice questions?
No. It contains the figures questions refer to. Pair it with a test prep book or software.
Do I need to bring it to the test?
No. The testing center provides one.
