What the paper testsThe same syllabus, held to a higher standard
ATPL General Navigation asks the CPL questions with less help. Data is given less directly, intermediate steps are not signposted, and answer options are spaced closely enough that a rounding shortcut will land you on a wrong one.
Working accurately therefore matters as much as working fast.
Why it is its own subjectDGCA examines ATPL in three parts
ATPL is not one combined paper. General Navigation, Meteorology, and Radio Aids & Instruments are examined separately, so AIVR CPL holds them as three separate banks with three separate 100-question papers.
Your readiness estimate is tracked per subject, which is the only way to know which of the three is actually holding you up.
Where marks go missingTwo-step problems
Most lost marks are on questions where the formula was never the hard part: a departure that first needs a mean latitude, a groundspeed that first needs a drift angle, a time that first needs a longitude conversion.
Every worked solution here shows the step you have to take before the formula, because that is the step candidates skip.
How to work through itUse the CPL bank as the foundation
If the CPL Air Navigation bank is not comfortable, start there — it is far larger and covers the same ground more gradually. Come back to this bank once the standard formulae are automatic.
Then sit the 100-question paper on the clock; three hours is a long sitting and pacing is its own skill.