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Attention exercise · ~2 min a run · free

Data Checking

Cross-check two flight-data tables and flag every mismatch.

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A filed plan sits beside the version loaded into the box. They should be identical, but some rows carry a single altered value: a transposed digit in a track, an off-by-one distance, a neighbouring frequency. Your task is to compare the two tables row by row and flag every row that does not match, before time and fatigue let an error slip through. It trains the disciplined cross-checking that keeps a loaded flight plan honest.

About this test

What this test measures

This measures clerical accuracy and cross-checking speed: how reliably you spot the one altered value between two otherwise identical data tables, whether a transposed digit, an off-by-one figure or a neighbouring frequency. It is the verification discipline that catches a mis-loaded route or a wrong readback before it becomes a problem in the air.

How to improve your score

  • Compare one column at a time from top to bottom, so your eye tracks a single value type rather than scanning busy rows.
  • Treat a missed error and a false flag as equally costly, because the score does, and read the value rather than trusting a glance.
  • Work up through the difficulties, since the harder tables hide the change in a single transposed digit that only a careful cell-by-cell read reveals.

Good to know

  • Technique: scan by column, not by eye

    Do not try to take in a whole row at once. Compare the two tables one column at a time, top to bottom, so your eye tracks a single value type (all the tracks, then all the distances). A changed digit jumps out far more reliably against a steady column than against a busy row.

  • What good looks like

    In our testing, a strong result is flagging every real mismatch while raising almost no false flags, even on Hard where the change can be a single transposed digit. If you are missing errors, you are scanning too fast; if you are over-flagging, you are trusting a glance instead of reading the value.

Frequently asked questions

What skill does data checking train?

It trains clerical accuracy and cross-checking: comparing two sources of the same data and catching the one value that does not match. Pilots do this constantly, verifying a loaded route against the filed plan, a readback against a clearance, and figures against a load sheet, where a single transposed digit matters.

How does difficulty change the task?

Easy uses smaller tables with obvious, large changes. Medium adds a column and mixes in subtler changes. Hard uses the widest tables with the most altered rows and the subtlest changes, such as a single transposed digit or a neighbouring frequency, so an exact cell-by-cell comparison is required.

Is this based on a specific airline or test-provider exercise?

No. Data Checking is an original SkyStudy exercise. It uses the same cross-checking concept found in several published clerical-accuracy and error-checking tests, but it is not affiliated with, licensed by, or derived from any specific test publisher or airline.

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