Aviation Weather · Unit 5 of 5
SET AI Altimetry Drill
You fly at a constant indicated altitude from the departure field's altimeter setting into the arrival field's pressure — without resetting the Kollsman window. Work the SET AI sheet, then check each step. New numbers every problem.
Departure altimeter
Arrival altimeter
Assigned altitude (ft)
Arrival field elev (ft)
S — SituationWhich way is the pressure going?
E — Error1.00 in-Hg = 1,000 ft
T — True / MSL altitudeAssigned ± error
A — Absolute / AGL altitudeMSL − field elevation
I — Indicated altitude on deckField elevation ± error
From the Student Guide, Topic 1: a 0.10 in-Hg pressure change moves the altimeter reading 100 ft. Flying high → low pressure without an update, you are LOWER than indicated; low → high, HIGHER than indicated. Commit SET AI to your dump sheet.