Natural prolongation

The mechanic

A madd letter with no hamza and no sukun after it: the sound simply runs for its natural length, which is the unit every other madd is measured against.

Where it occurs

The three madd letters, with no hamza and no sukun after

ا و ي

Length, as reported

Two harakat is near-universally reported. It remains a convention of the teaching tradition, not a measurement.

A place in the text

إِيَّاكَ نَعۡبُدُ وَإِيَّاكَ نَسۡتَعِينُ

The marked spot was located in this ayah's own text at build time — Al-Fatihah 1:5.