Guidance after GS capture

Set missed altitude

After capture, set the published missed-approach altitude when appropriate.

Fly a stable ILS practice approach and confirm that LOC and GS are active.

ALTSEL after capture

Monitor the GS mode and the actual vertical deviation while the preselector shows the missed altitude.

FSS describes GS and GP as exceptions to ordinary ALTSEL limiting; its guidance says to set the missed altitude after capture.

Capture state

Verify that GS or GP is actually active, not merely armed, and discontinue the approach if the guidance is uncertain.