Dash 8 Series Undifferentiated or Other Model
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 7.0
Situational Awareness; Training / Qualification
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Airspace Structure; Company Policy; Procedure; Human Factors
I witnessed the event that took place on another sector. The controller vectored a [an aircraft] off the STAR for sequencing. When the controller achieved more than enough spacing; he turned the aircraft direct to a fix and issued them a descend via clearance. I thought the aircraft was direct to a different fix so I did not say anything. Issuing a descend via clearance from that location does not protect for the Minimum IFR Altitude. The controller should have issued a crossing restriction of 11;000 feet; then descend via. The controller needs more practice and is not safe to work on their own.
ZSE Center Controller reported they observed another Controller issue a clearance which placed an aircraft below the Minimum IFR Altitude.