Any Unknown or Unlisted Aircraft Manufacturer
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 17.0
Situational Awareness; Distraction
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance; Flight Crew Requested ATC Assistance / Clarification
Procedure; Aircraft; Human Factors
I descended an aircraft to 2700 feet. There is an obstruction at 2900 feet but at his rate of descent I always easily clear that antenna. The pilot asked if he was getting down to get under weather and I said no; it was to get under arrivals. Next thing I know he is below the Minimum Vectoring Altitude. I issued 2900 feet but he did not acknowledge. His rate of descent was extremely unusual and unexpected. I think he was hurrying down on his own in hopes of turning toward the airport. I told him I could not turn that close on an instrument approach so he went the long way. I think it would help if pilots told us they were doing a non standard rate of descent. I think I will never anticipate a standard rate again.
Air Traffic Controller reported descending an aircraft to an altitude below the Minimum Vectoring Altitude.