Challenger 300
Air Traffic Control Fully Certified
Situational Awareness
ATC Issue All Types; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Human Factors
Aircraft X was inbound to APF and I was vectoring for a RNAV approach for RWY 23 at APF. I descended the aircraft to 2100 and asked if he wanted the full approach or vectors. Looking at his altitude I did not think he would descend to below the MVA (Minimum Vectoring Altitude) prior to passing the obstacle so I issued a descent to 1600 and a turn to heading 320. Aircraft X descended faster than expected and was below the MVA while he appeared to be over the depicted obstacle. Aircraft X then called the field in sight and was cleared for the visual approach RWY 23 at APF.I will not assume a descent profile and just keep them above the MVA until I'm ready to clear the aircraft.
Fort Meyers Approach Controller reported anticipating an aircraft would not descend below the Minimum Vectoring Altitude; but the aircraft descended quicker than the reporter expected resulting in a MVA violation.