Cessna Citation Sovereign (C680)
Air Traffic Control Fully Certified
Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Human Factors; Procedure; ATC Equipment / Nav Facility / Buildings
Ten miles south of SUA there's obstruction at 1;000 FT MSL. I descended an aircraft to 1;500 FT; our MVA we use in this area should be 2;000 FT. The aircraft got a 'low altitude alert' and was at 1;900 FT descending as he was overflying the obstruction. I issued the low altitude warning and asked pilot to verify he was at 2;000 FT and pilot said 'no; you gave us 1;500 FT'. I told the pilot to climb to 2;000 FT and pilot decided to cancel IFR. Simply forgot the obstruction was there. It would be nice if there was a circle or a better way to highlight the obstruction on the RADAR map instead of just a little upside down V.
PBI Controller described an MVA loss of separation event when a descent clearance was issued; but not realized by the reporter; additional video map highlights were suggested.