Small Aircraft; High Wing; 1 Eng; Fixed Gear
Air Traffic Control Fully Certified
Human-Machine Interface; Situational Awareness
ATC Issue All Types; Inflight Event / Encounter CFTT / CFIT
ATC Equipment / Nav Facility / Buildings; Procedure
Aircraft reported clouds around 020 MSL and needed to get lower to see SUT. Second aircraft was also landing [at] SUT. I got ahead of myself in descending the second [aircraft] too soon. [I should have] referenced the 030 MVA along the route of flight. STARS system will be in place soon and the usage of [land] lines and much clearer maps on the [radar scope] will assist in avoiding MVA situations.
ILM TRACON Controller reported descending an aircraft too early and having it enter a lower Minimum Vectoring Altitude area.