Super King Air 300
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 40; Flight Crew Total 9100; Flight Crew Type 40
Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Flight Crew Returned To Clearance; Flight Crew Took Evasive Action; Flight Crew Became Reoriented
Human Factors
I was inbound on the ILS 13R approach descending from 3;000 feet inside of JABBS Intersection and was cleared to land on 13R. I misinterpreted my glide slope indication and believed that I was above the glide slope; but in fact was below it because I had not passed ROYCE Intersection yet (FAF). I descended below 2;000 feet early and received a low altitude alert from Hobby Tower. I immediately climbed back up and intercepted the glide path and continued inbound to a normal landing.I have recently transitioned into this aircraft and avionics system. It was my confusion in reading the glideslope indicator and loss of situational awareness that led me to believe I was high. More familiarity; vigilance and a better approach briefing to reinforce my situational awareness will prevent this from happening to me again. Hobby Tower assured me that there was no problem and I thanked them for their help.
BE-30 Captain reported ATC issued a low altitude on approach to HOU.