Confused by the existence of a charted displaced threshold in addition to a second; notamed; displac...

Narrative:

Before the flight I checked the notams and observed a NOTAM for a displaced threshold on runway 31 at sgj. I knew the flight was VFR and during daylight hours so I foresaw no issue with recognizing and abiding with a displaced threshold. After contacting st. Augustine tower I heard a radio discourse between the tower and an aircraft that had landed short of the displaced threshold on runway 31. Once runway 31 was in visual contact I made sure to identify what I believed to be the location of the displaced threshold. This location was marked with threshold markings. After landing past the threshold markings I was informed by the tower that I had landed short of the displaced threshold. I realized afterwards that there were actually two sets of threshold markings and I determined that I had in fact landed short of the intended area for landing. Later observation revealed faded chevrons leading up the second threshold. These markings are conflicting and reflect an unclear representation of the usable runway available for landing. I determined that corrective actions in my situation would have been to better verify the actual threshold position with tower after noting the previous pilots mistake. In addition; I should have taken a more careful note of all markings on the runway before landing. Also an ideal fix would be clearer markings on the runway to prevent other aircraft from landing short in the future.

Original NASA ASRS Text

Title: Confused by the existence of a charted displaced threshold in addition to a second; NOTAMed; displaced threshold; the pilot of a C-152 landed short of the second of two active displaced thresholds.

Narrative: Before the flight I checked the NOTAMs and observed a NOTAM for a displaced threshold on Runway 31 at SGJ. I knew the flight was VFR and during daylight hours so I foresaw no issue with recognizing and abiding with a displaced threshold. After contacting St. Augustine Tower I heard a radio discourse between the Tower and an aircraft that had landed short of the displaced threshold on Runway 31. Once Runway 31 was in visual contact I made sure to identify what I believed to be the location of the displaced threshold. This location was marked with threshold markings. After landing past the threshold markings I was informed by the Tower that I had landed short of the displaced threshold. I realized afterwards that there were actually two sets of threshold markings and I determined that I had in fact landed short of the intended area for landing. Later observation revealed faded chevrons leading up the second threshold. These markings are conflicting and reflect an unclear representation of the usable runway available for landing. I determined that corrective actions in my situation would have been to better verify the actual threshold position with tower after noting the previous pilots mistake. In addition; I should have taken a more careful note of all markings on the runway before landing. Also an ideal fix would be clearer markings on the runway to prevent other aircraft from landing short in the future.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	908865
Time
Date	201009
Local Time Of Day	1201-1800
Place
Locale Reference	SGJ.Airport
State Reference	FL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	None
Person 1
Function	Single Pilot
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 800 Flight Crew Type 30
Events
Anomaly	Ground Excursion Runway

Confused by the existence of a charted displaced threshold in addition to a second; notamed; displaced threshold; the pilot of a C-152 landed short of the second of two active displaced thresholds.