Narrative:

I received a NOTAM through AOPA member services about a tfr. I read the NOTAM and understood the tfr would be in effect from xa:30 through xd:15 local time.I understood the tfr extended to a 30 NM radius from the chs VORTAC. I read that flights at rbw would be affected. I used a NM plotter and sectional to measure the distance from the chs VORTAC to rbw and found that rbw was just outside the 30 NM radius. Thus; I assumed only flights arriving and departing to the east of rbw and penetrating the 30 NM radius was required to use the ATC services.previous tfrs at chs; had not included the rbw airport. I departed rbw approximately xc:35 local to the west. After flying westward for approximately 15 minutes; I turned back toward rbw.with a garmin GPS and distance measuring from the chs VORTAC; I carefully flew the pattern at rbw to ensure I did not penetrate the 30 NM radius for the tfr; and I landed back at rbw approximately xd:00. When I arrived at the FBO; I received a call from ATC informing me of a possible violation.it is my belief that I did not violate the airspace and I used due caution to avoid it. If I misunderstood the intent of this tfr; I sincerely apologize. I would never want to create an unsafe condition.I respectfully offer this observation; this tfr was ambiguous in that the airport I used (rbw) was not included in the 30 NM radius; yet the NOTAM stated it would be affected without clarifying how it would be affected. I would offer this suggestion. If an airport is mentioned in the NOTAM; clearly include all the airspace around that airport in the restricted airspace area. Thank you.

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Original NASA ASRS Text

Title: GA pilot reported researching a planned TFR and believe was successful in avoiding it; but was advised by ATC of a possible pilot deviation.

Narrative: I received a NOTAM through AOPA member services about a TFR. I read the NOTAM and understood the TFR would be in effect from XA:30 through XD:15 local time.I understood the TFR extended to a 30 NM radius from the CHS VORTAC. I read that flights at RBW would be affected. I used a NM plotter and sectional to measure the distance from the CHS VORTAC to RBW and found that RBW was just outside the 30 NM radius. Thus; I assumed only flights arriving and departing to the east of RBW and penetrating the 30 NM radius was required to use the ATC services.Previous TFRs at CHS; had not included the RBW airport. I departed RBW approximately XC:35 local to the west. After flying westward for approximately 15 minutes; I turned back toward RBW.With a Garmin GPS and distance measuring from the CHS VORTAC; I carefully flew the pattern at RBW to ensure I did not penetrate the 30 NM radius for the TFR; and I landed back at RBW approximately XD:00. When I arrived at the FBO; I received a call from ATC informing me of a possible violation.It is my belief that I did not violate the airspace and I used due caution to avoid it. If I misunderstood the intent of this TFR; I sincerely apologize. I would never want to create an unsafe condition.I respectfully offer this observation; this TFR was ambiguous in that the airport I used (RBW) was not included in the 30 NM radius; yet the NOTAM stated it would be affected without clarifying how it would be affected. I would offer this suggestion. If an airport is mentioned in the NOTAM; clearly include all the airspace around that airport in the restricted airspace area. Thank you.

Data retrieved from NASA's ASRS site 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.