What does a negative 'T' symbol inside a triangle indicate on aviation charts?

• A. Nonstandard weather minimums
• B. An advisory color code
• C. Nonstandard takeoff minimums
• D. Terrain caution area

Answer: (C)

A negative T inside a triangle flags nonstandard takeoff minimums. On IFR charts, some airports publish takeoff minimums that differ from the standard values, and this symbol tells you to look at the chart notes or Takeoff Minimums section to find the exact minimums for that departure. Those minimums could require higher visibility or a specific climb gradient than standard. It’s not about weather minimums, an advisory color code, or terrain cautions—the symbol specifically points to takeoff minimums being nonstandard and needing to be consulted in the chart’s notes.