What does TBAST stand for, and when is it accomplished?

What does TBAST stand for, and when is it accomplished?

• A. TAWS/Traffic Advisory, Base, ATIS, Squawk, Tower. Prior to entering Whiting Class-C airspace.
• B. TAWS/Traffic Audio, Base, ATIS, Squawk, Tower. Prior to entering Whiting Class-C airspace.
• C. TAWS/Traffic Audio, Base, ATIS, Squawk, Tower. When approaching Whiting Class-C airspace.
• D. TAWS/Traffic Audio, Base, ATIS, Squawk, Tower. Prior to leaving Whiting Class-C airspace.

Answer: (B)

TBAST is a pre-entry coordination sequence used before you enter Whiting Class-C airspace. It emphasizes making yourself traffic-aware and coordinating with ATC before you cross the boundary. The sequence you’ll follow is to broadcast Traffic Audio to inform others of your presence, establish base/ATC contact for entry, obtain the current ATIS information, set the assigned transponder code (squawk), and then contact the Tower. This order ensures you have current weather and airport information, are visible on ATC radar with the correct code, and have two-way communication established before penetrating the Class-C airspace. The option reflects that exact flow and the timing “prior to entering Whiting Class-C airspace,” which is why it’s the best choice.

TBAST is a pre-entry coordination sequence used before you enter Whiting Class-C airspace. It emphasizes making yourself traffic-aware and coordinating with ATC before you cross the boundary. The sequence you’ll follow is to broadcast Traffic Audio to inform others of your presence, establish base/ATC contact for entry, obtain the current ATIS information, set the assigned transponder code (squawk), and then contact the Tower. This order ensures you have current weather and airport information, are visible on ATC radar with the correct code, and have two-way communication established before penetrating the Class-C airspace. The option reflects that exact flow and the timing “prior to entering Whiting Class-C airspace,” which is why it’s the best choice.