Movable stairway used for boarding?

• A. Jet Bridge
• B. Airstairs
• C. Steps
• D. Staircase

Answer: (B)

Movable stairway used for boarding is called airstairs. These are portable stairs that can be rolled up to an aircraft door, letting passengers walk from the ground into the cabin when a fixed jet bridge isn’t available. They’re designed for flexibility at remote stands or smaller airports, and can be self-propelled or towed into place. A jet bridge is a fixed or semi-fixed enclosed walkway connected to the terminal, not the portable stairs used at the aircraft door. Steps or a staircase are generic terms and don’t specify the mobile boarding stairs used in aviation.