Definition
A portable EFB is an Electronic Flight Bag device that is not permanently mounted in the aircraft and can be carried in and out by the pilot. It is typically a tablet or laptop running aviation applications that display charts, approach plates, checklists, and other flight information. Because it is not installed equipment, it does not require FAA airworthiness approval, but its use must comply with operator authorization and procedures that prevent interference with aircraft systems and pilot duties.
Plain English
A tablet, laptop, or similar device the pilot brings into the cockpit to access charts and flight information, instead of using paper or a built-in screen. It belongs to the pilot, not the airplane.
Context Anchor
Seen in Electronic Flight Bag discussions, especially when comparing carry-on tablet-based systems with equipment built into the aircraft.
Derivation
Portable comes from the Latin portare, meaning to carry. The word emphasizes that this type of EFB is carried by the pilot rather than installed in the aircraft, which is the key distinction from a mounted or installed EFB.
Why Pilots Care
It gives pilots flexibility to use the latest information across different aircraft without needing permanent installation or certification.
Intuition Check
Portable does not mean “casual” or “uncontrolled” here. It means the EFB is carried into the aircraft and is not permanently installed, but it still has to be used safely and reliably during flight.
Example Sentence 1
She used her portable EFB to brief the approach plate before starting the engine.
Example Sentence 2
Before takeoff the crew updated weather data on the portable EFB while still in the briefing room.