An Electronic Flight Bag, or EFB, is a tablet or installed computer system that helps pilots manage flight information in the cockpit. It replaces many paper items such as navigation charts, airport diagrams, aircraft manuals, checklists, and performance tables. This matters because pilots need accurate information quickly while working in a busy, changing environment.
A well designed EFB reduces cockpit clutter and helps crews make safer, more efficient decisions.
Understanding Aviation: The Electronic Flight Bag
Not every cockpit tablet has the same role. Some are portable devices carried by the crew. Others are mounted and connected to aircraft power or data systems.
Aviation rules often group these systems by how permanently they are installed and what information they can exchange with the aircraft. A portable unit may be useful for reference and planning, yet it must not become a loose object during turbulence or an emergency landing.
A mounted unit needs secure hardware, suitable power, readable screens, and approval for its intended use. Airlines and operators set procedures that state which functions are allowed during each phase of flight.
The most important work often happens before the engine starts. Pilots use digital tools to check notices about closed runways, restricted airspace, navigation equipment, and airport hazards. They compare weather forecasts with reports from actual stations.
They calculate whether the aircraft can safely take off at its current weight. Hot air, high elevation, wet pavement, tailwind, and obstacles can all increase the runway distance needed.
A calculation is only as reliable as the inputs. Entering the wrong runway, weight, wind direction, or temperature can produce a convincing answer that is unsafe.
Moving map displays are helpful because they connect a chart to the aircraft's reported position. This can reduce navigation errors, especially near complex airports. Still, a position symbol is not permission to ignore the outside view, air traffic control instructions, or basic instrument skills.
GPS signals can be inaccurate, blocked, or affected by interference. Databases can be old. A map layer can hide important details if the display is cluttered or zoomed out too far.
Good pilots cross-check the route with charts, radio aids when available, aircraft instruments, and other crew members. They keep attention on flying the aircraft rather than staring at a screen.
Students can see the same ideas in everyday tablet use. A navigation app depends on battery power, location signals, current maps, and correct settings. In aviation, the consequences of a missing update or flat battery are much greater.
Crews plan for failures by carrying backup information, using independent power sources, and knowing how to continue without a digital display. They confirm that software versions and chart revisions are current before flight. Clear communication matters too.
One pilot may enter data while the other checks it aloud. This habit catches simple mistakes.
The central lesson is that digital tools support judgment. They do not replace careful planning, training, or responsibility.
Key Facts
- An EFB replaces many paper charts, manuals, checklists, and performance tables with digital documents and tools.
- Moving maps combine aircraft position, route, terrain, airspace, and weather layers to improve situational awareness.
- Distance, speed, and time are related by d = vt, so flight time can be estimated with t = d / v.
- Fuel required can be estimated with fuel = burn rate x time, then adjusted for reserves, alternate airports, and conditions.
- Performance calculations may include takeoff distance, landing distance, climb limits, runway condition, wind, temperature, pressure altitude, and aircraft weight.
- EFBs must be kept updated, charged, secured in the cockpit, and checked against approved aviation data sources.
Vocabulary
- Electronic Flight Bag
- A digital cockpit device or system that stores flight documents and provides tools such as charts, calculations, and moving maps.
- Moving map
- A navigation display that shows the aircraft position changing in real time over a digital map.
- Performance calculation
- A calculation used to determine aircraft limits and requirements such as takeoff distance, landing distance, climb ability, or fuel needs.
- Aeronautical chart
- A specialized aviation map that shows information pilots need, including airports, routes, airspace, navigation aids, and terrain.
- Situational awareness
- A pilot's understanding of the aircraft position, environment, weather, traffic, and upcoming decisions.
Common Mistakes to Avoid
- Treating the EFB as the only source of truth is wrong because pilots must verify critical information with approved data, cockpit instruments, and crew procedures.
- Using outdated charts or databases is wrong because airports, procedures, frequencies, and airspace rules can change and make old information unsafe.
- Entering aircraft weight, wind, or runway condition incorrectly is wrong because performance results depend strongly on accurate input data.
- Letting the tablet battery, mount, or screen visibility become an afterthought is wrong because an EFB must remain usable during vibration, glare, turbulence, and long flights.
Practice Questions
- 1 A flight route shown on an EFB is 360 nautical miles long. If the aircraft groundspeed is 120 knots, how many hours will the trip take?
- 2 An aircraft burns 9 gallons of fuel per hour. If the planned flight time is 2.5 hours and the pilot wants 45 minutes of reserve fuel, how many total gallons should be planned?
- 3 A pilot's EFB moving map shows a route around a thunderstorm, but the cockpit weather radar shows the storm is moving faster than expected. Explain why the pilot should compare multiple information sources before choosing a route.