This Aerospace Recommended Practice (ARP) provides design
philosophies, guidelines, requirements, and a set of recommended
symbols, lines, and linear patterns for aeronautical information
presented on electronic flight deck display devices.
Specifically, this document addresses symbols, lines, and linear
patterns historically seen on aeronautical charts. It provides
recommended symbols for navigation aids, airspace boundaries,
missed approach holding patterns, etc. The document does not
address all aeronautical symbols, lines, or linear patterns, nor
does it provide specific recommendations about color, text and
fonts, line weight, or symbol size. Additionally, it does not
provide recommendations for non-aeronautical symbols such as
traffic or weather.
The general guidelines, recommendations and requirements are
intended to apply regardless of whether the display application is
intended for IFR or VFR operations and regardless of the type of
aircraft (14 CFR Part 23, 25, 27, or 29). The recommendations are
applicable to all electronic display applications within the flight
deck, regardless of where they are located, such as on:
• Electronic Map Displays (EMD)
• Electronic Chart Displays
• Electronic Flight Bags (EFB)
• Stand alone and Multi-Function Displays
• Navigation Displays (ND)
These recommendations also apply to symbols, lines, and linear
patterns that are generated in real time from individual elements
from an onboard database then overlaid onto a pre-composed image.
They are not intended to apply to the electronic display of static
pre-composed images in the form of a pre-existing graphic or file
image. However, that does not preclude manufacturers of
pre-composed images from using these recommendations.
There are permanent benefits to be gained from industry
standardization of the symbols specified in this document.
For any aircraft, when new symbols are introduced to an existing
function, they shall be compliant with this document. Upgrades to
existing fleets or displays that do not introduce new aeronautical
elements are encouraged but not required to comply with the
symbology requirements in this document.
These recommendations apply to two-dimensional displays. While
the recommendations in this document do not specifically address
3-D display symbology, the guidance and recommendations may also be
appropriate for 3-D displays.