Chart symbols and their colours
Aircraft
This symbol is used if the heading is known either because it was part of the information in one message or derived from several consecutive messages that contained a position.
Colour of the Aircraft nose
- Brown aircraft is currently known to be descending
- Pale Blue aircraft is currently known to be climbing
Diamond
Position estimate based on Mlat result.
Triangle
This symbol is used to indicate a position in general terms.
Point up is used for an aircraft position.
Point down is used for Waypoints.
Colours
- Red Position based on ACARS message.
- Yellow Position based on real time Mode-S/ADS-B message.
- Orange Position based on delayed or expiring Mode-S/ADS-B message.
- Cyan Position based on HFDL message.
- Blue Next intended waypoint.
- Green Previous position based on ACARS AMDAR (weather) report.
- Magenta Waypoints based on ACARS flight plan message.
- White Position based on Mlat result.
The colour of the symbol is based on the first message with a position that was received for this aircraft.
e.g. if the first position was based on an ACARS message and subsequently Mode-S messages where received, the symbol colour will stay red.
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