In the context of flight instruments, which of the following shows both roll and turn information?

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The turn coordinator is the instrument that displays both roll and turn information in an aircraft. This instrument uses a small airplane symbol that indicates the aircraft's roll attitude as well as a rate of turn indicator, typically a small white arc or markings on the instrument, that shows how quickly the aircraft is turning.

When the aircraft is banked to the left or right, the turn coordinator reflects this roll, showing the pilot the current angle of bank. Additionally, it indicates the rate of turn in degrees per second, helping pilots maintain proper turn coordination and ensuring that the turn is neither too steep nor causing undue side-slip. This is particularly useful for executing smooth, controlled turns during flight and for maintaining situational awareness.

The other instruments mentioned provide specific information that does not include both roll and turn aspects. The heading indicator simply shows the aircraft's current heading, without providing any information about the roll or turn rate. An altitude indicator displays the aircraft's altitude, while a vertical speed indicator indicates the rate of climbing or descending. None of these instruments give the comprehensive roll and turn data that the turn coordinator does.

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