Editing Flight instruments (section)

===Turn indicator===
{{main|Turn and slip indicator}}
;[[Image:Turn coordinator - coordinated.svg|left|100px]]
These include the Turn-and-Slip Indicator and the Turn Coordinator, which indicate rotation about the [[Aircraft principal axes|longitudinal axis]].  They include an [[inclinometer]] to indicate if the aircraft is in [[Coordinated flight]], or in a [[Slip (aerodynamics)|Slip]] or [[Skid (aerodynamics)|Skid]].  Additional marks indicate a [[Standard rate turn]].<ref name=faa/>{{rp|3-20 to 3-22}} The turn rate is most commonly expressed in either [[Degree (angle)|degrees]] per [[second]] (deg/s) or [[minute]]s per [[Turn (angle)|turn]] (min/tr).{{citation needed|date=October 2019}}