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→Instrumentation
== Instrumentation ==
This section describes the functions, working principles, and possible sources of error for '''pressure instruments''' that a pilot may wish to understand. Instrumentation is examinable in the Bronze theory examination, so the reader may wish to discuss the contents with an instructor to reinforce the understanding.
The usual pressure instruments used in gliding include:
*Air speed indicator (ASI)
*Altimeter
*Vertical speed indicator or Variometer
A glider is equipped to measure the following pressures:
*Total pressure, by using a pitot tube
*Static pressure, by using a static port
*Inverse pitot pressure, by using a total energy tube (see later)
=== Air speed indicator ===