Readers ask: What Is Hsi In Aviation?

How does an aircraft HSI work?

The HSI works by combining a VOR/DME receiver and an electrically-slaved heading indicator. (Not all HSIs are slaved but the HSIs in the Flight Simulator aircraft are.) The heading indicator shows the aircraft’s magnetic heading and its green pointer shows the course the pilot has selected.

How do you read HSI aviation?

In the HSI instrument, the TO/FROM indicator (yellow triangle) always points toward the VOR direction. The course radial indicator (black arrow) represents the radial direction from the VOR. The course deviation bar (red) is located exactly in function of the aircraft heading.

What is the difference between HSI and CDI?

A standalone CDI (Course Deviation Indicator) is an instrument that shows your deviation from a VOR radial that is selected using the OBS (Omnibearing Selector) knob located on the instrument itself. An HSI (Horizontal Situation Indicator) is an entirely separate instrument that combines a CDI and a heading indicator.

What information does the HSI provide?

The Horizontal Situation Indicator ( HSI ) is the panel mounted cockpit indicator that provides a comprehensive display including usually at least heading, course, and glide scope. The heading indicator of the HSI is a remote indicating compass that gets its information from a remote slaving transmitter.

What is slaved gyro?

[′slāvd ′jī·rō mag′ned·ik ′käm·pəs] (navigation) A directional gyro compass with an input from a flux valve to keep the gyro oriented to magnetic north.

What does slaved HSI mean?

The Horizontal Situation Indicator ( HSI ) instrument display combines continuously slaved aircraft heading information and VOR/LOC/GPS/GS displays in one unit.

What HSI means?

Homeland Security Investigations (US Immigration and Customs Enforcement) HSI.

What is Obi aviation?

Omni Bearing Indicator ( OBI ) – Used for VOR navigation and the cheapest way to do so, has a manual compass card that selects the desired VOR radial and a CDI needle to provide a steering aid to place the aircraft on that radial, with a “TO/FROM” indicator to resolve directional ambiguity.

What is the difference between a standard VOR and HSI?

On a conventional VOR indicator, left–right and to–from must be interpreted in the context of the selected course. When an HSI is tuned to a VOR station, left and right always mean left and right and TO/FROM is indicated by a simple triangular arrowhead pointing to the VOR.

What is VOR in aviation?

Description. The Very High Frequency Omni-Directional Range ( VOR ) is a ground-based electronic system that provides azimuth information for high and low altitude routes and airport approaches.

What is CDI and OBS?

A course deviation indicator ( CDI ) is an avionics instrument used in aircraft navigation to determine an aircraft’s lateral position in relation to a course. The OBS (Omni Bearing Selector) knob is on the CDI, it is not its own instrument.

How do you use an HSI?

With the HSI display, the pilot flies the aircraft towards the steering bar until the steering bar moves to the course selector. At that point you’re on the radial, so you turn the aircraft to the desired course.

How does a VOR work?

A VOR ground station uses a phased antenna array to send a highly directional signal that rotates clockwise horizontally (as seen from above) 30 times a second. It also sends a 30 Hz reference signal on a subcarrier timed to be in phase with the directional antenna as the latter passes magnetic north.

How does a CDI work aviation?

A course deviation indicator ( CDI ) is an avionics instrument used in aircraft navigation to determine an aircraft’s lateral position in relation to a course to or from a radio navigation beacon. If the location of the aircraft is to the left of this course, the needle deflects to the right, and vice versa.