Readers ask: What Does Hsi Stand For In Aviation?

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.

How do you read HSI indicator?

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 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 a slaved HSI?

The ST-180 Horizontal Situation Indicator ( HSI ) system combines a magnetically slaved gyroscopic compass with a VOR/Localizer and glideslope display. The resulting instrument display provides the pilot with a pictorial of the aircraft position and heading relative to the selected VOR/GPS or Localizer course.

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What makes an HSI easier?

By switching the HSI to GPS mode, the course needle and CDI indicate position relative to the GPS course. Any way you look at it, if you’re navigating by GPS, VOR, or making an ILS approach, an HSI makes the job easier, and that should mean a safer flight.

What is the purpose of HSI?

HSI’s mission is to investigate, disrupt and dismantle terrorist, transnational and other criminal organizations that threaten or seek to exploit the customs and immigration laws of the United States.

What is HSI mapping?

The horizontal situation indicator (commonly called the HSI ) is an aircraft flight instrument normally mounted below the artificial horizon in place of a conventional heading indicator. It combines a heading indicator with a VHF omnidirectional range-instrument landing system (VOR-ILS) display.

What is the meaning of HSI?


Acronym Definition
HSI Humane Society International
HSI Hang Seng Index
HSI Homeland Security Investigations (US Immigration and Customs Enforcement)
HSI High Speed Internet


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.

How do I read a CDI file?

In the CDI instrument, the radial indicator is a needle which is clearly visible on the top of the instrument.

  1. If the location of the aircraft is to the left off course, the needle deflects to the right.
  2. If the location of the aircraft is to the right off course, the needle deflects to the left.
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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 an HSI differ from traditional VOR indicators?

How does an HSI differ from traditional VOR indicators? The HSI display is automatically rotated to the correct position, which prevents reverse sensing. On final approach on the Santa Fe RNAV 28 procedure, you drift to the left of the centerline and turn to a heading to reestablish this course.

How does a magnetometer work aviation?

Magnetometers used in aviation measure the Earth’s magnetic field in order to show orientation. Absolute magnetometers are calibrated using their own known internal constants. Relative magnetometers must be calibrated by reference to a known, accurately measured magnetic field.

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