# HSI Explorer — Aviation Education

> Aviation Education (iPhone/iPad app by David Spicer.)

- Source: https://appshunter.io/ios/app/hsi-explorer/id1662090064 (this page in markdown: same URL + `.md`)
- Developer: [David Spicer](https://appshunter.io/developer/1367501844)
- Category: Education
- Price: $8.99
- Age rating: 4+
- Requires: iOS 15.2 · 3 MB
- Languages: English
- Released: 2023-01-15
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/hsi-explorer/id1662090064/reviews.md

## What is HSI Explorer?

This highly effective training application was designed to provide a simple, yet immersive, experience in basic navigation instrument orientation from a STATIC perspective.  Whether you are an aviation student of any level or an Instructor Pilot seeking to teach your students, this application can be a critical link to creating a comprehensive understanding of aircraft and navaid orientation, instrument readout interpretation, as well as a walk-through tool for instrument navigation procedures.

This essential teaching tool is creatively centered around a typical aviation Horizontal Situation Indicator (HSI) along with a pictorial representation of the aircraft’s orientation to the navaid and course selections.  On the HSI, any combination of navigational indicators to include both the Radio Magnetic Indicator (RMI) or Bearing Pointer (BP) and the Course Deviation Indicator (CDI) commonly found in aviation can be selected.  The pictorial map allows for hiding or showing the various orientation aspects as desired to validate an understanding of the aircraft’s position as well as wind effect.  Additionally, the application integrates the powerful ability to annotate and mark-up both the HSI and map while learning and teaching the various concepts and orientations.

Interfacing with the HSI is accomplished by utilizing either the easy-to-use dials or a digital keypad as per user preference.  Airspeed can be toggled through several common airspeeds, by tapping on the airspeed indicator, enabling a thorough grasp of wind effect on heading and track.


## Version history (last 2 releases)

### 1.1 — 2023-01-28

Corrected wind direction arrow.

### 1.0 — 2023-01-15

No release notes.

## More apps by David Spicer

- [T6B Systems & EPs](https://appshunter.io/ios/app/t6b-systems-and-eps/id1367501845)
- [OPS & EPs](https://appshunter.io/ios/app/ops-and-eps/id1435840618)
- [T-6B Visual Identification](https://appshunter.io/ios/app/t-6b-visual-identification/id1438174311)
- [D-IFG (TW-5)](https://appshunter.io/ios/app/d-ifg-tw-5/id1482696044)
- [T-6 Electrical System](https://appshunter.io/ios/app/t-6-electrical-system/id1549394537)
- [T-6B Checklist Trainer](https://appshunter.io/ios/app/t-6b-checklist-trainer/id1615233903)

All apps by David Spicer: https://appshunter.io/developer/1367501844

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*