# AIS Radar — View AIS information

> Marine AIS data viewer with radar display and collision avoidance warnings. (iPhone/iPad app by Guenter Obiltschnig.)

- Source: https://appshunter.io/ios/app/ais-radar/id425345530 (this page in markdown: same URL + `.md`)
- Developer: [Guenter Obiltschnig](https://appshunter.io/developer/425345533)
- Category: Navigation, Utilities
- Price: $6.99
- Rating: 4.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 3 MB
- Languages: American English
- Released: 2011-03-21
- Data updated: 2026-08-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ais-radar/id425345530/reviews.md

## What is AIS Radar?

AIS Radar displays AIS (Automatic Identification System) data received from marine AIS transponders/receivers such as the ExNC 101, Weatherdock easyAIS or Digital Yacht, over a WiFi network. For AIS devices without built-in WiFi support, an external serial-to-WiFi adapter such as the SEAMate1A® Lite, the Brookhouse iMux, the Roving Networks RN-370 or the Digi Connect® Wi-SP can be used. Alternatively, the application can display AIS data received from public internet AIS feeds such as the San Francisco Exploratorium.

IMPORTANT: Please note that you will need to have an AIS transponder or receiver device capable of sending AIS data over a WiFi connection. Please see the Support Website for information regarding supported devices and setup tips.

Features include:
* Radar PPI-like display of AIS targets with course/heading and speed information.
* Selectable display range.
* Symbols for different targets (vessels with AIS class A and class B transponders, SAR aircraft and navigation aids).
* Computes closest point of approach (CPA) and time to closest point of approach (TCPA) for AIS targets.
* CPA/TCPA warning: The app will warn if the CPA (distance) or TCPA (in minutes) of another vessel is below a specified minimum.
* Tap to select targets, double-tap to display detailed information about selected targets.
* Pinch gestures and +/- buttons to change display range.
* Different radar display modes: Heading Up, Course Up and North Up.
* Optionally hide slow moving (or non-moving) targets from Radar view.
* List and detail views for AIS targets, displaying all available information about a target in clear form.
* Viewer for AIS safety-related broadcast messages.
* Supports iPhone and iPad, in portrait or landscape orientation.
* AIS/NMEA data can be received via a TCP connection or UDP.

DISCLAIMER: This application is no replacement for professional marine equipment. Always adhere to the principles of good seamanship and use proper caution and common sense when commanding a ship.

## Key features

- Radar PPI-like display of AIS targets
- Calculates CPA and TCPA
- CPA/TCPA warning system
- Selectable display range
- Different radar display modes
- List and detail views for targets
- Viewer for AIS safety messages

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/ais-radar/id425345530/reviews.md

### 5/5 — Useful back up

*2025-06-03*

I have an “old” Digital Yacht AIS receiver but the WiFi link won’t work with “new” iPhones.  It also has an NMEA 0183 output.   Connected this to a WiFi bridge (Yakker, eBay) then to this app on my iPhone (SE2020).    App works perfectly.   Used as a back up to my main Garmin chart plotter.    Good App, thank you .

### 4/5 — Nice clean AIS app

*2018-10-22*

Have you considered adding CPA and guard range alarms?

## Frequently asked questions about AIS Radar

### What is AIS Radar?

AIS Radar is a paid application that displays Automatic Identification System (AIS) data from marine vessels. It provides a radar-like view of nearby ships, their courses, speeds, and calculates potential collision points.

### How does AIS Radar get AIS data?

AIS Radar can receive data over a WiFi network from AIS transponder/receiver devices, or from public internet AIS feeds. An external serial-to-WiFi adapter may be needed for some AIS devices.

### What devices does AIS Radar support?

AIS Radar is available for iPhone, iPad, and iPod. It supports both portrait and landscape orientations on these devices.

### Is AIS Radar free to use?

No, AIS Radar is a paid application. It is priced at $6.99 and does not contain advertisements or in-app purchases.

### Does AIS Radar have ads?

No, AIS Radar is ad-free. As a paid application, it does not display advertisements to users.

### How often is AIS Radar updated?

The latest version of AIS Radar is 3.1, which was last updated on April 12, 2020. Users can expect updates to maintain compatibility and potentially add new features.

### What are the main features of AIS Radar?

Key features include a radar PPI-like display, selectable display range, target symbols, CPA/TCPA calculations with warnings, and different radar display modes like Heading Up and Course Up.

### Is AIS Radar suitable for professional marine use?

The application includes a disclaimer stating it is not a replacement for professional marine equipment. Users should always adhere to good seamanship principles and use proper caution.

## Version history (last 5 releases)

### 3.1 — 2020-04-12

Improvements to the user interface, specifically with CPA warnings, and a few minor bug fixes.

### 3.0 — 2020-04-10

AIS Radar 3.0 now supports CPA/TCPA (Closes Point of Approach/Time to CPA) warnings: the app will warn you if you get too close to an approaching vessel. This feature can be enabled in Settings, and the minimum CPA (distance) and TCPA (time in minutes) can be specified. 
Furthermore, the app adds support for newer iPhone and iPad models, as well as dark mode. A couple of minor improvements and bug fixes have also been done, and the code has been modernized.

### 2.3 — 2016-01-14

Version 2.3 of AIS Radar can now receive AIS/NMEA data via UDP in addition to TCP. Furthermore, AIS Radar now supports the bigger display of the iPad Pro.

### 2.2 — 2015-10-09

This version fixes a crash on iOS 9 when double-tapping a single target on the Radar screen.

### 2.1 — 2015-06-17

Support for displaying AIS SART targets.
Fixed an issue where the application was not able to obtain the current position using the device's built-in GPS/GNSS receiver if configured to do so.

## Apps similar to AIS Radar

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Marine Radar](https://appshunter.io/ios/app/marine-radar/id834243448) | 2.7 (12) | Free | Navigation |
| [TZ iBoat – Marine Navigation](https://appshunter.io/ios/app/tz-iboat-marine-navigation/id1312769833) | 4.7 (871) | Free | Navigation |
| [C-MAP: Boating](https://appshunter.io/ios/app/c-map-boating/id967289980) | 4.5 (2,347) | Free | Navigation |
| [Aqua Map Boating](https://appshunter.io/ios/app/aqua-map-boating/id919552329) | 4.7 (13,587) | Free | Navigation |
| [Navionics® Boating](https://appshunter.io/ios/app/navionics-boating/id744920098) | 2.9 (2,321) | Free | Navigation |
| [Boat Beacon](https://appshunter.io/ios/app/boat-beacon/id494877039) | 4.6 (854) | $14.99 | Navigation |

## Related topics

[ships radar](https://appshunter.io/ios/topics/ships-radar) · [iais](https://appshunter.io/ios/topics/iais) · [marine radar](https://appshunter.io/ios/topics/marine-radar) · [ship radar 24](https://appshunter.io/ios/topics/ship-radar-24)

---

*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 2026-08-23.*