View real-time Automatic Identification System (AIS)
data on your iPhone or iPad.

AIS Radar displays Automatic Identification System data received from marine AIS transponders or receivers such as the ExNC 101, Weatherdock easyAIS or Digital Yacht, over a WiFi network.

Radar PPI-like display

View the position, course, heading and speed of vessels and navigation aids on a radar-style display. The display range can be changed from 1 to 9 (iPhone) or 18 (iPad) Nautical Miles via buttons or pinch gestures. Detailed information about a target can be displayed by tapping it.

Flexible display modes

The radar display can be switched between North Up, Heading Up (based on iPhone/iPad magnetometer) and Course Up (based on AIS transponder data). Optionally, slow or non-moving targets can be hidden for a less cluttered display.

Detailed information about AIS targets

List and detail views for AIS targets, showing all available information for a target in clear form. Symbols and icons for different targets (vessels with AIS class A and class B transponders, SAR aircraft and navigation aids).

View safety-related broadcast messages

AIS Radar receives and stores safety-related broadcast messages, so you'll not miss important information for safe navigation.

Uses Wi-Fi to connect to AIS transponder/receiver

Works with AIS transponders/receivers with built-in Wi-Fi (such as Digital Yacht iAIS or Weatherdock easyAIS WiFi), or with any AIS transponder/receiver with a standard 38.400 bps serial AIS/NMEA data port connected to a serial-to-WiFi adapter.

Made by and for sailors

AIS Radar has been developed by an enthusiastic sailor, with love for detail and a deep understanding of the needs of those at the helm, whether on a sailing or motor yacht.

AIS Radar Technical Information

About AIS Technology

For a good introduction to AIS technology, please refer to the Wikipedia article on AIS.

Hardware Requirements

  • AIS Radar 2.0 and newer: iPhone 4S, iPhone 5, iPhone 5S, iPhone 6, iPhone 6 Plus, iPod Touch 5G, iPad 2, iPad Air, iPad mini or newer with iOS 8.0 or newer.
  • AIS Radar 1.2: iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5 and iPod touch with iOS 4.3 or later.
  • AIS Transponder or Receiver with integrated or external serial-to-Wi-Fi adapter. See below for a list of devices.

Feature Summary

  • 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.
  • 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.
  • Optimized for iOS 8

AIS Transponders and Receivers

Following is a list of AIS transponders and receivers that should work with the AIS Radar application. Please note that not all of these devices have been tested. Also, the list is certainly not complete.

Serial-to-Wi-Fi Adapters

The following serial-to-Wi-Fi adapters should work with the AIS Radar application. Generally, all serial-to-Wi-Fi adapters will work that support the AIS serial data rate of 38.400 bps and that provide the AIS data stream on a TCP port (UDP is not supported).

Setup Tips

AIS to Wi-Fi

  • Connect your serial-to-Wi-Fi adapter to your AIS transponder or receiver. AIS transponders/receivers have a serial port (RS-232 or NMEA 0183) with a transfer rate of 38.400 bits per second. Please consult your Serial-to-Wi-Fi adapter documentation for detailed set-up instructions.
  • Connect your iPhone to your serial-to-Wi-Fi adapter's wireless network (Settings > Wi-Fi).
  • Launch the AISRadar application and go to Settings > Network. If you have a Roving Networks serial-to-Wi-Fi adapter, Automatic Setup should automatically find the correct settings. Otherwise, turn off Automatic Setup and enter the IP address and port number of the serial port data stream. You can find this information in the documentation that came with your serial-to-Wi-Fi adapter.
  • Provided you receive AIS data (other ships with AIS transponders must be within range), you should see these ships on the Radar and Targets screens.


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.