PC Navtex Pro Application

What is Navtex?   Navtex is an international standard system for broadcasting maritime safety and navigation information using VHF TTY. Messages include weather forecasts and warnings, shipping hazards, and SAR information.

You need:        Nasa Marine Navtex receiver engine. All versions of the engine will work with this software, but only the latest version of the hardware supports all the facilities of the application. It uses a serial interface to receive data from the engine. this can be a serial interface cable, a USB serial interface, or even (if you are a bit technical) a serial bluetooth adaptor.

Platform:   Runs on Windows XP to Windows 10.

Status:         Currently at issue 4. Will not be further updated as as the VFP6 platform is obsolete.

Obtain from:    Ships free with the Nasa Marine Navtex engine on CD. If you need a download, email Willrite support.

Support:   Limited support available from


AIS Radar Application

What is AIS?

All shipping over a certain tonnage is required by maritime law to broadcast, on a fixed VHF frequency, their location, unique ID (MMSI), name and certain other data. Leisure marine craft may optionally broadcast thieir position and a subset of the "big ship" data.  Fixed safety installations such as lighthouses and marker buoys may also transmit their locations to aid navigation. The other notable class of AIS transmitters are emergency (SAR) beacons.  Typical range of ship transmitters is 30-50miles. If you have the appropriate receiver for this frequency, you can track and plot with a high degree of accuracy, the larger marine traffic around you, as well as many navigation beacons.. This application creates a circular plot on a computer screen with the received traffic data identified on it. Analysis of repeated data allows targets to be plotted to show their track (speed and direction) as well as current position.

You Need:            Nasa Marine AIS engine (see

            PC/laptop with serial port or serial-to-USB adaptor

           GPS device (serial output, either via USB or bluetooth)

Runs on:      Windows XP to Windows 10

Status:            The VFP6 platform is obsolete, so this product will not be updated

Available from:  Purchasable from as a CD

Support: If you purchase this application from Nasa Marine but need it as a download, contact me.