Start immediately seeing marine traffic in your area! Just install an AIS receiver
and send us your data through any Internet connection.
Why cover my Area?
Am I located in a proper area?
What equipment and software do I need?
Can I avoid using a computer?
I am already using Shipplotter software. How can I contribute?
I already have a wideband or a VHF receiver. Can I use it to collect AIS data?
Put a Live map of your area in your web site
How much will it cost me?
Need Help?
Why cover my Area?
- Because you will use all functionalities of our site for free, for your area. Enjoy the real-time map, vessel tracks, ports traffic,
estimated arrivals and searchable historical data, at 3 steps.
- Because you will support an open 'community-based' project that provides free information for thousands
interested parties and many research applications.
- To put a live map of your area, showing all vessel movements, in your own web site!
- To include yourselves in the list of our sponsors. Ask us to acknowledge your participation in the project and to put a link to your personal or business web site.
- To experiment with antennas, area coverage and ship watching if ships and/or amateur radio excite you as much as they excite us.
Am I located in a proper area?
Any sea or inland waters area in the world can be covered and shown on the real-time map.
If you are located near an uncovered sea area (up to 10 miles from sea or more if at a high altitude), near a harbor or on top of a mountain (!) and you have a computer
and any Internet connection always online, then you may start installing your AIS station.
The most important factors (but not mandatory) for a good reception is the elevation (height from sea level – the higher the better) of your location and the clear view to the horizon, without obstacles.
What equipment and software do I need?
A typical base AIS station is shown on the picture above. Obtain and connect to your PC an AIS receiver with an
external VHF antenna and send the collected data through your Internet connection. In detail:
1. You need an AIS receiver.
You may buy one from a local marine electronics shop or you may order one from an online shop.
We have tested the following devices with our software, with similar results:
If you are not sure whether your location is suitable for AIS data reception and
thus you do not want to buy a device, we can lend you an AIS receiver unit, to try
it. You will have to return it to us within one month.
2. You need a VHF antenna.
Any marine VHF antenna is suitable for AIS reception. A 5/8 type antenna seems to be better for a base station
(see 1st picture). For a little better results you may get an high-gain VHF antenna (e.g. a 3 x 5/8 aerial) or
an antenna specially designed for AIS, such as the "
Shakespeare
396-1-AIS". Install the antenna at the
highest possible point of your building.
If you feel you can build your own handcrafted antenna, then you have many better options. Since in most cases the sea is not located around us but towards one direction, it is a very good idea to construct a directional (Yagi) antenna pointing to the sea (see 2nd picture). You can calculate the length of the antenna elements at this site:
http://www.k7mem.150m.com/Electronic_Notebook/antennas/yagi_vhf.html
(Remember to enter frequency 162 MHz). You may also try a
custom made "Collinear" AIS antenna.
: A 5/8 VHF Antenna
: An array of two Yagi AIS antennas
3. You need a cable and the relevant connectors to connect the antenna with the receiver. The best choice for this cable is the RG-213 type. If the distance is shorter than 5 meters you may also use the cheaper RG-58 type. In any case, the length of the antenna cable must be kept as short as possible.
You will also need a serial cable (a common RS-232 serial connection cable) to connect the AIS receiver with the computer. We have successfully tested a 15-meter serial cable, so we were able to place the receiver very close to the antenna, while the PC was 2 floors lower.
4. You need a software
You need to download for free a simple software for processing and uploading data to the central database.
It is a windows-based service program that runs on the background or in the foreground if you wish to keep an eye on it.
It requires the existence of the Microsoft .NET 2.0 framework (if you do not have it already, you will be prompted
to download it during the software installation).
Download the "AIS Logger" Software (zip file,
about 0.3 MB)
Installation Notes:Run the installation package AisServiceSetup.msi and follow
the steps until the end. The software requires
the Microsoft .NET framework, which will be downloaded during the installation if
you do not already have it.
A windows service will be installed (named AIS Logger).
Locate the service in (Right click) My Computer --> Manage --> Services. Configure
the service to start Automatically and start the service. If you wish to see the
AIS data collected and processed, check the option 'Allow service to interact with
the desktop' at the 'Log on' tab, before starting the service (if you do so, please
note that the program will stop when you log-off from windows).
That’s all! Start seeing vessels in your
area! Ask us to put in our our site a direct link to your area.
Can I avoid using a computer?
Yes! and this is the simplest and most robust solution, since you will not have to keep a PC and a software running. You will be also
able to place the receiver very close to the antenna, even if the network port is 100 meters away.
In order to process and send us your collected data without using a computer, you may use
a receiver with an 'Ethernet' interface, which connects directly to the network (see the receiver
COMAR SLR200Ν (~550 €).
Alternatively, if your receiver has a serial port, then you may use a serial-to-ethernet converter that collects
the data from the serial port of the AIS receiver and sends them
directly to our server. In both cases, it is not necessary to use a computer and the "AIS Logger" software to
send the collected data to the central server.
We have successfully tested the
'Digi One SP' Serial to Ethernet Converter (~ 150 €)
and the
'Netcom 10S' RS-232 to Ethernet Converter (~ 70 €)
The converter must be configured to send the data directly to the address '195.251.168.18', UDP port 5321.
Please contact us if you need further support on this.
I am already using Shipplotter software. How can I contribute?
If you have already a receiving station and you are using the
ShipPlotter software to process and publish your data,
then you may easily send us your data without interrupting at all your current setup. Just configure the ShipPlotter
to additionally send the data to our server.
Go to 'I/O settings' and locate the 'UDP peer-to-peer output section'. Enable the output to Remote IP '195.251.168.18',
Remote port 5321. That's all.
I already have a wideband or a VHF receiver. Can I use it to collect AIS data?
If you already have a wideband receiver or a marine VHF radiotelephone, it is possible to use it to collect
AIS data and send them to the central server, without buying a specialized AIS receiver.
You have to follow the steps below:
- Tune your receiver at one of the frequencies 161,975 MHz or 162,025 MHz (with FM modulation) or if you operate a VHF radiotelephone, tune it at one of the channels 87 or 88. If there is AIS signal reception, you will hear a ‘noise’ repeated at very short periods.
- Connect the discriminator output of your receiver to the input (line-in or microphone) of your computer (for more information on discriminator output of receivers see http://www.discriminator.nl).
- Install the software AIS_Monitor in your computer from here: AISMon_2.2.0.exe
(Thanks to Dave Houy: http://groups.yahoo.com/group/aismon/)
- Run the AISmon program, select the sound card of your PC and configure the UDP data output to 195.251.168.18:5351. See the ships you are receiving immediately on the real-time map!
Put a Live map of your area in your web site
If you wish, you may put a part of our map that covers your area in your own web site. It is
very easy to do this in three steps:
- Open the aismap.zip and import the two files into your web site. Your web server
must support .php files in order to display the vessels map correclty.
- Get a Google Maps API key for your web site from
http://code.google.com/apis/maps/signup.html and replace the key in the html
code of the aismap.html (open the file with a plain-text editor, e.g. notepad and locate the text:
<script src="http://maps.google.com/maps?file=api&v=2&key=ABQIAAAAVpWBOdzQFdT6gwzFE0A6...)
- Adjust the coordinates (the center of your area) and the zoom level for your area, in the link that opens
the map. The parameters are given in the URL, as shown in the following example:
http://syros-observer.aegean.gr/ais/aismap.html?centerx=23.6¢ery=37.9&zoom=11
- You may customize the page showing the map according to the style of your web site.
Please keep the link to MarineTraffic.com below the map, as shown in the example.
How much will it cost me?
We will not ask money from you and we will not give any money to you. This is an
open, academic, community-based project. You will have to buy your own AIS receiver (indicative
prices shown previously) and to spend not more than 80 euros for the antenna and
the cables. We assume also that you already have an Internet connection and a PC in case you are using an AIS receiver with serial interface
(anything with windows 2000, XP, Vista, with more than 256MB of RAM would be fine). In exceptional cases (e.g.
areas of special interest, installations on top of mountains, etc.) we will try to provide an AIS receiver from our own resources.
If however you are a vendor or merchant of AIS equipment, a donnation of equipment
(AIS receivers) will be more than welcome.
Need Help?
We can support you to build your AIS station. Do not hesitate to send us an email
at
marinetraffic@aegean.gr. You may
also find an answer in the
Frequently Asked Questions.
