Can you decipher the word NMEAAG

How can I delete / reset my MMSI?

The following instructions only apply to the easyTRX2 and easyTRX2S and their derivatives!

An independent reset by the customer is not possible / permitted.
For this reason, the following procedure is necessary every time the device is reset.
Either send to us or:

  1. Download the software from here.
    a. With this software we will log into your PC at a later point in time in order to reset the device.
    b. You can simply start the software; an installation is not absolutely necessary here.
    c. It is important that you see the following fields:

    Here is your ID and the password which we will need in the later step.
  2. Download the latest programming tool (only for Windows) for the easyTRX2 / or S from here
    a. link
    b. Unzip the ZIP file and start the installation / tool.
    c. If you have an older easyTRX 1st generation, please use the following programming tool Link
  3. Connect your easyTRX2S to power and then to USB to a free interface on the Windows PC.
    a. If the driver installation is successful, continue with 4)
    b. If Windows has problems installing the driver, you can download it here
  4. Start the programming tool from 2)
  5. Select the COM port, usually this is the highest (e.g. COM8)
    b. Select "Connect", a successful connection is indicated by the green bar with "connected".
    5. Start Teamviewer
    a. Tell us your ID and password (by phone or email), see step 1c)
  6. We then log into this PC and use the programming tool to reset your device to the factory settings.
  7. Then you can enter the ship data again and independently.
    a. The same applies here: entering the MMSI is only possible once.
    If you make a mistake here, we have to carry out the same procedure again.

Why am I not received on Vesseltracker / Marinetraffic / etc.?

There can be several reasons for this!

Among other things, it is possible that you are outside the reception range of the receiving stations.

It can also take some time for your signal to be integrated into Vesseltracker, Marinetraffic, etc. The presentation on these websites is - if used free of charge - not live!


In order to check whether you are being received, it is best to speak to the ships in your area with your radio and ask there explicitly whether your device is visible on their AIS screen (but not the ship neighbors 1 meter away, there there may be an overload here, which means that you cannot be seen).

How do you switch off the transmission of the easyTRX 1st Gen. when you are in areas where you do not want to reveal your position?

easyTRX 1st generation >>>

This operating mode is called “silent mode”.

Connection as follows:
4 cable strands lead out of the device. 1x power, 1x data for plotter, 1x data for PC, 1x external switch.
The wiring harness for the external switch is 2-pin, black and purple. If the cables are short-circuited, i.e. connected via a switch, the easyTRX is in pure receive mode.
With this switch it is then possible to change between transmit / receive mode (switch not closed) and pure receive mode (switch closed).

What do I need if I just want to send with an easy TRX?

easyTRX 1st generation >>>

So that the easyTRX can transmit, you need your own GPS antenna for the position calculation as well as the VHF antenna to be able to transmit it.

Both antennas are therefore dependent on each other, because I cannot transmit these out without first determining my position.

Now all you have to do is program the MMSI, callsign, length & latitude into the easyTRX.

If you do not want to display the AIS data, just ignore the data output and do not connect it to the plotter / PC.

My easyTRX does not send its position. I get the position data from everyone else, so the reception is fine, only the sending is not.

easyTRX 1st generation >>>

For the test I connected a Raymarine C70 to the easyTRX as well as a C120.
First you should check whether you have entered the dimensions A, B, C, D in the easyTRX software. Some plotters need this in order to be able to display ships on the screen.

In addition, the problem could be due to:
Raymarine C70 and C120 may be using old software that is unable to decode Class B AIS messages (recreational boating). They only indicate Class A AIS (commercial shipping).
Please update to version> 4.29. This can show Class B AIS!
If you switch on the easyTRX and the green lamp is on (the yellow, red and blue LEDs must be off!), Then you have to wait 3-4 minutes for the easyTRX to transmit.

Simply speak to an AIS ship in your area with your radio device and see whether it can see you on its AIS plotter.

My Raymarine plotter shows a “VSWR error” on a regular basis. What's going on here?

easyTRX 1st generation >>>

If you have already changed the antenna and the error still occurs, the error will be in the plotter:
You need to know that the easyTRX regularly sends error messages. In each of these messages there is a "flag". This flag shows whether there is a real error or whether only a regular "internal check" has been carried out and this is the report about it.
If the flag in the error message is a "V", this means that the system has been checked, no error => V stands for verified.
If the flag in the error message is an "A", this means a real error => A stands for acknowledge.
The plotter does not interpret the "error flags" correctly. It is likely to receive error messages and if those messages get too many (including AIS messages) it will display the errors (which in fact are not) just to free up space. We know this from the Raymarine plotter E120, which fixed the problem with the latest plotter software. Please check whether you have installed the latest version of the firmware software. Another possibility is to check whether the green LED on the easyTRX is lit. When it is lit, there are no “real mistakes”. Then it is a misinterpretation of the plotter! In addition, there is the possibility to see an alarm log in the easyTRX Link to AIS software in expert mode. There you can find out whether the alarm is a real one with an "A" or whether it is just a confirmation that it is not an alarm with a "V". Please check that.

Is the easyTRX isolated?

easyTRX 1st generation >>>

The housing of the easyTRX is insulated, whereas the VHF and the GPS antenna shield are connected to the negative pole of the battery.
RS232 refers to the negative battery pole
RS422 is isolated.

Ships that are more than 7-8 nautical miles away are shown to me with a symbol and the MMSI number, but no further details. When these ships approach, additional information appears, such as the boat name, etc. Is that normal?

easyTRX 1st generation >>>

What you are observing is completely OK and normal too.
This is due to the difference between the dynamic and static data. There are currently 24 different message types in the AIS radio network.

The dynamic data of the Class B AIS are sent in telegram type 18, the static data in type 24. Regardless of the type, the length of each telegram is 25ms. All telegrams are checked for completeness inside the easyTRX. If the checksum is incorrect, the telegram will not appear on the plotter screen.

Dynamic data type 18: If you drive faster than 0.1kn, the message is sent every 30 seconds, otherwise every 3 minutes. Dynamic data are: MMSI, speed, position, course, time, true heading.
Static data type 24: Regardless of the ship or its speed, the static data are transmitted every 6 minutes. Static data are: MMSI, callsign, ship name, ship type, dimensions, location of the GPS antenna on the ship.

I only see myself as a symbol with an MMSI number. Further details are not displayed - what's going on here?

easyTRX 1st generation >>>

You have to check one important thing: Is all individual data stored in the Link2AIS software (Static Data Configuration)?
These data can only be transmitted once they have been entered and saved.
If your dealer has only saved the MMSI, but not all the other data, this is missing and therefore cannot be transmitted.

What is the 12 V alarm?

easyTRX 1st generation >>>

The 12 V alarm comes when the voltage drops below 9.6 V during transmission. When transmitting, the EasyTRX briefly draws around 2 A of current from the on-board network. Please check whether the supply line has a sufficient cross-section or is not too long.

Other ships do not see my static message (ship name, ship type, size of ship, callsign, etc.). Why is it?

The EasyTRX sends - like all other Class B - position reports and static reports. The Class B standard also stipulates when and how often this must send these messages.
So there is no difference in the behavior of Class B devices. The position reports (Msg.-Type 18) are sent out every 30 seconds if you are driving faster than 2 kts, otherwise it is every 3 minutes.
The static messages (Msg.-Type 24) are sent out every 6 minutes. It is always exactly 6 minutes; more often is not allowed. So after switching on the device it can take 6 minutes until the static data is visible on the other ships. (The dynamic ones are usually more quickly visible, that also depends on how quickly a GPS fix is ​​there (green LED is on).
Please check whether you have entered the static data with the Link2AIS or the programming tool.
If you have not “fed” the EasyTRX with the data, only “empty” static data will be sent in Msg.24.
(You only have to program the EasyTRX once. The data is retained in the device forever.)
Another reason for not being seen by other ships could be poor antenna radiation.
The AIS Class B all have 2 W transmission power, which is also standardized. Bad radiation can result from too much attenuation in the antenna cable (very long cable with poor cable quality), or the RF coax connector is poorly assembled, or the antenna is installed too low; because the higher the antenna is mounted, the greater the range.
Please also note that the static data with the Msg. 24 can only be transmitted every 6 minutes.
So it can take a little longer for these to arrive on the other screens.
The other ship's plotter may also be very old and cannot yet evaluate Message 24.

I often see a "ghost ship" with my MMSI number nearby. Do the GPS Pos not agree?

easyTRX 1st generation >>>

This error is likely caused by the software in the plotter or PC. The EasyTRX always sends its own position in the form of a NMEA sentence via the interface. It is the sentence “VDO” (own AIS position report). The other destinations (ships) are sent to the plotter / PC with the sentence “VDM”.

We suspect that the plotter or PC software you are using makes no difference between VDO and VDM. An update can help here. The EasyTRX cannot suppress the VDO as it is prescribed by the standard.

Is the easyTRX software compatible with Windows XP / 7/8?

easyTRX 1st generation >>>

Yes she is.

Is it only sent if a ship is in the 30 nm zone or independently of it?

easyTRX 1st generation >>>

No, it is always sent. If you move your ship, every 30s., At anchor every 3min.

How high is the power consumption when actively sending or receiving?

easyTRX 1st generation >>>

On average 4W per hour. When sending, the easyTRX consumes a current of 2 amps for ~ 25msec.

Is the AIS transceiver prepared to receive weather data?

easyTRX 1st generation >>>

Yes and no. AIS is prepared to also receive weather information. But these are only sent to one place worldwide, on the St. Lawrence River in the USA, with the AIS data from the coast station. Therefore there is no weather reception via AIS.

Does the AIS software include an alarm function and does it work on the PC?

easyTRX 1st generation >>>

The so-called "proximity alarm" = "CPA alarm" comes from the interpretation of the received data, either from the plotter or from the PC. Since the easyTRX is "stupid" in terms of pure data interpretation, it cannot give a CPA alarm.

We have implemented this feature, the independent and plotter-independent calculation of the CPA / anchor alarm, from the easyTRX2 (2nd generation)!

Here we connect an additional output with the operating voltage - our easyCPA / ³ can then be operated and alarms in an emergency.


Does the AIS transceiver transmit even when the PC is switched off?

easyTRX 1st generation >>>

Yes, the easyTRX works completely independently. As long as the easyTRX is switched on, it receives and sends.

Is my navigation software AIS compatible?

First of all, some information: the easyTRX is “stupid” in terms of data evaluation on the PC. This is not done by the easyTRX, but by the PC and / or the plotter. The easyTRX is only very complex in terms of high-frequency data level reception and the implementation of high-frequency signals.
Since there are around 100 different navi software worldwide, it is unfortunately not possible to say exactly whether the software you are using is AIS capable.
In principle, however, many versions can be expanded to include the AIS function.
It is best to ask the software manufacturer directly whether your software supports AIS.

Police officers informed me that my AIS signal was not complete. My MMSI number will be transmitted, but otherwise you will receive an “Error R45”. The EasyTRX showed a green control light, so it worked perfectly. The data can be seen from other sailors (and also at / DEEQ). Where did the bug come from?

Most likely, this bug is from the Coast Guard software.
The AIS-Class B standard for sport shipping was adopted in 2006. We know that some older AIS Class A (commercial shipping) have problems with Class B broadcasts. It is a matter of time until the problems are resolved by software updates in the older Class A. If you are asked again about this topic, you can refer to the certification number of the Federal Maritime and Hydrographic Agency in Hamburg. The certification number of the EasyTRX can be found in the manual. It has the number: BSH / 46162/4320638/07.
It states that the device complies with the AIS Class B standard and may be operated.

With my AIS software, no static data such as ship name etc. are displayed in the AIS data, only those data sent by Class-A transponders. What can be the cause?

It can be due to 2 causes:

  1. Transmission frequency Transmission frequency of the Class B transceivers Dynamic information: Boats <2 kn: 3 minutes Boats> 2 kn: 30 seconds The static information such as the driving-specific information is transmitted every 6 minutes. After the specified time, the data is sent alternately on one channel (161.975 MHz) and then on the other channel (162.025MHz).
  2. Telegram type I almost assume that is the cause. The AIS standard stipulates that the telegram types 18 should contain the dynamic and 24 the static data of AIS Class B. Not every software or even plotter can "understand and interpret" message type 24. Class A: Message 1, 2, 3 & 5 (1, 2, 3 are the dynamic data, 5 is the static data!) Class B: Message 18, 24 (19 on request from a base station).

So either wait a little more patiently to see if static data is still coming, or ask the software manufacturer whether he can interpret "24", i.e. static data for Class B!

Which GPS antennas are suitable for operating the easyTRX?

easyTRX 1st generation >>>

Any GPS antenna that provides raw data is suitable. We have one in our range, our part number is A029. But as I said, any other with raw data also works.

Is there a software with an alarm system, e.g. in the event that another boat is on a collision course with me?

FAQ: easyTRX >>>

Usually every AIS-enabled chart plotter has an option to activate an alarm. This alarm is called "CPA" = closest point of approach. Most of the time, you can set the alarm to 5nm so that any boat that comes closer triggers the alarm on the plotter. It is exactly the same with most PC navigation software that is capable of displaying AIS. There should also be this option there.

If you are not using a plotter or software, I would recommend the “Yacht AIS” from Y-tronic.This software is very simple but very beautiful and shows you other ships on the radar screen and it also gives you an alarm on the PC when the ship is within your CPA range.


Would you like to alert your PC and software independently?

We have implemented this feature, the independent and plotter-independent calculation of the CPA / anchor alarm, from the easyTRX2 (2nd generation)!

Here we connect an additional output with the operating voltage - our easyCPA / ³ can then be operated and alarms in an emergency.

EasyTRX in use with a chart plotter that only has one NMEA input (most Raymarine models): I would like to operate the AIS TRX on my Raymarine C70 multifunction display. I would like to use the NMEA interface to which the GPS data has been fed in up to now.

The easyTRX is a Class B CS AIS transceiver. The easyTRX corresponds to the valid Class B standards and is certified by the BSH. All transciever certified by BSH are very similar. This is because the standards have to be met, which are sometimes very detailed and strict. The standards specify the type of housing, the EMC values, power supply, synchronization with the AIS radio network, channel access, channel status, displays, process types and procedures for adjacent channel suppression, spurious emissions, transmission power (all the way up to the user's shoe size.)

In this respect, the devices only differ in their design, the graphic surface for programming the MMSI and the basic application of the AIS displays. Also different are the "soft" factors, such as the detail of the manual, the completeness of the connection cables and necessary additional accessories up to the availability of useful additional devices such as Class B capable splitters and combined VHF / GPS antennas. In addition, of course, the service of the manufacturer and that is known to be the best with us!

All Class B transceivers have in common that they need their own GPS. This is necessary because the commonly available GPS antennas deliver NMEA GPS data. These NMEA data are generally not accurate enough with regard to the time base. A typical Class B AIS telegram takes 25ms. The Class B transceiver must deliver its "carrier" within the time of 1 ms. To ensure that sent telegrams do not overlap, each sender must adhere to a very precise transmission time. The sending time must be much more precise than the telegram. The transmission time is determined by the Class B transmitter with an accuracy of approx. 100µs. But this is only possible if this transmitter receives RAW DATA from the GPS antenna and no NMEA data, which are accurate to a maximum of 1/10 s. That is the reason.

For reliable operation, GPS data on an exact µs basis are required. From the above explanation it follows that you then need 2 GPS antennas. One for the NMEA data for the chart plotter and one for the easyTRX. That is unfortunately the case. You cannot connect the easyTRX with the data rate of 38400 baud and the GPS NMEA data record with 4800 baud to one interface of the C70. In your application you need a multiplexer that increases the 4800 of the NMEA GPS data to 38400.

Does your plotter support external GPS data via the NMEA interface, so you need NO second GPS antennas, because this data is sent via this interface together with the AIS targets.

Do I need my own GPS antenna for the easyTRX? I already have one for the chart plotter?

FAQ: easyTRX >>>
Please note that you need your own GPS antenna for a Class B transceiver. The ones that you already have on board are highly unlikely to work. The reason is as follows: The normal GPS antennas are "active" antennas that send out an already coded telegram (NMEA 0183). These telegrams are ideal for PC programs and also for chart plotters. However, these telegrams are usually only accurate to 1 second or 1/10 of a second. Unfortunately, this is far too imprecise for a Class B AIS transmitter. The time base for participation in AIS radio traffic must be accurate to 1 ms, i.e. 1/1000 of a second. Such an accuracy is only achieved if the GPS antenna delivers raw data to the Class B AIS transceiver, the easyTRX. The easyTRX then transfers the raw data to the exact time base. This is why you generally need your own GPS "antenna mushroom" to deliver the raw data to the easyTRX.

A customer would like to mount the combination antenna for the easyTRX in the top of the mast, e.g. at a height of 15 meters. Do you have a fixed installation solution for the cable extension?

FAQ: easyTRX >>>
Regarding the cable, we have the following recommendation / solution:
The existing cable is already 5m long. We tested the antenna combination VHF / GPS with an additional 10 meter cable. The final length of the cable was thus 15 meters. The additional cable was a simple RG58 cable. It had a male TNC plug and a female TNC socket as an extension adapter between the existing cable and the TRX.
The plugs were already pressed onto the cable. That worked very well. All satellites in our hemisphere were visible and we can 100% guarantee that a cable with 15 meters of RG58 cable will work properly. But as you also know, the better the cable, the better the reception and transmission.

Muting the easyTRX- I would like to be able to switch the device to silent using a toggle switch, how does that work?

FAQ: easyTRX >>>

It’s easy to do. We have already led out a 2-pin cable in the wiring harness that is intended precisely for this application. The cable colors are purple and black. If you short-circuit these cables using a toggle switch or something similar, the easyTRX goes into pure reception mode and sends your ship. and driving data are no longer available.


With the help of the programming tool, however, you can define another function - the sending of a security message. For this, however, you will need a button.

Connection to a chart plotter and pinching off the RS 232 connector. Is there another solution?

FAQ: easyTRX >>>

If the easyTRX is only used with a chart plotter, the simplest solution is to pinch off the connector and connect the cables directly to the chart plotter. (Red on NMEA input of the plotter, black on NMEA ground).

Do I need a marine radio certificate to install an easyTRX on my ship?

FAQ: easyTRX >>>

No. You can install an easyTRX on your ship. A marine radio certificate is not required for AIS transponders.

Do I need a new MMSI for my easyTRX?

FAQ: easyTRX >>>
If you want to operate a DSC radio system or the eaysTRX AIS transponder on a ship, you need a license for this marine radio station. You can get this from the Federal Network Agency. The Federal Network Agency will then send an MMS number to your maritime radio station, which you then program into the easyTRX. If you already have an MMSI and want to operate an easyTRX in addition, you must send a notification of change to the Federal Network Agency. You then program your existing MMSI into the easyTRX. You can get more information under the following link: Federal Network Agency Hamburg Branch Sachsenstr. 12 and 14 20097 Hamburg Tel .: 040 23655-0 Fax: 040 23655-182 E-Mail: [email protected]