Can I use my easySPLIT also in conjunction with the easyTRX?

You need to use the easySPLIT OCB (OCB=operates class B) because of the following reason:If you use the easySPLIT there are connected the following devices: FM radio, VHF radio and AIS receiver. Only one of these units can physically also transmit, which is in this case the VHF radio. In the moment when the VHF radio is transmitting, the other connected devices must be disconnected very fast, so that the transmission power from the VHF is only going into the antenna and not into the also connected devices.Lets have a look now to a typical installation of the easyTRX. With the easySPLIT OCB there are following devices connected to the easySPLIT OCB: The FM Radio, the VHF radio and the easyTRX, which is a class B transceiver. There are two devices connected which can transmit. This means also, that the two connection paths of the VHF radio and the easyTRX must be monitored simultaneously. If one of the “transmitter” is transmitting, the other devices must be disconnected for this time period. This is the difference. With a standard AIS receiver it is sufficient to monitor one connected “transmitter” power entry pathes, with a class B transceiver, like the easyTRX two connected “transmitter” power entry pathes.

The answer is: Only one time, then it is broken. NO, you need to “upgrade” to another hardware, the easySPLIT OCB.

Other ships do not see my static data (name of the ship, type, dimensions, etc.). What is wrong with my easyTRX?

The easyTRX sends, like all other CLASS B units – position data and static data. It is mandatory when and how often these data has to be transmitted. In that point, there is no difference in Class B units.Position data (Msg.-type 18) are sent every 30 sec if you are faster that 2 kn, else it is sent every 3 min. The static data (Msg.-type 24) are sent every 6 min. It is always exactly 6 min; more often is forbidden. After switching on, it could last up to 6 min until the static data are visible to other ships.

Please make sure you entered your statistic data with the Link2AIS software. If you did not do so, the Msg.24 is “empty”. (You only have to program the easyTRX once; then the data remains in the unit).

Another reason for not being seen could be your antenna. All AIS Class B have a transmission power of 2 W. It could be that your antenna cable is too long with a too bad quality or your antenna is mounted to deep. The higher the antenna is mounted, the bigger is their range.

Which kind of data will be transmitted through the class B transmitter?

The class B transmitter, as you know, is a “light” version of the class A transmitter. The differences are:Class B: lower rate of telegrams (e.g. every 30s for a speed of 14kn, whereas for the class A transmitter it is every 10s). Does not transmit the IMO number or the call sign. Does not transmit ETA ordestination. Does not transmit the status of navigation. It is necessary to receive or transmit binary messages. Does not transmit if the the ship is turning. Does not transmit the draft.

Does the receiver support class B or is an upgrade necessary?

FAQ: easyAIS 2nd. Gen. >>>

Both versions of transmitters (A or B) are working with the same frequency and what is more important, they have the same transmission-protocols. The difference is the content of the telegrams, not the way the telegrams are transmitted.

Therefore our easyAIS is certainly able to receive class A and class B data. So this is not a problem.

Can the sportboat-ais-data (class B) switch on or off temporally by overload?

FAQ: easyAIS 2nd. Gen. >>>

It is possible with a special telegram.

The Message 22 by the class B AIS can stop temporally the transmitting a base station of a coast radio station. (It also can switch the transmitting telegram from all 30s to f.e. every 60min or even longer, if needed). The class A transceiver on the ships can not do that. Class A sender can not manipulate a class B sender. But there are difference ECDIS-electronic chart display information systems (norm EN61174) on the commercial shipments which does join with the class A AIS by it can inhibit the class b sender via filter function on the ECDIS display

Can the easyAIS Class B receive telegramm?

In the past we hear from several persons again and again, that the easyAIS cannot receive Class B telegrams. The only short and clear answer we can give is: It`s wrong.Please look again onto our homepage at the point: “AIS Capability”and read the difference between Class A and Class B transmitter. The telegrams and the frequencies are identical. If you receive a class A transmitter telegram, you also receive a class B transmitter telegramm. Do not be unsettled by such statements.

Summary: Of course, you can receive telegrams of a class B transmitter by an “easyAIS”!

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