VHF and MF/HF testing

For the testing of VHF and MF/HF radios, the test box can check DSC signals transmitted on any of the six distress frequencies on MF/HF and on VHF CH 70.

The test box can send either a GMDSS dis­tress signal (all ships call) or a selective test call addressed to a particular MMSI number. The calls can be sent on any of the 6 distress frequencies on MF/HF as well as on VHF CH 70. Furthermore, the test box can send and receive DSC signals on the interna­tional calling frequencies 2177.0 and 2189.5 kHz.

The test box measures and displays the mark/space frequen­cies of the received DSC-signals.

On VHF channel 6 and 8 the test box can measure the deviation on a recei­ved signal.

The test box is able to measure the transmitted and reflected power on any VHF channel, including CH 70, all Maritime MF/HF Bands (with optional accs. MF/HF Power Sensor) and also to test the sensitivity of the receiver part.

NAVTEX testing

For the testing of NAVTEX Receivers, the test box can send NAVTEX signals on 490 kHz,   518 kHz or 4209.5 kHz.

TELEX testing

For the testing of TELEX Receivers, the test box can send TELEX signals on 2.1745 MHz, 4.1775 MHz, 6.2680 MHz, 12.520 MHz and 16.6950 MHz.

EPIRB and PLB testing

The test box can also be used to check 406 MHz EPIRBs and Personal Locator Beacons, as it can receive and decode test calls on 406.025 / .028 / .031/ .037 /.040 MHz as well as receive the 121.5 MHz homing signal.


The test box is capable of testing AIS Class A transponders for vessels, aircrafts and shore stations as well as Class B Transponders by checking their ability of sending and receiving AIS data and by making frequency measurements and power measurements on CH 70, AIS channel 1 and AIS channel 2.

Furthermore, it is possible to check the GMDSS communication on CH 70 by requesting reports of the ship’s call sign, IMO number, name, type, dimensions, draught and destination, etc.

The test box is able to simulate ships appearing at four different positions, relative to the AIS transponder’s position.

The AIS test facility can also be used for the testing of AIS-SARTs, AtoN devices and        Man Over Board devices, as it can receive and decode test calls from these.

RADAR SART testing

For the testing of 9 GHz Radar SARTs, the test box measures the frequency of the response signals transmitted from the SART and will display the average frequency.