AIS TRANSPONDER TESTS

 

Set Number

As you may wish to test several transponders under the same MMSI, each transponder can be given its own individual set number for recognition. Default number is 1. Press OK to confirm or press ↑ or ↓ to change to another number. Then, press OK and go to the test you wish to perform.

 

Receive AIS sele

The test box is capable of decoding the following AIS messages:

MSG No.

Name of message

MSG No.

Name of message

1

Position report (Scheduled)

12

Safety related addressed msg.

2

Position report (Assigned)

14

Safety related broadcast msg.

3

Position report (Interrogated)

18

Class B position report

4

Base Station report

19

Class B extended pos. report

5

Static and voyage related data

21

Aids-to-Navigation (AtoN) report

9

SAR Aircraft position report

24

Class B Static data

11

UTC/Date response

 

 

 

In the Receive AIS sele test mode, the test box will receive the selected transponder’s MMSI number and AIS data, and at the same time measure the frequency and the forwarded and reflected power. The test can be performed on AIS1 and AIS2 respectively.

It is a requirement that the MMSI number registered in the test box is identical with the MMSI of the AIS transponder to be tested. Please check and change number, if required, using the Edit ship’s MMSI menu. See Page 12.

Select Receive AIS sele on the test box and press OK. Select AIS channel and press OK again to request for data. It may take up to 20 seconds until the AIS transponder transmits its data.

Test results are displayed line by line. You may toggle between the lines using ↑ and ↓ to view all the results. Results are also stored in the test box memory.

Use this setup:

 

The test box must receive AIS data on RF IN in order to start the power measurement. If the test box keeps waiting to receive for some time, it is likely because the AIS transponder is still waiting to transmit its data. Please note the transponder’s reporting interval depends on the ship’s speed. The lower speed, the longer interval. Reporting Intervals for ships at anchor or moored may be up to 3 minutes for each AIS channel.

You can check that the test box is able to receive AIS data from the actual transponder by requesting a Message 5. See page 33. Upon this request the transponder should respond within a few seconds.

Alternatively, use this setup:

Examples of Printout from the Memory:

AIS # 1,   Time/date: 07:25:56 / 26-09-2017
Message ID:  1 MMSI:  219557624
Position:  57d12.3732 N    9d41.0067 E   Pos. accuracy: 0   Navigational status: 0
COG: 321.2d   SOG: 0.1 Knots   ROT: N/A  True Heading: N/A  Time stamp: 01
AIS1 Freq.: 161,975.2 kHz   Fwd.: 11.7 Watt   Rev.: 0.6 Watt   VSWR: 1.59

AIS # 1,   Time/date: 07:26:26 / 26-09-2017
Message ID:  1 MMSI:  219557624
Position:  57d12.3730 N    9d41.0060 E   Pos. accuracy: 0   Navigational status: 0
COG: 341.8d   SOG: 0.1 Knots   ROT: N/A  True Heading: N/A  Time stamp: 31
AIS2 Freq.: 162,025.6 kHz   Fwd.: 11.7 Watt   Rev.: 0.6 Watt   VSWR: 1.59

Receive AIS

In the Receive AIS mode, the test box will receive the MMSI number, AIS data and frequency of the first transponder being detected by the test box.

Use this setup:

Select Receive AIS on the test box and press OK. Select AIS channel and press OK again to request for data. It may take up to 20 seconds until the AIS transponder transmits its data.

Test results are displayed line by line. You may toggle between the lines using  and ↓ to view all the results.

Example of Printout from the Memory:

AIS # 1,   Time/date: 08:26:12 / 14-09-2017
Message ID:  1 MMSI:  219023274
Position:  57d35.6062 N    9d57.5732 E  Navigational status: 15
COG: 293.8d   SOG: 0.0 Knots  ROT: 0d  True Heading: 159  Time stamp: 09
AIS2 Freq.: 162,025.1 kHz

Receive AIS loop

In the Receive AIS loop mode the test box will receive and display the MMSI number and message ID continuously from all AIS transponders within reach – one at a time. The result is kept in the display until the next is received. Results are displayed only, not stored in the memory.

In this mode you also have a choice between AIS1 and AIS2.

Use the same test setup as with Receive AIS.

 

Receive Message 21 (AtoN)

The Receive Message 21 mode enables you to test Aids to Navigation devices. The tests can be performed on AIS1 and AIS2 respectively.

If you wish to include power measurements in the AtoN test, use the same setup as with AIS Receive Sele. Then, the test box will receive the AtoN’s MMSI number and AIS data, and at the same time measure the frequency and the forwarded and reflected power.

If the power test is not required, you may use the same setup as with AIS Receive (over the air).

Select Receive Message 21 on the test box and press OK. Select AIS channel and press OK again to wait for data to be received. Since AtoN information is transmitted with 3-minute intervals on each frequency, it may take up to 6 minutes until the AtoN transmits its data on the AIS frequency requested.

Examples of Printout from the Memory:

AIS # 1,   Time/date: 05:21:01 / 25-09-2017
Message ID: 21 MMSI:  3405
Position:  63d25.6830 N   10d06.4266 E
Name of AtoN: ATON_TEST@@@@@@@@@@
Type of AtoN: 7   Type of position fixing device: 1   Time stamp: 61
AIS1 Freq.: 161,975.0 kHz   Fwd.: 3.2 Watt   Rev.: 0.2 Watt   VSWR: 1.67

AIS # 1,   Time/date: 05:24:01 / 25-09-2017
Message ID: 21 MMSI:  3405
Position:  63d25.6830 N   10d06.4266 E
Name of AtoN: ATON_TEST@@@@@@@@@@
Type of AtoN: 7  Type of position fixing device: 1  Time stamp: 61
AIS2 Freq.: 162,025.0 kHz Fwd.: 10.7 Watt Rev.: 0.6 Watt  VSWR: 1.62

Poll info CH70

Please note: According to ITU Recommendation 1371-5, page 63, section 1.1,

AIS transponders are no longer required to act in response to DSC messages, except for the purpose of AIS channel management. All other DSC messages, including polling requests, are disregarded. Therefore, you may not get any response from the CH70 tests below, and you are advised to write “Not Applicable” (N/A) in this line of your test report.

For AIS transponders with the facility to transmit on CH70 and/or the alternative channels 06 and 15, the test box can be used to poll AIS information.

It is a requirement that the MMSI number registered in the test box is identical with the MMSI of the AIS transponder to be tested. Please check and change number, if required, using the Edit ship’s MMSI menu. See Page 12

Use this setup:

Select Poll info CH70 on the test box and press OK. The AIS transponder can be polled for information on name/identity, position, course, speed, heading, beam, draught and length, etc. Press ↑ and  to toggle between the various polling modes.

Once the polling mode has been selected, press OK. The test box will automatically synchronize with the AIS transponder; transmit the request and then switch to receiving mode.

Wait for the transponder to respond and check the polled information appearing on the test box display. The polled information will also be stored in the test box memory.

The polling mode also offers the opportunity of shifting to the alternative channels 06 and 15.

If you select the alternative channel, remember to switch back to CH 70.

Example of Printout from the Memory:


AIS # 1   Time/date: 10:57:22 / 26-09-2017
VTS DATA: CH70-156.525 MHz RX  MMSI: 9999999990  Format 120 Category: 103
TX MMSI: 2195576240
Position: 57d12.3735 N   009d41.0096 E   Time: 08:57:22
EOS: 122 ECC: 119   Status: OK
Freq.: 156,525.5 kHz   Fwd.: 10.9 Watt   Rev.: 0.6 Watt    VSWR: 1.60

Request Message 5 (Class A)

In this mode you can request a Message 5 from Class A transponders. MSG 5 provides information of the ship’s MMSI, call sign, IMO number, name, type of ship and dimensions, etc.

Use this setup:

Use this setup if you wish to include a power measurement with the test:

It is a requirement that the MMSI number registered in the test box is identical with the MMSI of the AIS transponder to be tested. Please check and change number, if required, using the Edit ship’s MMSI menu.

Select Request MSG 5 and press OK. Then, select AIS frequency and press OK again.

The test box will automatically synchronize with the AIS transponder; transmit the request and then switch to receiving mode. Wait for the transponder to respond and check the MSG 5 information appearing on the test box display.

The received MSG 5 information will also be stored in the test box memory.

Example of Printout from the Memory:

AIS # 1,   Time/date: 08:26:25 / 14-09-2017
Message ID:  5 MMSI:  231774000
C.SIGN: OZ2101   IMO: 007922166   Name: EYSTNES            
Type of ship: 70   Dimension of ship: A: 10 m B: 93 m C: 3 m D: 13 m 
Electronic position fixing device: 1
Draught of ship: 5.0 m   Destination: HIRTSHALS
ETA: MMDD  9-12 HHMM 18:00
AIS1 Freq.: 161,975.0 kHz   Fwd.: 10.1 Watt   Rev.: 0.4 Watt   VSWR: 1.49

Request Message 11 (UTC)

Using the same setup as with Request Message 5, you can request the UTC time. Select Request AIS Message 11 and press OK. Then, select AIS frequency and press OK again. 

The test box will automatically synchronize with the AIS transponder; transmit the request and then switch to receiving mode. Wait for the transponder to respond and check the MSG 11 information appearing on the test box display.

The received MSG 11 information will also be stored in the test box memory.

Example of Printout from the Memory:

AIS # 1,   Time/date: 13:06:06 / 22-01-2018
Message ID: 11  MMSI:  111661003
Position:  57d12.3745 N    9d41.0067 E  Electronic position fixing device: 1
Date: 22-01-2018 Time: 12:05:58
AIS1 Freq.: 161,974.7 kHz Fwd.: 11.6 Watt Rev.: 0.6 Watt  VSWR: 1.59

Request Message 24 (Class B)

Using the same setup as with Request Message 5, you can request a Message 24 from Class B transponders. MSG 24 is divided in two: MSG 24A presenting the ship’s MMSI and name - and MSG 24B providing information of the ship’s MMSI, type of ship, call sign and dimensions.

It is a requirement that the MMSI number registered in the test box is identical with the MMSI of the AIS transponder to be tested. Please check and change number, if required, using the Edit ship’s MMSI menu. See Page 12.

Select Request MSG 24 and press OK. Then, select AIS frequency and press OK again.

The test box will automatically synchronize with the AIS transponder; transmit the request and then switch to receiving mode. Wait for the transponder to respond and check the MSG 24 information appearing on the test box display.

The received MSG 24 information will also be stored in the test box memory.

Example of Printout from the Memory:

AIS # 1,   Time/date: 14:41:30 / 19-04-2017
Message ID: 24 MMSI:  219015583
Name: LIMFJORD PILOT 1@@@@
AIS1 Freq.: 161,975.1 kHz  Fwd.: 1.9 Watt  Rev.: 0.0 Watt  VSWR: 1.00
 
AIS # 1,   Time/date: 14:41:31 / 19-04-2017
Message ID: 24 MMSI:  219015583
Type of ship: 50 C.SIGN: OX2520@
Dimension of ship: A: 7 m  B: 5 m  C: 1 m  D: 3 m
AIS1 Freq.: 161,975.1 kHz  Fwd.: 1.9 Watt  Rev.: 0.0 Watt  VSWR: 1.00

Send AIS message

The test box can transmit a fixed default AIS message or a custom-made message. Following the transmission, you can check that the AIS transponder receives the AIS message correctly.

Use this setup:

The default AIS message already loaded in the test box is a MSG 1 that includes a vessel position of 45°N 45°W.

To transmit the message, just select Send AIS MSG on the test box and press OK. Then, select AIS frequency and press OK again.

Following this, the test box will await a response from the transponder and then automatically send the message.

After the transmission, the test box will display Received status. Press OK if the call was successfully received. Press Fail if the call was not well received. The answer will be stored in the test box memory for your test report.  

Example of Printout from the Memory:

AIS # 1 Time/date: 13:11:25 / 22-11-2011
AIS2 162.025 MHz. Received OK

For the purpose of composing a customized message, a free PC software TEST BOX MANAGER can be downloaded from Danphone’s website. See page 48.

Once composed, the message can be transferred from the PC to the test box via the USB cable supplied with the test box. When connected, follow the instructions on the screen, and the custom-made AIS message will replace the default MSG 1. 

If the custom-made AIS message is removed from the test box later on, the default MSG 1 will automatically load again.

 

Simulate Ship

Using the same setup as with Send AIS Message, the test box can also simulate a ship being located at four different positions around the AIS transponder to be checked. Following the transmissions from the test box, you can check that the AIS transponder receives the four positions correctly.

Since the virtual ship (= the test box) will simulate its positions relative to the position of the AIS transponder being tested, the test box must first receive position data from the AIS transponder. 

The required position data may be registered in the test box already, for instance if you have made other AIS tests prior to Simulate ship. Check this out in the Test results / Show results menu, looking for the latest position data received.

If you prefer not to use these data, perform a new Receive AIS test that includes the receipt of position data. The test box will always use the latest received position data for the Simulate ship test.

With the correct position data in place, select Simulate ship and press OK. Then, select AIS frequency and press OK again.

Press Short or Long to initiate transmissions from the test box. Select Short if you wish to have the virtual ship placed at a short distance (~50 meter) around the transponder. Select Long if you wish to have the ship placed at a longer distance (~800 meter).

Following this, the test box will await a response from the AIS transponder and then automatically send the first position. After transmission of the first position, the test box waits for a new response from the AIS transponder before the second position is transmitted, and so on.

 

Pilot Plug Test

This test is to check that the pilot plug provides information from the AIS transponder onboard.

Use this setup:

Select Pilot plug and press OK.

The test box will receive 10 NMEA messages from the plug.

If the test result shows OK/FAIL: 10/0, it means that the test box received 10 messages and 0 of them were failing.

Example of Printout from the Memory:

AIS # 1   Time/date: 08:03:22 / 21-11-2011
Pilot plug data packet status Ok/Fail: 10/0

Please note that a pilot plug cable is not supplied as a standard with the test box. Can be supplied as an optional extra.

The pilot plug on the test box pilot connects as follows:
pin 1 = Input A
pin 4 = Input B

CONTACT
X