Configuration using proAtoN Channel 2 start UTC This is the hour and minute for transmission on channel 2. This specifies the AIS frame (minute) within a day in which the start slot for channel 2 resides. Typically the channel 2 start time is offset by 3 minutes from the start time used for channel 1. With a 6 minute reporting interval on each channel this results in a transmission every 3 minutes on alternating channels. Channel 2 start slot This is the slot number for the first transmission on channel 2.
Configuration using proAtoN The transceiver is now configured to report message #21 on channel 1 every 6th minute, and on channel 2 every 6th minute, but offset by three minutes from channel 1. This results in a transmission of message #21 every three minutes on alternating channels. The actual start slot selected for each channel will depend on the FATDMA allocations in the area of operation. 7.3.
Configuration using proAtoN The transceiver is now configured to report message #21 on channel 1 every 6th minute, and on channel 2 every 6th minute, but offset by three minutes from channel 1. This results in a transmission of message #21 every three minutes on alternating channels. The exact timings of the transmissions within the selected minute will vary as the transceiver selects available slots using RATDMA. 7.3.
Configuration using proAtoN ● A synthetic AtoN MMSI has the same format as a real AtoN MMSI, e.g., 99MID1XXX, where MID is the appropriate national MID and XXX is a number unique to this station. The position of the virtual or synthetic AtoN must be configured appropriately to the position of the aid. The dimensions of the virtual or synthetic AtoN should also be configured.
Configuration using proAtoN ● No action - no message is transmitted on detection of a BIIT failure ● Transmit message #14. A broadcast text message is transmitted on detection of a BIIT failure. The text content of the message must be defined in the ‘Message text’ box. ● Transmit message #12. An addressed text message is transmitted on detection of a BIIT failure. The destination for the addressed message is configured on the ‘Real AtoN’ tab (see section 7.3.
Configuration using proAtoN Current status display (when connected to transceiver) Set fixed status as installed Set status bit source Set status input logic Figure 23 Status input configuration tab layout Current status (message 21) This section shows the current lamp and RACON status determined by the transceiver. The transceiver must be connected and powered from a DC supply in order for this display to operate correctly.
Configuration using proAtoN The internal GNSS receiver supports SBAS (Satellite Based Augmentation Service) to enable improved accuracy and integrity of GNSS position fixes. The availability of SBAS depends on the installation location of the transceiver (the WAAS SBAS service covers most of the US and the EGNOS service covers Europe). 7.4.2 Diagnostics tab The Diagnostics tab provides system version and status information.
Configuration using proAtoN Message text Description / Resolution Standby blocked: Off position algorithm The transceiver can’t enter standby (low power) mode because the ‘off position’ algorithm has detected an off position condition. Moving the transceiver within the configured operating radius will resolve this. Standby Blocked: Acquiring GPS The transceiver can’t enter standby (low power) mode because it is currently acquiring a GNSS position fix.
Configuration using proAtoN Alarm text Description / Resolution Supply voltage The transceiver power supply voltage is outside of the permitted range. The measured supply voltage is displayed on the proAtoN diagnostics tab. Low forward power The transmitter forward power is below a preset limit please contact your supplier. Synchronisation lost Timing information is not available from the internal GNSS receiver - please contact your supplier. 7.4.
Operation 8 Operation T1 T1+S T3 T3+S Once configured and connected to a power supply and antennas the transceiver will operate autonomously. Correct operation can be confirmed by checking for reception of Aids to Navigation reports (message 21) using another AIS device. 8.1 Standby operation During operation the transceiver will enter a low power standby mode between scheduled transmissions. The unit will not enter standby mode under the following conditions.
Data messages and data sources 9 Data messages and data sources The transceiver can be configured to transmit a range of data messages in addition to the standard AIS AtoN position report. The purpose, content and means of configuring supported message types is described in the table below.
Data messages and data sources 9.2 Variants with the extended sensor interface T1+S T3+S The extended sensor interface provides a wide range of input and output capabilities as listed in section 6.2. The transceiver is supplied ready with direct support for a specific set of external sensing equipment and AtoN status inputs. The extended sensor interface can also be adapted through software changes to support almost any equipment that might be encountered in an AtoN application.
Data messages and data sources Impress S12C pressure and temperature sensor connection Water pressure (depth / tide level) and temperature are collected by an Impress Sensors & Systems S12C sensor connected to the transceiver extended sensor interface. The S12C sensor communicates using an SDI-12 bus data interface (see section 6.2.8 for further information). The installation must provide a suitable power supply for the SDI-12 bus as this is not provided by the transceiver.
Data messages and data sources Message #8 FI 31 data field Data source Notes Wind gust direction Airmar PB200 weather station WIMWD wind direction output The direction of the wind at the peak wind speed during the previous 10 minute period Air temperature Airmar PB200 weather station WIMDA air temperature output The air temperature provided by the sensor is averaged over 10 minutes before output Relative humidity NA Data not provided Dew point NA Data not provided Air pressure Airmar PB200
Data messages and data sources 9.2.2 Message #8 FI 31 data field Data source Notes Precipitation (type) NA Data not provided Salinity NA Data not provided Ice NA Data not provided Configuration for message #6, DAC 235, FI 10 for UK GLA AtoN monitoring message In order to transmit this message the transceiver must be appropriately configured and interfaced to appropriate signals as described below.
Manual configuration 10 Manual configuration T1 T1+S T3 T3+S The transceiver is configured using standardised NMEA0183 (IEC61162-1/2) sentences developed for configuration of AIS Aids to Navigation transceivers. 10.1 Basic Type 1 AIS AtoN configuration (FATDMA operation) The following information is the minimum required configuration for a Type 1 AIS AtoN reporting message #21 only. ● The AtoN station must be configured with the 'real' AtoN MMSI using the AID command.
Manual configuration Note 1 The MMSI is defined in the AID sentence. This field contains the linkage between the MMSI definition (AID), Message 21 configuration (ACF, and ACE) and scheduling (AAR) of Message 21 transmissions. Note 2 Message ID is the message identification of the message being scheduled. When Message ID is 0 this indicates that the slots being defined will be used for chaining messages.
Manual configuration Note 8 This field is used to indicate a sentence that is a status report of current settings or a configuration command changing settings. This field should not be null. “R’ = sentence is a query response, “C” = sentence is a configuration command to change settings. 10.2.
Manual configuration Note 2 This field is used to indicate a sentence that is a status report of current settings or a configuration command changing settings. This field should not be null. “R’ = sentence is a query response “C” = sentence is a configuration command to change settings. 10.2.5 AFC - AtoN function ID capability This sentence is used to provide the capability information of implemented function ID by the EUT. This sentence is initiated with a QAFC and the response is the AFC.
Manual configuration 10.2.7 AKE - Configure encryption key This sentence assigns the encryption key that will be used by the AES algorithm to communicate configuration and status information via the VDL. This sentence allows for the entire 128 bit encryption key to be entered, the user must know the current encryption key. The initial encryption key, when shipped from the manufacturer, will be all 0's.
Manual configuration 10.2.10MPR - Message configuration of payload re-broadcast This message will be used to command the AIS AtoN Station to rebroadcast the payload or to define a new message for autonomous, continuous transmission. The AAR configuration with message ID/message ID index for a specific MPR must precede the MPR to identify it as autonomous continuous transmission.
Manual configuration Note 7 Total number of consecutive slots to be blocked from use by the Base Station. The first slot of the block is also part of the count. Therefore, the minimum value is 1. 1-5 = number of prohibited slots. Note 8 This field is used to control the prohibited slots. This field should not be null.
Manual configuration Note 7 The third data field provides the sequential message identifier. The sequential message identifier provides a message identification number from 0 to 9 that is sequentially assigned and is incremented for each new multi-sentence message. The count resets to 0 after 9 is used. For a VER reply requiring multiple sentences, each sentence of the message contains the same sequential message identification number.
Manual configuration Note 4 This field is used to indicate a sentence that is a status report of current settings or a configuration command changing settings. This field should not be null. “R’ = sentence is a query response, “C” = sentence is a configuration command to change settings. 10.3.4 Lamp / RACON configuration query This command issued to query the transceiver for the current Lamp / RACON configuration. The response will be in the format described in 10.3.3.
Technical specification 11 Technical specification 11.1 Applicable equipment standards IEC62320-2 Maritime navigation and radiocommunication equipment and systems – Edition 1.0, 2008 Automatic identification system (AIS) – Part 2: AIS AtoN Stations – Operational and performance requirements, methods of testing and required test results ITU-R M.
Technical specification 11.2.3 Electrical Nominal supply voltage 12 to 24VDC Absolute min and 10 to 32VDC max supply voltages Power consumption at 12VDC supply Type 1 (FATDMA) with message #21 transmission every 3 minutes, 0.1Ah/day Type 3 (RATDMA) with message #21 transmission every 3 minutes, 1.0AH/day 11.2.4 Internal GPS Receiver channels 50 Time to first fix (cold start) <36 seconds Frequency L1 band, 1575.42MHz Accuracy 2.5m CEP / 5.0m SEP without differential correction 2.0m CEP / 3.
Technical specification Message #21 Position and status report for aids-to-navigation Message #25 Short unscheduled binary data transmission (Broadcast or addressed) Message #26 Scheduled binary data transmission (Broadcast or addressed) 11.2.8 Connector types Power and basic transceiver interfaces Souriau UTS714D19PW32 with type W keying. USB configuration Souriau UTS78D4P32 Mating half UTS6JC14E19SW. Mating half is UTS6JC8E4S.
Technical specification 11.2.9 Transceiver data interfaces USB USB interface for configuration and diagnostics NMEA0183 / IEC61162 / RS422 1x bi-directional RS422 level interface carrying IEC61162 sentences for configuration, diagnostics and sensor data interface (receiver optically isolated) 1x input only RS422 level interface configuration and sensor data interface (optically isolated) Non-isolated digital I/O 6x 3.3V logic level I/O signals, Inputs 0 – 3 mapped to AtoN status bits in message #21.
Technical specification 11.
Technical specification Figure 25 Transceiver general assembly Page 64
Technical specification Figure 26 Transceiver dimensions Page 65
Firmware upgrade procedure 12 Firmware upgrade procedure T1 T1+S T3 T3+S The transceiver firmware can be updated should a new version be made available. The firmware update is transferred to the transceiver using the USB interface. The pre-requisites for carrying out a firmware update are: ● AIS AtoN Transceiver, connected to a 12 or 24V power supply. The power supply must not be interrupted during the software update.
Firmware upgrade procedure Page 67
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