Page 1 INSTRUCTION MANUAL Instruction Manual AI71/AI70 Automatic Identification Systems This manual is intended as a reference guide for installing, operating maintaining Simrad AI71/AI70 Automatic Identification Systems. Man_instr_ai71_ai70_r1...
Page 2 Simrad AI71/AI70 Automatic Identification System Document Revisions Date Written by Checked by Approved by 06.02.04 25.02.04 Document history Rev. 0 Preliminary issue. Rev. 1 Original issue. To assist us in making improvements to this manual, we would welcome comments and constructive criticism.
Page 3 About This Manual This manual is intended as a reference guide for installing, operating and maintaining the Simrad AI71/AI70 Automatic Identification Systems. In this manual, references to buttons on the control unit are written in boldface, and in a different text style (e.g.
Page 4 1. System overview An overview of the AI71/AI70 systems and their components. 2. User interface An overview of the AI71/AI70 user interface, display pages and menus and the Minimum Keyboard and Display (MKD) unit. 3. Technical specifications Specifications for the systems and for all separate units in the AI71/AI70 systems.
Page 5 INSTRUCTION MANUAL Abbreviations and acronyms Addressed and Binary Broadcast Acknowledgement Addressed Binary and Safety Related Message AIS Regional Channel Assignment Universal Ship-borne Automatic Identification System AIS 1 161.975 MHz (87b – 2087) AIS 2 162.025 MHz (88b – 2088) Alarm ARPA Automatic Radar Plotting Aid ASCII...
Page 6 Simrad AI71/AI70 Automatic Identification System Message Not Applicable National Marine Electronics Association NMEA Presentation Interface Pulse-per-second Polyurethane Power Rate of Turn RTCM Radio Technical Commission of Maritime Service Receive Search and Rescue Short Message Service Speed Over Ground SOTDMA Self Organising TDMA...
Page 7: Table Of Contents
2.3 AI71 Overview ............15 Manoeuvring and Selecting ........... 15 Dialogue Boxes ............15 Editing............... 16 Information ..............17 2.4 AI71 Display Pages and Submenus ........17 Ship List view ............. 19 Main Menu ..............20 Alarms and LR ............20 Dynamic Data ............. 22 Settings ..............
Page 8 3.1 Health, Environment and Safety ........38 3.2 Restrictions in Guarantee ..........38 3.3 Power................38 3.4 Data Input ..............38 3.5 Specifications .............38 AI70 MKD Unit (optional AI71) ........38 AI71/AI70 Mobile Unit..........40 GPS4 GPS Antenna ............42 Pilot Plug..............43 INSTALLATION..............45 4.1 General ..............46...
Page 9 Priority of Rate of Turn..........67 SOFTWARE SETUP PROCEDURE ........69 6.1 General ..............70 6.2 Security Settings AI71 ..........71 6.3 Entering Static Data AI71 ..........71 6.4 Network Settings AI71 ..........72 6.5 Configuring External Serial Ports AI71......72 6.6 VHF Data Link AI71 .............73 6.7 Configuring Radio Channels AI71........73...
Page 10 Editing Current Region ..........84 Viewing a Region’s Settings .......... 84 OPERATION..............85 7.1 General ..............86 7.2 Turning the AI71/AI70 Systems ON .......87 7.3 Restarting the AI71/AI70 Systems.........87 7.4 Adjusting Brightness and Contrast .........88 AI71 display settings ........... 88 AI70 display settings ........... 88 7.5 Changing parameters during operation......89...
Page 11 Writing and sending SMS Messages........ 95 The Outbox ..............99 Removing messages ..........100 7.8 The Alarm System............. 101 AI71 alarms ............. 101 Displaying and acknowledging alarms......101 AI70 alarms ............. 101 Displaying and acknowledgeing alarms ......102 7.9 Long-Range Messages (Option) ........102 AI71 long-range ............
Page 12 Simrad AI71/AI70 Automatic Identification System 10 SPARE PART LIST............115 10.1 Simrad AI71 ............. 116 10.2 Simrad AI70 ............. 117 11 COMMISSIONING REPORT ..........119 12 APPENDIX ..............123 12.1 VESSEL IDENTIFIERS ..........124 12.2 MENU TREE .............. 127 12.3 Digital Interface IEC 61162-1........129 Hardware ..............
Page 13: System Overview
SYSTEM OVERVIEW 1 SYSTEM OVERVIEW This section provides an overview of the AI71/AI70 Automatic Identification Systems and their components. Man_instr_ai71_ai70_r1...
Page 14: Introduction
Simrad AI71/AI70 Automatic Identification System 1.1 Introduction The Simrad AI71 and AI70 are Automatic Identification Systems (AIS) that use VHF communication to transmit and receive AIS data. An AIS system operates primarily on two dedicated VHF channels, AIS 1 – 161.975 MHz and AIS 2 –...
Page 15: Coverage
SYSTEM OVERVIEW Coverage The system radio coverage range is similar to other VHF applications and is dependent on the height of the antenna. The propagation differs from that of a radar, due to the longer wavelength, so it is possible to "see" around bends and behind islands if the landmasses are not too high.
Page 16 Simrad AI71/AI70 Automatic Identification System Data reporting and transmission rates AIS data as stated above is autonomously sent at different update rates and thus reporting rates are dependent on the ship's navigational mode. Dynamic information is dependent on speed and course alteration while static and voyage related data are transmitted every 6 minutes or on request.
Page 17: System Components
SYSTEM OVERVIEW 1.2 System Components An AI71 system includes the following units: − AI71 Class A Mobile Unit − Pilot Plug − GPS Antenna (GPS4) − AI71 Minimum Keyboard and Display (MKD) - optional Third party antenna VHF antenna AI71...
Page 18 Simrad AI71/AI70 Automatic Identification System An AI70 system includes the following units: − AI70 Class A Mobile Unit − AI70 Minimum Keyboard and Display (MKD) − Pilot Plug − GPS Antenna (GPS4) Third party antenna VHF antenna AI70 Class A...
Page 19 SYSTEM OVERVIEW The front panel of the AI71 includes a four-line display, five status light indicators and a keypad. This display replaces the external MKD supplied with the AI70. The MKD unit provides a simple user interface to the Mobile Unit with basic presentation of configuration data and position data.
Page 20 Simrad AI71/AI70 Automatic Identification System THIS PAGE INTENTIALLY LEFT BLANK Man_instr_ai71_ai70_r1...
Page 21: User Interface
USER INTERFACE 2 USER INTERFACE This section gives an overview of the AI71 and the AI70 user interfaces. Man_instr_ai71_ai70_r1...
Page 22: Ai71 User Interface
Simrad AI71/AI70 Automatic Identification System 2.1 AI71 User Interface View Info Shift Cancel Edit SIMRAD AI71 Display 4 x 20 character display with LED backlight. LED Indicators The LED indicators on the front of the Mobile Unit can be used to monitor status as well as data reception and transmission.
Page 23: Buttons
USER INTERFACE 2.2 Buttons Buttons divided into three kinds interaction: MANOEUVRING, ENTERING and SELECTING. Manoeuvring: entails moving the "viewport" up, down, left and right in order to display the text. A display page is not limited to 4x20 characters. The manoeuvring allows the user to move a "viewport"...
Page 24 Simrad AI71/AI70 Automatic Identification System Manoeuvring: No functionality Entering: When entering text or numbers, pressing the button enters legal symbols or 1. The different symbols are toggled between by repeatedly pressing this button. Selecting: No functionality. Manoeuvring: Set active line to the line above current line. If on top of screen and there are more lines above, scroll one line up i.e.
Page 25 USER INTERFACE Manoeuvring: Pressing this button moves the viewport right (i.e. scrolls the lines in the display right). If the viewport is on the far right of a given page, nothing happens when the button is pressed. Entering: When entering text or numbers, MNO and/or 6 is entered by pressing the button.
Page 26 Simrad AI71/AI70 Automatic Identification System Manoeuvring: No functionality. Entering: When entering text or numbers, pressing this button cancels the editing. The entered value is discarded. Selecting: When interactive messages or requests are displayed, Cancel pressing this button answers the equivalent to no (if applicable), and exits the interactive message screen, returning to the viewport to the previous position and content.
Page 27: Ai71 Overview
USER INTERFACE 2.3 AI71 Overview Manoeuvring and Selecting The uppermost line on the viewport is the page title. Select wanted line with the buttons. The selected UP/DOWN ARROW line is marked with an underscore character on the right side of the line content.
Page 28: Editing
Simrad AI71/AI70 Automatic Identification System Nav:1 Nav:1 Dest:TRHEIM Dest:TRHEIM ETA:12211000 ETA:12211000 MMSI - SETTINGS ------- - SETTINGS -------- Drgh :25 Drght:25 Name THIS IS TWENTY CHARS Name:THIS IS TWENTY CHARS OnBr :12 OnBrd:12 Call PI255 Call:PI255 Dialogue boxes are shown as whole pages, i.e. they are displayed in the whole "viewport", and forces the user to press...
Page 29: Information
Navigation between Ship List, Main Menu and Diagnostics is done by pressing the button. This chapter VIEW describes all the menu pages in the system. Note! If optional MKD is connected to the AI71, the AI70 menus will also apply to the AI71. Man_instr_ai71_ai70_r1...
Page 30 Simrad AI71/AI70 Automatic Identification System SHIP LIST MAIN MENU Alarms and LR - Active Alarms - LR Requests Dynamic Data Settings - Nav.Status - Voyage Related - Gyro Calibration - Static Data - VHF - LR - Serial - Network...
Page 31: Ship List View
USER INTERFACE Ship List view The default main page of the system is 00.12 023 PRINSESS OF THE SEA called Ship list view and contains RANGE BRG NAME information about nearby vessels. 01.11 025 FOSNINGEN Range, Bearing and Name (MMSI if 02.10 160 NORDLYS name not available) are shown.
Page 32: Main Menu
Simrad AI71/AI70 Automatic Identification System Main Menu Press to enter the Main menu. The user can VIEW choose between Alarms and LR, Dynamic data, Settings, SMS, Downperiods, - MAIN MENU -------- Chn.Management or System. Select menu with Alarms and buttons and enter the...
Page 33 USER INTERFACE Active alarms are listed with the latest alarm on top. This is a read only page. - Active alarms ---- Tx malfunction 11:00 VSWR exceeds 10:49 RX Chn1 malf. 10:3 RX Chn2 malf. 09:01 Heading Lost 08:33 No ROT info 03:42 New LR When an LR request arrives, a dialogue box...
Page 34: Dynamic Data
Simrad AI71/AI70 Automatic Identification System Dynamic Data The Dynamic Data page shows sensor readings. This is a read only page. Press to return CANCEL - Dynamic Data ----- LAT:063°36'31.44N to Main Menu. LON:010°24'13.73E COG:000.00° SOG:000.00kn HDG:N/A ROT:N/A EPFD:GPS Settings From the Main Menu, select Settings, press and the Settings page appears.
Page 35 USER INTERFACE Gyro calibration - Gyro calibration If a stepper gyro is used for heading input, the Corrected heading:9° heading can be calibrated here. This is done by entering the actual heading. Static data - Static data ------- All static ship data can be viewed and altered Name:Boatname here.
Page 36: Sms
Simrad AI71/AI70 Automatic Identification System Serial - Serial ----------- In this page the baud rate for the serial ports can Sensor 1:4800 be set. Sensor 2:4800 Sensor 3:4800 RTCM :4800 :38400 Pilot :38400 :4800 Network - Network ---------- In this page the network settings, e.g. IP-address, IP-addr:15.23.88.775...
Page 37 USER INTERFACE Press to select message. UP/DOWN ARROW displays the message to the user. If the message is - Message --------- This message is an previously read, a check-sign is shown in front of inbox message. that line. [DEL] to delete If the message is more than four lines, [OK] for next msg are used to scroll lines.
Page 38: Down Periods
Simrad AI71/AI70 Automatic Identification System Selecting resends the message with the EDIT same parameters as last time. - Message --------- This message is an outbox message. [DEL] to delete [OK] for next msg [CANCEL] to close [EDIT] to resend Predefined messages...
Page 39: Channel Management
USER INTERFACE Channel Management In the Chn. management menu the user can - Chn.Mngt -------- choose between editing current region, viewing View Regions all regions or adding a new region. Add Region Edit Current region View regions - Regions --------- REGION 1 In this page all regions (max 8) are shown.
Page 40: System
Simrad AI71/AI70 Automatic Identification System Edit Current region - Default Values --- In this page the user can edit current region ChnA:2087 settings. Select parameter with , press UP/DOWN ChnB:2088 to start editing and when finished. Hold EDIT TxPower: HIGH button to save changes to region.
Page 41: Diagnostics
USER INTERFACE For testing purposes only. - Restart GPS ----- Restart In this page the MAC Address is viewed. This is a - MAC Address ------ read only page. MSB: 000.005.190 LSB: 000.005.200 Diagnostics The Diagnostics page shows the submenus - DIAGNOSTICS --- available to display, test and debug the communication links and configuration settings.
Page 42: Pin Code Protection
Simrad AI71/AI70 Automatic Identification System Serial Diagnostics of serial interfaces. Time elapsed since last transmission on each port. Config File Read-out of config. file. For service purposes only. Pin Code Protection The functionality in the mobile unit is protected by a PIN code.
Page 43: Ai70 Mkd Unit (Optional Ai71)
USER INTERFACE 2.5 AI70 MKD Unit (optional AI71) The MKD unit includes the following elements: DISPLAY PAGE BUTTONS VIEW ROTATING KNOB DISPLAY MENU INPUT BACK ENTER SIMRAD AI70 BUTTONS Display The display presents information pages and menus used for data input.
Page 44: Ai70 Display Pages And Submenus
Simrad AI71/AI70 Automatic Identification System 2.6 AI70 Display Pages and Submenus In addition to the default View page (refer page 34, three different display pages with corresponding submenus may be activated on the MKD display: − Menu page (P1). Refer page 34 −...
Page 45: Displaying Submenus
USER INTERFACE Displaying Submenus A highlighted selection in a page or a menu indicates that the selection may be entered, either for displaying data or for entering parameter values. Rotate the knob to move the highlight to the submenu that is to ENTER be entered, and press the button to display the submenu.
Page 46: View Page
Simrad AI71/AI70 Automatic Identification System Use the rotating knob to accept or reject the entries, and press button to accept the selection and return to previous ENTER ENTER page. View Page The View page is the default page on the MKD. This page will be displayed when the system is turned ON and the initialisation sequence is completed.
Page 47 USER INTERFACE Entries in the submenus selected from Main menu may be protected by a security code. Refer Security Settings, page 75. = = = M a i n M e n u = = = = = = = = P 1 1 .
Page 48: Sms Page
7 . W r i t e P r e d . M s g 8 . C l e a r M e s s a g e B o x Refer Using the AI71/AI70 Message System, page 92. An overview of all submenus in the SMS menu is shown on page 127.
Page 49: Technical Specifications
TECHNICAL SPECIFICATIONS 3 TECHNICAL SPECIFICATIONS This section includes specifications for the systems and for all separate units in the AI71/AI70 systems. Man_instr_ai71_ai70_r1...
Page 50: Health, Environment And Safety
Operation or troubleshooting of Simrad AI71/AI70 equipment will not imply any risk for high voltages, explosions or exposure to gas. The AI71/AI70 is compliant with IEC 60950/EN60950 standards regarding product safety (low voltage) and IEC 60945/EN60945 standards on electromagnetic compatibility (immunity/radiation), vibration and climatic conditions.
Page 51 TECHNICAL SPECIFICATIONS Temperature range: Operating: ......–25 to +55°C (–13 to +130°F) Storage: ......–30 to +80°C (–22 to +176°F) FRONT VIEW PANEL MOUNTED BRACKET MOUNTED Man_instr_ai71_ai70_r1...
Page 52: Ai71/Ai70 Mobile Unit
Simrad AI71/AI70 Automatic Identification System AI71/AI70 Mobile Unit Dimensions: ............Refer page 41 Weight: ..............7 kg (15.4 lbs.) Colour: ................. Black Enclosed material: ........Anodised aluminium Environmental protection: ............. IP40 Temperature range: Operating: ......–15 to +55°C (+5° to +131°F) Storage: ......–25 to +60°C (–13°...
Page 53 TECHNICAL SPECIFICATIONS Seatex AIS 100 Transponder Unit top view 264mm TOP VIEW Seatex AIS 100 Transponder Unit front view 230mm 280mm FRONT VIEW Man_instr_ai71_ai70_r1...
Page 54: Gps4 Gps Antenna
Dimensions: ............ Refer figure below Weight: ................0,130 kg Cable adapter set (2 cables): ...........2 x 0.5 m Voltage input: ..... 5 V DC from the AI71/AI70 Mobile Unit Temperature range:............. -35° - +75° Humidity: ..............100% (sealed) Mounting: ........... 1”14 thread (standard US)
Page 55: Pilot Plug
TECHNICAL SPECIFICATIONS Pilot Plug AMP/Receptacle (Square Flanged), Shell size 11, 9-pin Dimensions: ............ Refer figure below Cable (to Mobile Unit): ............7 m Pilot Plug Bracket Man_instr_ai71_ai70_r1...
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Page 57: Installation
INSTALLATION 4 INSTALLATION This section is a reference guide for correctly installing the AI71/AI70 systems. Man_instr_ai71_ai70_r1...
Page 58: General
Note! When the system is commissioned, the Installation report on page 121 has to be filled in and signed by both Kongsberg Seatex personnel and the user. 4.2 Unpacking and Handling Care should be taken when unpacking and handling the equipment.
Page 59 Performed Description page Crew 1. Mount the GPS4 antenna included in the AI71/AI70 system and the third party VHF antenna. 2. Connect the adapter cable to the GPS4 antenna. 3. Pull cables from the antennas to the AI71/AI70 Mobile Unit.
Page 60: Cabling
Interconnection cable GPS4 0.5 m A101-03 Mounting kit, GPS antenna A101-02 The figure below shows cables and cable length in a standard AI71 system. Note! Shaded items and cables are not part of a standard AI71 scope of supply. Man_instr_ai71_ai70_r1...
Page 61 INSTALLATION CABLE DESCRIPTION CABLE PART NO. LENGTH Interface cable with Pilot A100-79 Plug Adapter cable GPS 0.5 m A100-93 Interconnection cable GPS4 0.5 m A101-03 Mounting kit, GPS antenna A101-02 Interface cable to MKD A100-76 The figure below shows cables and cable length in a standard AI70 system.
Page 62 Simrad AI71/AI70 Automatic Identification System Antenna cables The antenna cables should be as short as possible to minimise attenuation of the signal. The cables should be located at least 10 cm away from power supply cables. The table below shows the maximum cable length (VHF) for the different antenna cable types.
Page 63: Location Of The Units
INSTALLATION 4.5 Location of the Units The units included in the AI71/AI70 systems should be mounted with special regard to the units’ environmental protection, temperature range and cable length. Refer TECHNICAL SPECIFICATIONS, page 37 onwards. Antenna location The AIS equipment, like any other ship borne transceiver operating in the VHF maritime band, may cause interference to a ship’s VHF radiotelephone.
Page 64: Ai70 Mkd Unit (Optional Ai71)
Simrad AI71/AI70 Automatic Identification System 4.6 AI70 MKD Unit (optional AI71) Mechanical installation The MKD may be panel or bracket (option) mounted. The optional mounting bracket may be ordered separately. The unit should be mounted with special regard to the operator’s need for easy operation.
Page 65: The Mkd Cable
INSTALLATION Bracket Mounting (Option) When the MKD is bracket mounted (item A100-85), it is not weatherproof from the back due to a breathing hole in the back cabinet. When bracket-mounted, the exposed parts of the plugs should be protected against salt corrosion. 1.
Page 66: Ai71/Ai70 Mobile Unit
Simrad AI71/AI70 Automatic Identification System 4.7 AI71/AI70 Mobile Unit Mechanical installation The Mobile Unit should be mounted in a place with proper ventilation. The unit is secured to deck with four bolts, refer dimensional drawing on page 41. Ensure that there is enough space on the rear side of the unit for installation of plugs and cables.
Page 67: Data Signals
INSTALLATION Data signals The figure below shows the location of the AI71/AI70 data signals on the P1 (upper connector row), P2 (lower connector row). RTCM_RD(B) LR_RD(B) PILOT_RD(B) PI_RD(B) RTCM_RD(A) LR_RD(A) PILOT_RD(A) PI_RD(A) RTCM_TD(B) LR_TD(B) PILOT_TD(B) PI_TD(B) LR_TD(A) RTCM_TD(A) PI_TD(A) PILOT_TD(A)
Page 68: Connector Cover
Simrad AI71/AI70 Automatic Identification System Connector cover IMPORTANT : Cable shield must be terminated under the metal plate. No part of the Cable plastic jacket must be under the plate. Tighten the plate to the shield by means of the screws.
Page 69: Power Connection
4.8 Pilot Plug A Pilot plug with 7 meter cable is included in the AI71/AI70 system. The plug is used for connecting a Personal Pilot Unit (PPU) to the AI71/AI70 system.
Page 70: External Alarm
Simrad AI71/AI70 Automatic Identification System Pairs are numbered 1 and 2 respectively. Individual pair shields are not used. Note! Shield shall be terminated in chassis of rear cover panel. 4.9 External Alarm The Mobile Units do not include an acoustic alarm, but they have a built-in alarm functionality.
Page 71: Gps Antenna
The mounting location for the internal GPS antenna and for the main GPS antenna connected to the AI71/AI70 system, needs to be input to the AI71/AI70 as a part of the configuration settings. The figure shows the offset arms that have to be configured.
Page 72: Sealing Antenna Connectors
After coiling, make a bonding by pressure of fingers. 4.11 VHF Antenna The VHF antenna is not included in a standard AI71/AI70 system, but has to be part of the AIS installation. The antenna should be omni-directional vertical polarization, providing 3 to 5 dB gain.
Page 73: Connecting And Configuring External Equipment61
CONNECTING AND CONFIGURING EXTERNAL EQUIPMENT 5 CONNECTING AND CONFIGURING EXTERNAL EQUIPMENT This section describes how external equipment is connected to the AI71/AI70 systems. Man_instr_ai71_ai70_r1...
Page 74: General
SOLAS Chapter V should be connected to the AI71/AI70 systems. Increased navigational performance can be achieved by interfacing the AI71/AI70 to an ECDIS, ECS and/or radar. All external equipment is connected to the AI71/AI70. For termination, refer Data signals, page 55.
Page 75: Presentation Interface
The PI port provides a primary port for connecting onboard equipment such as ECDIS, radar, Long Range AIS etc. The Pilot port is used for the Pilot Plug included in the AI71/AI70 systems. This plug is intended for the ship's pilot equipment, service equipment, etc. Physical location Installed on P2, pins 13 - 17.
Page 76: Proprietary Input Sentences
Simrad AI71/AI70 Automatic Identification System Proprietary input sentences Sentence Content MMSI MMSI number IMO number PORT Serial port configuration parameters Output sentences Sentence Content Transmission interval Upon reception of Acknowledgement message messages 7 and 13, and when sending message 15...
Page 77: Port Configuration
CONNECTING AND CONFIGURING EXTERNAL EQUIPMENT Port configuration The Long Range port has the following default settings: Baud Rate Parity Bits Stop Bit 4800 The baud rate is configurable from 1200 to 57600. Refer Configuring External Serial Ports, pages 72 and 80. Input sentences Sentence Content...
Page 78: Input Sentences
Simrad AI71/AI70 Automatic Identification System The baud rate is configurable from 1200 to 57600. Refer Configuring External Serial Ports, pages 72 and 80. Input sentences Sentence Contents Position, TOD, position quality (diff/non-diff) Position, TOD, position quality (diff/non-diff) Position, TOD, position quality (diff/non-diff)
Page 79: Priority Of Sog And Cog
CONNECTING AND CONFIGURING EXTERNAL EQUIPMENT Priority of SOG and COG Priority Sentence Priority of Heading Priority Sentence Priority of Rate of Turn Priority Sentence OSD (derived from heading) HDT (derived from heading) Man_instr_ai71_ai70_r1...
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Page 81: Software Setup Procedure
SOFTWARE SETUP PROCEDURE 6 SOFTWARE SETUP PROCEDURE This section is a reference guide for correctly configuring the AI71/AI70 systems. Man_instr_ai71_ai70_r1...
Page 82: General
Simrad AI71/AI70 Automatic Identification System 6.1 General The AI71/AI70 systems are set up with factory settings during testing. The software setup must be performed as a part of the AI71/AI70 installation procedure. The software setup is performed from sub-menus available from...
Page 83: Security Settings Ai71
PIN: **** on the Settings menu. Note! A master PIN code can be handed out from Kongsberg Seatex Custom Support. 6.3 Entering Static Data AI71 Static data - Static data ------- Static data are specific ship data that do not Name:Boatname change from one voyage to another.
Page 84: Network Settings Ai71
An example of such a configuration: AIS unit's IP address: 10.0.21.10. PC's IP address: 10.0.21.11. 6.5 Configuring External Serial Ports AI71 The serial port baud rate must be set up according to external instrumentation. The sensor interfaces comply with the NMEA 0183.
Page 85: Vhf Data Link Ai71
SOFTWARE SETUP PROCEDURE 6.6 VHF Data Link AI71 The VHF page includes ON/OFF status for transmitter and VDL answer mode. ON/OFF status: The transmitter setting is recommended set to TX: ON. Note! The transmitter may be turned OFF at Master's discretion should an emergency situation occur.
Page 86: Edit Current Region
Simrad AI71/AI70 Automatic Identification System ChA: The radio channel to be used as channel A. ChB: The radio channel to be used as channel B. RxTx: Transmission/reception mode. This parametre indicates whether or not the AIS should transmit and receive on both channels, or on only a subset of these.
Page 87: Security Settings Ai70
Menu page. Setting the security codes The AI71 system is delivered with “1234” as the default security code. The AI70 system is delivered with “AIS” as default security code for both Level 1 and Level 2. These security codes should be changed when the system is configured for the first time.
Page 88: Changing The Security Levels
Simrad AI71/AI70 Automatic Identification System = = = S e c u r i t y = = = = = = = = P 1 c 3. Enter AIS (default security code), and A u t h o r i s a t i o n...
Page 89: Entering Static Data Ai70
SOFTWARE SETUP PROCEDURE = = = = = = = = = = = = = = = = = = = = = = = = = 0 1 2 4. Select security level, and confirm by highlighting the symbol and pressing the button.
Page 90 Simrad AI71/AI70 Automatic Identification System Use the arrow-down button to move to next page where mounting specifications for the GPS antenna included in the AI70 system should be entered. Refer page 59. = = = S t a t i c D a t a = = = = = P 1 4...
Page 91: Network Settings Ai70
SOFTWARE SETUP PROCEDURE 6.10 Network Settings AI70 The Netw.Settings menu is used by the network administrator when the AI70 system is connected to a LAN. = = = M a i n M e n u = = = = = = = = P 1 1.
Page 92: Configuring External Serial Ports Ai70
Simrad AI71/AI70 Automatic Identification System 6.11 Configuring External Serial Ports AI70 The Baud rate for each serial port used for interfacing external equipment has to be configured from the Serial ports submenu. = = = M a i n M e n u = = = = = = = = P 1 1.
Page 93: Answer Mode Ai70
SOFTWARE SETUP PROCEDURE 6.12 Answer Mode AI70 The Answer mode page configures the polling operation for the AI70 system. = = = M a i n M e n u = = = = = = = = P 1 1.
Page 94: Configuring Radio Channels Ai70
Simrad AI71/AI70 Automatic Identification System 6.13 Configuring Radio Channels AI70 AIS systems operate normally on two AIS channels: channel 2087 and channel 2088. Where these channels not are available regionally, other channels may be configured by using the Chn.Management submenu. Maximum 8 regions may be configured.
Page 95: Adding A Region
SOFTWARE SETUP PROCEDURE Adding a Region = = = A d d R e g i o n = = = = = P 1 6 3 The Add regions option is used for defining R E G I O N - 1 new regions.
Page 96: Editing Current Region
Simrad AI71/AI70 Automatic Identification System Editing Current Region = = = E d i t C u r . R e g = = P 1 6 1 The Edit Cur.Reg. option enables the R E G I O N - 1...
Page 97: Operation
OPERATION 7 OPERATION This section holds the main operating procedures for using the AI71/AI70 system. Man_instr_ai71_ai70_r1...
Page 98: General
Simrad AI71/AI70 Automatic Identification System 7.1 General The AI71/AI70, once activated, will continuously and autonomously broadcast the vessel’s position and all the static and dynamic information as required by IMO. However, while the vessel’s speed and rate of turn manoeuvres...
Page 99: Turning The Ai71/Ai70 Systems On
LED will be flashing at one second intervals and the AI70 MKD will show the View page, refer page 31, and the AI71 internal display will show the Ship List View page, see page 19. No ON/OFF switch is included on the units. The system is turned OFF when power is disconnected.
Page 100: Adjusting Brightness And Contrast
Simrad AI71/AI70 Automatic Identification System 7.4 Adjusting Brightness and Contrast AI71 display settings Press buttons simultaneously to adjust SHIFT INFO SHIFT INFO brightness and contrast. Select Display contrast and the Display setting view appears. Select wanted setting (Contrast or Backlight) by pressing .
Page 101: Changing Parameters During Operation
It is important to set the navigational status with regard to the current vessel status as this affects the reporting rate and information transmitted to other vessels. For AI71 press the button to activate the Main Menu, VIEW select Settings and Nav.Status. Press...
Page 102: Entering Voyage Data
Simrad AI71/AI70 Automatic Identification System Entering Voyage Data For AI71 press to enter Main Menu, select Settings and VIEW Voyage related. The Voyage related page will be displayed showing previously set voyage navigational data. Enter information described below for AI70. Hold to save.
Page 103: Turning The Vhf Transmitter Off
7.6 Turning the VHF Transmitter OFF In situations where transmission would endanger the ship, e.g. in war situations, piracy etc, the VHF transmitter may be turned OFF. For AI71 press button to activate Main Menu, select VIEW Settings and VHF. Select TX, press and choose ON/OFF.
Page 104: Using The Ai71/Ai70 Message System
Simrad AI71/AI70 Automatic Identification System 7.7 Using the AI71/AI70 Message System The AI71/AI70 systems include an SMS function, making it possible to send text message to other vessels or to shore based stations. Using SMS in AI71 All SMS functions are selected from the SMS page, activated by selecting SMS in the Main Menu.
Page 105: The Outbox
Many AIS manufacturers do not implement the full set of AIS SMS messages. The AI71/AI70 have a complete set of AIS SMS messages including Addressed, Safety related addressed and Safety related broadcast messages accessible from the display.
Page 106: Using Sms In Ai70
Simrad AI71/AI70 Automatic Identification System Using SMS in AI70 All SMS functions are selected from the SMS page, activated by pressing the button. = = = S M S M e n u = = = = = = = = = P 2 1 .
Page 107: Writing And Sending Sms Messages
OPERATION The following notations are used in the Inbox page: • Unread messages: Vessel name with capital letters • Security messages: • Broadcast messages: = = = I n b o x = = = = = = = = = = = P 2 1 1 S A N D P I P E R - - - - - - - - - - - - - - - - - - - - - - - - - - The message is displayed by highlighting...
Page 108 Simrad AI71/AI70 Automatic Identification System Writing General Text Messages and Safety Related Messages General and safety related text messages could be sent to any vessel within reach, e.g. vessels presented in the View page. A safety related message will be transmitted with higher priority than a general text message, and will be transmitted before any other pending general message.
Page 109 OPERATION Writing Broadcast Messages Broadcast messages must be safety related, and they will be sent without any specific destination. Text entry is similar to entering general or safety related messages. Any sent broadcast message will be displayed in the Outbox view labelled with a # prefix.
Page 110 Simrad AI71/AI70 Automatic Identification System Sending a predefined message When the Predefined Message view is active, one of the predefined messages may be selected, eventually edited, and then sent. = = = P r e d e f i n e d = = = = = = P 2 3...
Page 111: The Outbox
OPERATION The Outbox All sent messages will be automatically moved to the Outbox view. As for the Inbox, the following notations are used in the Outbox view: • Messages not transmitted: Vessel name with capital letters • Security messages: • Broadcast messages: = = = O u t b o x = = = = = = = = = = = = P 2 S e n d t M e s s a g e s - - - - - - - - - - - - - - - - - - - - - - - - - -...
Page 112: Removing Messages
Simrad AI71/AI70 Automatic Identification System Removing messages The AI70 system may save up to 30 different messages. This includes messages both in the Inbox and the Outbox, as well as predefined messages. To make sure that no messages are deleted unintentionally by the system, the operator should regularly remove messages from the AI70 system manually.
Page 113: The Alarm System
OPERATION 7.8 The Alarm System The AI71/AI70 system does not include an internal acoustic alarm. It is, however, possible to connect an external alarm to the system as described in External Alarm, page 58. AI71 alarms If an alarm situation occurs, the Alarm menu will *** Alarm ********** appear and display the latest alarm.
Page 114: Displaying And Acknowledgeing Alarms
A c k n o w l e d g e A L L 7.9 Long-Range Messages (Option) The AI71/AI70 contains a long-range interface for connection to an external communication system like Inmarsat. If long-range equipment is included in the system, it is possible to poll AIS system data from anywhere within the Inmarsat coverage area.
Page 115: Deleting A Long-Range Request
OPERATION To view a list of all the long-range inquiries that have - Alarms & LR ------ been received, access the Main Menu and enter the Active Alarms Alarms & LR option. LR requests Under LR requests there is a complete list of all LR - LR Answers ------- requests (inquiries).
Page 116: Resolving A Long-Range Request
Simrad AI71/AI70 Automatic Identification System Resolving a long-range request The AI70 system may be set up to answer a long range request automatically or manually. Refer Answer Mode, page 81. If the system is set up to manually answer a long range request,...
Page 117: Maintenance
MAINTENANCE 8 MAINTENANCE This section describes simple maintenance procedures that should be performed by the system operator. Man_instr_ai71_ai70_r1...
Page 118: General
Simrad AI71/AI70 Automatic Identification System 8.1 General All units in the AI71/AI70 systems are “repair by replacement” units, and the operator is therefore required to perform only a limited amount of preventive maintenance on the units. The service in the field is limited to: •...
Page 119: Repair And Modifications
Caution! If the antenna cable is attached to the Mobile Unit, do not attach the antenna cable to the antenna when the AI71/AI70 is powered. If the antenna cable is short-circuited with power on, the GPS receiver within the unit can be damaged.
Page 120: Exchanging Gps Or Vhf Antennas
Caution! If the antenna cable is attached to the Mobile unit, do not attach the antenna cable to the antenna when the AI71/AI70 is powered. If the antenna cable is short-circuited with power on, the GPS receiver within the unit can be damaged.
Page 121: Troubleshooting
TROUBLESHOOTING 9 TROUBLESHOOTING This section holds trouble shooting procedures that could be performed for checking hardware and external interface. Man_instr_ai71_ai70_r1...
Page 122: General
Simrad AI71/AI70 Automatic Identification System 9.1 General The LED indicators on the front of the Mobile Unit can be used to monitor status as well as data reception and transmission. Colour Description Transmitter idle Amber Transmitting on AIS channel B (blinking)
Page 123: Power Supply Failing
GPS receiver failing If the LED on the front of the Mobile Unit does not have green light, no GPS PPS pulse is received. The AI71/AI70 system computes no position data, and the GPS receiver inside the Mobile Unit should be checked.
Page 124: Vhf Transceiver Failing
External data connections may be incorrect: • Data input from main GPS source • Heading from vessel heading sensor Data input from main GPS/GNSS source Position data input to the AI71/AI70 system is received from the vessel’s main GPS/GNSS receiver...
Page 125: Heading From Vessel Heading Sensor
If the Mobile Unit still does not receive heading data, consult Kongsberg Seatex for advice. AIS unit restarts If the AIS unit frequently restarts, please note that the AIS is dependent upon 24 V DC/50 W.
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Page 127: Spare Part List
SPARE PART LIST 10 SPARE PART LIST This sections includes part numbers for all standard and optional units that may be included in the AI71/AI70 systems. Man_instr_ai71_ai70_r1...
Page 128: Simrad Ai71
Simrad AI71/AI70 Automatic Identification System 10.1 Simrad AI71 Standard Supplied Equipment A120-12 Simrad AI71 including Part No Description A101-05 Simrad AI71 Class A Mobile Station A101-01 GPS antenna, GPS4 A101-02 Mounting kit for GPS4 A101-03 Interconnection cable for GPS4 A100-93 Adapter cable set for GPS antenna cable, one cables, length 0.5 m...
Page 129: Simrad Ai70
A100-93 Adapter cable set for GPS antenna cable, one cables, length 0.5 m A100-79 Interface cable with pilot plug, length 7m A100-97 Manual set for Simrad AI71/Simrad AI70 Standard Supplied Equipment Part No Description A101-06 Simrad AI70 Class A Mobile Station...
Page 130 Simrad AI71/AI70 Automatic Identification System A100-60 GPS/VHF antenna cable (low loss), price per m, maximum length 100 m* A100-71 Connector kit for GPS antenna cable (low loss), two connectors A100-73 Connector kit for VHF antenna cable (low loss), two connectors B200-12 Adapter cable set for VHF antenna cable, two cables length 0.5 m...
Page 131: Commissioning Report
COMMISSIONING REPORT 11 COMMISSIONING REPORT A commissioning report is found on next page. This report should be completed and signed when the system is commissioned. Man_instr_ai71_ai70_r1...
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Page 133 MSG LED indicator green & amber blink GPS LED indicator green blink GPS position update Functionality VHF functionality test GPS functionality test General AI70 MKD AI71 AI70 Mobile Unit Serial numbers Sw version Static Data Name IMO number Call signal...
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Page 135: Appendix
APPENDIX 12 APPENDIX This section includes Vessel identifiers, Menu trees and IEC 61162-1 sentence description. Man_instr_ai71_ai70_r1...
Page 136: Vessel Identifiers
Simrad AI71/AI70 Automatic Identification System 12.1 VESSEL IDENTIFIERS The table on the following pages holds an overview of all vessel identifiers that should be used in an AIS system. The following abbreviations are used in the table: WIG: Wing In Ground...
Page 137 APPENDIX First digit Second digit Reserved for future use Reserved for future use Vessel Fishing Vessel Towing Towing and length of the tow exceeds 200 m Vessel or breadth exceeds 25 m Engaged in dredging or underwater Vessel operations Vessel Engaged in diving operations Vessel Engaged in military operations...
Page 138 Simrad AI71/AI70 Automatic Identification System First digit Second digit Spare – for assignments to local vessels Medical transports (as defined in the 1949 Genova Conventions and Additional Protocols) Shops according to RR Resolution No. 18 (Mob-83) Passenger ships Reserved for future use...
Page 139: Menu Tree
APPENDIX First digit Second digit Other types of ship Reserved for future use Other types of ship Carrying DG, HS or MP, IMO hazard or pollutant category A Other types of ship Carrying DG, HS, or MP, IMO hazard or pollutant category B Other types of ship Carrying DG, HS, or MP, IMO hazard or pollutant category C Other types of ship...
Page 140 Simrad AI71/AI70 Automatic Identification System MENU Select menu item Main Menu Confirm 1. Nav. Status ENTER selection (Action page: Predefined navigational status) 2. Long Range Save and revert (Display page: Long-Range requests) BACK to previous page 3. Voyage Data (Action page: DESTINATION, ETA, DRGHT, ONBRD) 4.
Page 141: Digital Interface Iec 61162-1
APPENDIX 12.3 Digital Interface IEC 61162-1 Hardware The recommended wiring (the figures below are excerpts from IEC 61162-2, ed. 1) is as shown on the drawings. The A, B and C designation correspond with the data signals as shown on figure on page 55.
Page 142: Proprietary 61162-1 Sentences
Simrad AI71/AI70 Automatic Identification System Proprietary 61162-1 sentences General In order to configure and service the AI70 Mobile Unit there are some proprietary messages that can be used. The AIS Mobile Unit uses the NMEA registered "STX" manufacturer’s code. When setting parameters in the AIS Mobile Unit use the $PSTXS command.
Page 143 APPENDIX MSI number To request the current MMSI number from the AIS Mobile Unit, use the command: $PSTXQ,MMSI*<FCS><CR><LF> The AIS Mobile Unit response message has the format: $PSTXR,MMSI,<nnnn>*<FCS><CR><LF> To set or change the MMSI number, use the command: $PSTXS,MMSI,<nnnn>*<FCS><CR><LF> Field Description Range MMSI...
Page 144 Simrad AI71/AI70 Automatic Identification System Serial port communication parameters To request the current communication parameters of the serial ports, and to retrieve all available serial ports, use the command: $PSTXQ,PORT*<FCS><CR><LF> The AIS Mobile Unit response message has the format (one message per port): $PSTXR,PORT,CCCC,<bbbb>,<p>,<d>,<s>*<FCS><CR><...
Page 145: New Iec 61162-1 Sentences
APPENDIX New IEC 61162-1 sentences This subchapter contains a description of proposed IEC 61162-1 sentences due to AIS. Reference is made to IEC 61193-2, 2001, annex B2 and IEC/PAS 61162-100. ABK – Addressed and binary broadcast acknowledgement The ABK-sentence is generated when a transaction, initiated by reception of an ABM, AIR, or BBM sentence, is completed or terminated.
Page 146 Simrad AI71/AI70 Automatic Identification System NOTE 3 This indicates to the external application the type of ITU-R M.1371 message that this ABK sentence is addressing. Also see the message IDs listed in NOTE 4. NOTE 4 The message sequence number, together with the ITU-R M.1371 message ID and MMSI of the addressed AIS unit,...
Page 147 APPENDIX ABM – Addressed Binary and safety related message This sentence supports ITU-R M.1371 messages 6 and 12. It provides an external application with a means to exchange data using an AIS. The message data is defined by the application only –...
Page 148 Simrad AI71/AI70 Automatic Identification System fields. Successive sentences may use null fields for fields that have not changed, such as fields 4, 5, and 6. NOTE 2 This sequential message identifier serves two purposes. It is both an IEC 61162-1 "sequential message identifier field," and it is the "sequence number"...
Page 149 APPENDIX This sentence is used to both enter and obtain channel management information. When sent to an AIS unit, the ACA- sentence provides regional information that the unit stores and uses to manage the internal VHF radio. When sent from an AIS unit, ACA-sentence provides...
Page 150 Simrad AI71/AI70 Automatic Identification System NOTE 3 VHF channel number, see ITU-R M.1084, Annex 4 NOTE 4 Value of 0, bandwidth is specified by channel number, see ITU- R M.1084, Annex 4 Value of 1, bandwidth is 12,5 kHz. NOTE 5...
Page 151 APPENDIX be found within the message 15 description in ITU-R M.1371. Improper requests may be ignored. The external application initiates the interrogation. The external application is responsible for assessing the success or failure of the interrogation. After receiving this sentence, the AIS initiates a radio broadcast (on the VHF Data Link) of a message 15 –...
Page 152 Simrad AI71/AI70 Automatic Identification System Message 17, GNSS Broadcast Binary Message, (all available corrections are requested), Message 20, Data Link Management Message, Message 22, Channel Management. NOTE 3 This field is used to request a message that has been further sub- divided into alternative data structures.
Page 153 APPENDIX NOTE 1 The total number of IEC 61162-1 sentences needed to transfer the contents of the binary message to the AIS. The first field specifies the total number of sentences used for a message, minimum value 1. The second field identifies the order of this sentence in the message, minimum value 1.
Page 154 Simrad AI71/AI70 Automatic Identification System NOTE 5 To encapsulate, the number of binary bits must be a multiple of six. If it is not, one to five "fill bits" are added. This parameter indicates the number of bits that were added to the last 6-bit coded character.
Page 155 APPENDIX LRI – Long-Range Interrogation The long-range interrogation of the AIS is accomplished through the use of two sentences. The pair of interrogation sentences, a LRI-sentence followed by a LRF-sentence, provides the information needed by an AIS to determine if it must construct and provide the reply sentences (LRF, LR1, LR2, and LR3).
Page 156 Simrad AI71/AI70 Automatic Identification System interrogation is for a geographic region. When addressing a specific AIS, it is not necessary to provide the geographic co- ordinates of the region. NOTE 4 The geographic region being interrogated is a "rectangular" area defined by the latitude and longitude of the north-east and south- west corners.
Page 157 APPENDIX characters from A to Z, but not all of the defined information is available from the AIS. The following is a list of the function identification characters with the information they request: A = Ship's: name, call sign, and IMO number B = Date and time of message composition C = Position E = Course over ground...
Page 158 Simrad AI71/AI70 Automatic Identification System NOTE 1 The three fields, sequence number, MMSI of responder, and MMSI of requestor are always provided. NOTE 2 The sequence number should be the same number as the sequence number of the LRI and LRF sentences that initiated this reply.
Page 159 APPENDIX The information item was requested, but it is not being provided. LR3 – Long-range Reply for function requests "I, O, P, U and W" The LR3-sentence contains the information requested by the "I, O, P, U, and W" function identification characters (see the LRF- sentence).
Page 160 Simrad AI71/AI70 Automatic Identification System NOTE 6 See ITU-R M.1371:2000, table 17, parameter "Type of ship and cargo type" for the range of valid values available for this field. SSD – Ship Static Data This sentence is used to enter static parameters into a shipboard AIS.
Page 161 APPENDIX NOTE 4 The DTE indicator is an abbreviation for Data Terminal Equipment indicator. The purpose of the DTE indicator is to inform distant receiving applications that, if set to "available" the transmitting station conforms, at least, to the minimum keyboard and display requirements.
Page 162 Simrad AI71/AI70 Automatic Identification System multiple sentences, each sentence of the message contains the same sequential message identification number. It is used to identify the sentences containing portions of the same message. This allows for the possibility that other sentences might be interleaved with the message sentences that, taken collectively, contain a single message.
Page 163 APPENDIX NOTE 2 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 message requiring multiple sentences, each sentence of the message contains the same sequential message identification number.
Page 164 Simrad AI71/AI70 Automatic Identification System NOTE 1 Type of ship and cargo category are defined in ITU-R M.1371. The description of ship and cargo are indicated by a number. The values are defined in ITU-R M.1371, message 5. A null field indicates that this is unchanged.
Page 165 APPENDIX 4 = constrained by draught 5 = moored 6 = aground 7 = engaged in fishing 8 = under way sailing 9 = reserved for High Speed Craft 10 = reserved for Wing In Ground 11 to 14 = reserved for future use 15 = not defined (default) NOTE 8 Definition of values 1 to 15 provided by a competent regional...
Page 166: Iec 61162-1, Ed. 2, Sentences
Simrad AI71/AI70 Automatic Identification System IEC 61162-1, Ed. 2, sentences ACK – Acknowledge alarm Acknowledge device alarm. This sentence is used to acknowledge an alarm condition reported by a device. ALR – Set alarm state Local alarm condition and status. This sentence is used to report an alarm condition on a device and its current state of acknowledgement.
Page 167 APPENDIX NOTE 1 Three character alpha code for local datum. If not one of the listed earth-centred datums, or 999 for user defined datums, use IHO datum code from International Hydrographic Organisation Publication S-60, Appendices B and C. Null field if unknown. NOTE 2 One character subdivision datum code when available or user defined reference character for user defined datums, null field...
Page 168 Simrad AI71/AI70 Automatic Identification System GBS – GNSS satellite fault detection This message is used for setting the RAIM flag in the position reports sent by the AIS. NOTE 1 Expected error in metres due to bias, with noise = 0.
Page 169 APPENDIX GGA – Global positioning system (GPS) fix data Time, position and fix-related data for a GPS receiver. NOTE 1 GPS quality indicator: 0 = fix not available or invalid 1 = GPS SPS mode, fix valid 2 = differential GPS, SPS mode, fix valid 3 = GPS PPS mode, fix valid 4 = Real Time Kinematic.
Page 170 Simrad AI71/AI70 Automatic Identification System GLL – Geographic position – latitude/longitude Latitude and longitude of vessel position, time of position fix and status. NOTE 1 Positioning system Mode indicator: A = Autonomous D = Differential E = Estimated (dead reckoning)
Page 171 APPENDIX $GNGNS, and use the mode indicator to show which satellite systems are being used. NOTE 1 Mode Indicator. A variable length valid character field type with the first two characters currently defined. The first character indicates the use of GPS satellites, the second character indicates the use of GLONASS satellites.
Page 172 Simrad AI71/AI70 Automatic Identification System The Mode indicator shall not be a null field. NOTE 2 Age of differential data and Differential reference station ID When the talker is GN and more than one of the satellite systems are used in differential mode, then the "Age of differential data"...
Page 173 APPENDIX SC104 Type 34 corrections are used solely, or in combination with Type 31 corrections, the age is the average of the most recent corrections for the satellites used. Null field when differential GLONASS is not used. NOTE 3 HDOP calculated using all the satellites (GPS, GLONASS and any future satellites) used in computing the solution reported in each GNS sentence.
Page 174 Simrad AI71/AI70 Automatic Identification System NOTE Reference systems on which the calculation of vessel course and speed is based. The values of course and speed are derived directly from the referenced system and do not additionally include the effects of data in the set and drift fields.
Page 175 APPENDIX NOTE 3 The positioning system Mode indicator field supplements the positioning system Status field (field No. 2) which shall be set to V = invalid for all values of Mode indicator except for A = Autonomous and D = Differential. The positioning system Mode indicator and Status fields shall not be null fields.
Page 176 Simrad AI71/AI70 Automatic Identification System VBW – Dual ground/water speed Water-referenced and ground-referenced speed data. NOTE 1 Transverse speed: "-" = port, Longitudinal speed: "-" = astern. NOTE 2 The status field shall not be a null field. All fields are used by the AIS except Stern speed.
Page 177 APPENDIX Course over ground, degrees magnetic and Speed over ground km/h are not used by the 'AIS ZDA – Time and date UTC, day, month, year and local time zone. NOTE 1 Local time zone is the magnitude of hours plus the magnitude of minutes added, with the sign of local zone hours, to local time to obtain UTC.

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Kongsberg AI71 Instruction Manual

1 System Overview

2 User Interface

3 Technical Specifications

4 Installation

5 Connecting and Configuring External Equipment61

6 Software Setup Procedure

7 Operation

8 Maintenance

9 Troubleshooting

10 Spare Part List

11 Commissioning Report

12 Appendix

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