{"id":240039,"date":"2024-10-19T15:42:31","date_gmt":"2024-10-19T15:42:31","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-61993-22018-tc\/"},"modified":"2024-10-25T10:25:38","modified_gmt":"2024-10-25T10:25:38","slug":"bs-en-iec-61993-22018-tc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-61993-22018-tc\/","title":{"rendered":"BS EN IEC 61993-2:2018 – TC"},"content":{"rendered":"
IEC 61993-2:2018 is also available as \/2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61993-2:2018 specifies the minimum operational and performance requirements, methods of testing and required test results conforming to performance standards adopted by IMO in Resolution MSC.74(69):1998, Annex 3. This document incorporates the applicable technical characteristics of Class A shipborne equipment included in Recommendation ITU-R M.1371 and takes into account the ITU Radio Regulations, where applicable. In addition, it takes account of IMO Resolution A.694(17) to which IEC 60945 is associated. When a requirement in this document is different from IEC 60945, the requirement of this document takes precedence. This document also specifies the minimum requirements both for the means to input and display data and for the interfaces to other equipment suitable to be used as means of input and display data. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following technical changes with respect to the previous edition: a) it incorporates the technical characteristics included in Recommendation ITU R M.1371-5:2014; b) it introduces the concept of locating device groups in order to include EPIRB AIS and MOB AIS in addition to AIS SART; c) it adds security features for configuration input by introducing a new sentence SSA; d) it adds optional implementation of IEC 61162-450\/460 interfaces; e) it adds requirements for bridge alert management (BAM); f) it introduces extended dimension values used by towing vessels; g) it adds a software update requirement.<\/p>\n
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185<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
188<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
190<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
198<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
200<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
201<\/td>\n | 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
202<\/td>\n | 3.2 Abbreviated terms <\/td>\n<\/tr>\n | ||||||
203<\/td>\n | 4 General requirements 4.1 General 4.1.1 Overview 4.1.2 General requirements 4.1.3 Capabilities of the AIS 4.1.4 Additional requirements <\/td>\n<\/tr>\n | ||||||
204<\/td>\n | 4.1.5 Transmitter shutdown procedure 4.1.6 Quality assurance 4.2 Modes of operation 4.3 Manuals 4.4 Marking and identification <\/td>\n<\/tr>\n | ||||||
205<\/td>\n | 5 Other requirements 5.1 Environmental, power supply, special purpose and safety requirements 5.2 Display of information 5.3 Update of software 6 Performance requirements 6.1 Composition <\/td>\n<\/tr>\n | ||||||
206<\/td>\n | 6.2 Time and position 6.2.1 Source for UTC 6.2.2 Source for AIS position reporting <\/td>\n<\/tr>\n | ||||||
207<\/td>\n | 6.3 User interface 6.4 Identification 6.5 Information 6.5.1 Information provided by the AIS Tables Table 1 \u2013Talker IDs for automatic detection of electronic position fixing system type <\/td>\n<\/tr>\n | ||||||
208<\/td>\n | 6.5.2 Information reporting intervals <\/td>\n<\/tr>\n | ||||||
209<\/td>\n | 6.5.3 Ship reporting capacity 6.6 Event log Table 2 \u2013 Information reporting intervals for autonomous mode <\/td>\n<\/tr>\n | ||||||
210<\/td>\n | 6.7 Permissible initialization period 6.8 Power supply 6.9 Technical characteristics 6.10 Alerts and indications, fall-back arrangements 6.10.1 Built-in test equipment <\/td>\n<\/tr>\n | ||||||
211<\/td>\n | Table 3 \u2013 Required conditions for BIIT and reaction of the system to the condition detected <\/td>\n<\/tr>\n | ||||||
212<\/td>\n | Table 4 \u2013 Classification of required alerts <\/td>\n<\/tr>\n | ||||||
213<\/td>\n | 6.10.2 Status messages Table 5 \u2013 Mapping between BAM alert states and ALR alert states <\/td>\n<\/tr>\n | ||||||
214<\/td>\n | Table 6 \u2013 Sensor status indications signalled using TXT sentence formatter <\/td>\n<\/tr>\n | ||||||
215<\/td>\n | Table 7 \u2013 Position sensor fall-back conditions <\/td>\n<\/tr>\n | ||||||
216<\/td>\n | Table 8 \u2013 Use of accuracy (PA) flag <\/td>\n<\/tr>\n | ||||||
217<\/td>\n | 6.11 Display, input and output 6.11.1 Minimum keyboard and display (MKD) Table 9 \u2013 ROT sensor fallback conditions <\/td>\n<\/tr>\n | ||||||
218<\/td>\n | Table 10 \u2013 Identification of locating devices when active Table 11 \u2013 Identification of locating devices when in test mode <\/td>\n<\/tr>\n | ||||||
219<\/td>\n | Table 12 \u2013 Identification of locating devices for type approval testing <\/td>\n<\/tr>\n | ||||||
220<\/td>\n | Table 13 \u2013 Message display on MKD <\/td>\n<\/tr>\n | ||||||
221<\/td>\n | 6.11.2 Communication test 6.11.3 Alerts and status information Table 14 \u2013 Position quality <\/td>\n<\/tr>\n | ||||||
222<\/td>\n | 6.11.4 Data protection 6.11.5 Distance calculation <\/td>\n<\/tr>\n | ||||||
223<\/td>\n | 6.12 Protection from invalid controls 7 Technical requirements 7.1 General 7.2 Physical layer Figure 1 \u2013 OSI layer model <\/td>\n<\/tr>\n | ||||||
224<\/td>\n | 7.2.1 General 7.2.2 Transmitter parameters Figures Figure 2 \u2013 Power versus time characteristics Table 15 \u2013 Transmitter parameters <\/td>\n<\/tr>\n | ||||||
225<\/td>\n | 7.2.3 Receiver parameters 7.3 Link layer 7.3.1 General Table 16 \u2013 Power versus time characteristics Table 17 \u2013 Receiver parameters <\/td>\n<\/tr>\n | ||||||
226<\/td>\n | 7.3.2 Link sublayer 1: Medium Access Control (MAC) 7.3.3 Link sublayer 2: Data Link Service (DLS) 7.3.4 Link sublayer 3 \u2013 Link Management Entity (LME) <\/td>\n<\/tr>\n | ||||||
227<\/td>\n | Table 18 \u2013 Use of VDL messages <\/td>\n<\/tr>\n | ||||||
229<\/td>\n | 7.4 Network layer 7.4.1 General 7.4.2 Management of regional operating settings <\/td>\n<\/tr>\n | ||||||
230<\/td>\n | 7.5 Transport layer 7.6 Presentation interface 7.6.1 General <\/td>\n<\/tr>\n | ||||||
231<\/td>\n | 7.6.2 Automatic input of sensor data Table 19 \u2013 Presentation interface access <\/td>\n<\/tr>\n | ||||||
232<\/td>\n | 7.6.3 High-speed input\/output ports Table 20 \u2013 IEC 61162-1 sensor sentences <\/td>\n<\/tr>\n | ||||||
234<\/td>\n | Table 21 \u2013 AIS high-speed input data and formats <\/td>\n<\/tr>\n | ||||||
235<\/td>\n | Table 22 \u2013 AIS high-speed output data and formats <\/td>\n<\/tr>\n | ||||||
236<\/td>\n | Table 23 \u2013 Property identifiers <\/td>\n<\/tr>\n | ||||||
238<\/td>\n | 7.6.4 Long-range communication ports <\/td>\n<\/tr>\n | ||||||
239<\/td>\n | Table 24 \u2013 AIS Long-range communications input data and formats <\/td>\n<\/tr>\n | ||||||
240<\/td>\n | 7.6.5 Optional IEC 61162-450\/-460 interface Table 25 \u2013 LR output data formats <\/td>\n<\/tr>\n | ||||||
241<\/td>\n | Table 26 \u2013 Default input transmission groups with applicable sentences Table 27 \u2013 TAG block parameters <\/td>\n<\/tr>\n | ||||||
242<\/td>\n | Table 28 \u2013 CRP sentences applicable for Class A AIS <\/td>\n<\/tr>\n | ||||||
243<\/td>\n | 7.6.6 Test of the optional IEC 61162-450\/-460 interface <\/td>\n<\/tr>\n | ||||||
244<\/td>\n | 7.6.7 BIIT alert output Table 29 \u2013 Tests to be repeated for IEC 61162-450 interface <\/td>\n<\/tr>\n | ||||||
245<\/td>\n | 8 Long-range applications 8.1 General 8.2 Long-range application by two-way interface 8.2.1 General 8.2.2 Interrogations and responses 8.2.3 Manual and automatic response 8.2.4 Data formats and contents <\/td>\n<\/tr>\n | ||||||
246<\/td>\n | 8.2.5 Addressing AIS-units 8.3 Long-range application by broadcast Table 30 \u2013 LR data types <\/td>\n<\/tr>\n | ||||||
247<\/td>\n | 9 Test conditions 9.1 Normal and extreme test conditions 9.1.1 Normal test conditions 9.1.2 Extreme test conditions 9.2 Standard test environment <\/td>\n<\/tr>\n | ||||||
248<\/td>\n | 9.3 Additional test arrangements 9.3.1 Arrangements for test signals applied to the receiver input 9.3.2 Encoder for receiver measurements 9.3.3 Waiver for receivers 9.3.4 Impedance 9.3.5 Artificial antenna (dummy load) 9.3.6 Facilities for access 9.3.7 Modes of operation of the transmitter <\/td>\n<\/tr>\n | ||||||
249<\/td>\n | 9.4 Common test conditions for protection from invalid controls 9.5 Measurement uncertainties 10 Test signals 10.1 Standard test signal number 1 (DSC) 10.2 Standard test signal number 2 (TDMA) 10.3 Standard test signal number 3 (TDMA) <\/td>\n<\/tr>\n | ||||||
250<\/td>\n | 10.4 Standard test signal number 4 (PRBS) 10.5 Standard test signal number 5 (PRBS) Figure 3 \u2013 Format for repeating four-packet cluster Table 31 \u2013 Content of first two packets Table 32 \u2013 Fixed PRS data derived from Recommendation ITU-T O.153 <\/td>\n<\/tr>\n | ||||||
251<\/td>\n | 11 Power supply, special purpose and safety tests 12 Environmental tests 13 EMC tests 14 Operational tests 14.1 Identification and operating modes 14.1.1 Autonomous mode <\/td>\n<\/tr>\n | ||||||
252<\/td>\n | 14.1.2 Assigned mode 14.1.3 Polled mode <\/td>\n<\/tr>\n | ||||||
253<\/td>\n | 14.1.4 Addressed operation <\/td>\n<\/tr>\n | ||||||
254<\/td>\n | 14.1.5 Broadcast operation <\/td>\n<\/tr>\n | ||||||
255<\/td>\n | 14.1.6 Multiple slot messages 14.2 Manuals, marking and identification 14.2.1 Method of measurement <\/td>\n<\/tr>\n | ||||||
256<\/td>\n | 14.2.2 Required results 14.3 Information 14.3.1 Information provided by the AIS 14.3.2 Reporting intervals <\/td>\n<\/tr>\n | ||||||
258<\/td>\n | 14.4 Event log 14.4.1 Method of measurement 14.4.2 Required results 14.5 Software update 14.5.1 Method of measurement <\/td>\n<\/tr>\n | ||||||
259<\/td>\n | 14.5.2 Required results 14.6 Initialization period 14.6.1 Method of measurement 14.6.2 Required results 14.7 Technical characteristics 14.7.1 Channel selection 14.7.2 Transceiver protection <\/td>\n<\/tr>\n | ||||||
260<\/td>\n | 14.7.3 Automatic power setting 14.8 Alerts and indicators, fall-back arrangements 14.8.1 Loss of power supply 14.8.2 Monitoring of functions and integrity <\/td>\n<\/tr>\n | ||||||
263<\/td>\n | 14.8.3 Monitoring of sensor data <\/td>\n<\/tr>\n | ||||||
266<\/td>\n | 14.9 Display, input and output <\/td>\n<\/tr>\n | ||||||
267<\/td>\n | 14.9.1 Data input\/output facilities 14.9.2 Initiate message transmission <\/td>\n<\/tr>\n | ||||||
268<\/td>\n | 14.9.3 Communication test 14.9.4 System control <\/td>\n<\/tr>\n | ||||||
269<\/td>\n | 14.9.5 Display of received targets <\/td>\n<\/tr>\n | ||||||
270<\/td>\n | 14.9.6 Display of position quality 14.9.7 Display of targets if optional filter is implemented <\/td>\n<\/tr>\n | ||||||
271<\/td>\n | 14.9.8 Display of received safety related messages 14.9.9 Presentation of navigation information 15 Physical tests <\/td>\n<\/tr>\n | ||||||
272<\/td>\n | 15.1 TDMA transmitter 15.1.1 Frequency error 15.1.2 Carrier power Figure 4 \u2013 Measurement arrangement for frequency error Figure 5 \u2013 Measurement arrangement for carrier power <\/td>\n<\/tr>\n | ||||||
273<\/td>\n | 15.1.3 Slotted transmission spectrum Figure 6 \u2013 Emission mask for slotted transmission <\/td>\n<\/tr>\n | ||||||
274<\/td>\n | 15.1.4 Modulation accuracy 15.1.5 Transmitter output power characteristics Figure 7 \u2013 Measurement arrangement for modulation accuracy Table 33 \u2013 Peak frequency deviation versus time <\/td>\n<\/tr>\n | ||||||
275<\/td>\n | 15.2 TDMA receivers 15.2.1 Sensitivity Figure 8 \u2013 Measurement arrangement <\/td>\n<\/tr>\n | ||||||
276<\/td>\n | 15.2.2 Error behaviour at high input levels 15.2.3 Co-channel rejection <\/td>\n<\/tr>\n | ||||||
277<\/td>\n | 15.2.4 Adjacent channel selectivity 15.2.5 Spurious response rejection Figure 9 \u2013 Measurement arrangement with two generators <\/td>\n<\/tr>\n | ||||||
278<\/td>\n | Figure 10 \u2013 SINAD or PER\/BER measuring equipment <\/td>\n<\/tr>\n | ||||||
280<\/td>\n | 15.2.6 Intermodulation response rejection and blocking Figure 11 \u2013 Test set-up Table 34 \u2013 Tests to be performed <\/td>\n<\/tr>\n | ||||||
281<\/td>\n | 15.2.7 Transmit to receive switching time 15.2.8 Immunity to out-of-band energy Figure 12 \u2013 Transmit to receive switching time measurement setup <\/td>\n<\/tr>\n | ||||||
282<\/td>\n | 15.3 Conducted spurious emissions 15.3.1 Spurious emissions from the transmitter <\/td>\n<\/tr>\n | ||||||
283<\/td>\n | 15.3.2 Spurious emissions from the receiver 16 Specific tests of link layer 16.1 TDMA synchronisation 16.1.1 Synchronisation test using UTC <\/td>\n<\/tr>\n | ||||||
284<\/td>\n | 16.1.2 Synchronisation test using UTC with repeated messages 16.1.3 Synchronisation test without UTC, semaphore <\/td>\n<\/tr>\n | ||||||
285<\/td>\n | 16.1.4 Synchronisation test without UTC 16.1.5 Reception of un-synchronised messages 16.2 Time division (frame format) 16.2.1 Method of measurement 16.2.2 Required results 16.3 Synchronisation and jitter accuracy 16.3.1 Definition 16.3.2 Method of measurement <\/td>\n<\/tr>\n | ||||||
286<\/td>\n | 16.3.3 Required results 16.4 Data encoding (bit stuffing) 16.4.1 Method of measurement 16.4.2 Required results 16.5 Frame check sequence 16.5.1 Method of measurement 16.5.2 Required results 16.6 Slot allocation (channel access protocols) 16.6.1 Network entry <\/td>\n<\/tr>\n | ||||||
287<\/td>\n | 16.6.2 Autonomous scheduled transmissions (SOTDMA) 16.6.3 Autonomous scheduled transmissions (ITDMA) 16.6.4 Safety related\/binary message transmission <\/td>\n<\/tr>\n | ||||||
288<\/td>\n | 16.6.5 Transmission of Message 5 (ITDMA) 16.6.6 Assigned operation <\/td>\n<\/tr>\n | ||||||
289<\/td>\n | 16.6.7 Group assignment <\/td>\n<\/tr>\n | ||||||
292<\/td>\n | 16.6.8 Fixed allocated transmissions (FATDMA) <\/td>\n<\/tr>\n | ||||||
293<\/td>\n | 16.6.9 Randomisation of message transmissions 16.7 Message formats 16.7.1 Received messages 16.7.2 Transmitted messages <\/td>\n<\/tr>\n | ||||||
294<\/td>\n | 17 Specific tests of network layer 17.1 Dual channel operation \u2013 Alternate transmissions 17.1.1 Method of measurement 17.1.2 Required results 17.2 Regional area designation by VDL message 17.2.1 Method of measurement Figure 13 \u2013 Regional area scenario <\/td>\n<\/tr>\n | ||||||
295<\/td>\n | 17.2.2 Required results 17.3 Regional area designation by serial message 17.4 Regional area designation with lost position 17.4.1 Method of measurement 17.4.2 Required results 17.5 Power setting 17.5.1 Method of measurement Table 35 \u2013 Primary channels for each region <\/td>\n<\/tr>\n | ||||||
296<\/td>\n | 17.5.2 Required results 17.6 Message priority handling 17.6.1 Method of measurement 17.6.2 Required results 17.7 Slot reuse and FATDMA reservations 17.7.1 Method of measurement 17.7.2 Required results <\/td>\n<\/tr>\n | ||||||
297<\/td>\n | 17.8 Management of received regional operating settings 17.8.1 Test for replacement or erasure of dated or remote regional operating settings <\/td>\n<\/tr>\n | ||||||
298<\/td>\n | 17.8.2 Test of correct input via presentation interface or MKD 17.8.3 Test of addressed telecommand <\/td>\n<\/tr>\n | ||||||
299<\/td>\n | 17.8.4 Test for invalid regional operating areas 17.9 Continuation of autonomous mode reporting interval 17.9.1 Method of test 17.9.2 Required results 18 Specific tests of transport layer <\/td>\n<\/tr>\n | ||||||
300<\/td>\n | 18.1 Addressed messages 18.1.1 Transmission 18.1.2 Acknowledgement 18.1.3 Transmission retry 18.1.4 Acknowledgement of addressed safety related messages 18.1.5 Behaviour of NavStatus 14 reception <\/td>\n<\/tr>\n | ||||||
301<\/td>\n | 18.2 Interrogation responses 18.2.1 Method of measurement 18.2.2 Required results 19 Specific presentation interface tests 19.1 General 19.2 Checking manufacturer’s documentation <\/td>\n<\/tr>\n | ||||||
302<\/td>\n | 19.3 Electrical test 19.3.1 Method of measurement 19.3.2 Required results 19.4 Test of input sensor interface performance 19.4.1 Method of measurement 19.4.2 Required results 19.5 Test of sensor input 19.5.1 Test of GNS input <\/td>\n<\/tr>\n | ||||||
303<\/td>\n | 19.5.2 Test of RMC input 19.5.3 Test of DTM input <\/td>\n<\/tr>\n | ||||||
304<\/td>\n | 19.5.4 Test of GBS input <\/td>\n<\/tr>\n | ||||||
305<\/td>\n | 19.5.5 Test of VBW input 19.5.6 Test of VTG input 19.5.7 Test of HDT\/THS input <\/td>\n<\/tr>\n | ||||||
306<\/td>\n | 19.5.8 Test of ROT input 19.5.9 Test of different inputs <\/td>\n<\/tr>\n | ||||||
307<\/td>\n | 19.5.10 Test of multiple inputs 19.6 Test of high-speed output 19.6.1 Method of measurement 19.6.2 Required results 19.7 High-speed output interface performance 19.7.1 Method of measurement <\/td>\n<\/tr>\n | ||||||
308<\/td>\n | 19.7.2 Required results 19.8 Output of undefined VDL messages 19.8.1 Method of measurement 19.8.2 Required results 19.9 Test of high-speed input 19.9.1 General 19.9.2 Test of VSD input sentence 19.9.3 Test of SSD input sentence <\/td>\n<\/tr>\n | ||||||
309<\/td>\n | 19.9.4 Test of EPV input sentence <\/td>\n<\/tr>\n | ||||||
310<\/td>\n | 19.9.5 Test of the pilot port access level 20 Long-range functionality tests 20.1 Long-range application by two-way interface 20.1.1 LR interrogation 20.1.2 LR “all ships” interrogation <\/td>\n<\/tr>\n | ||||||
311<\/td>\n | 20.1.3 Consecutive LR “all ships” interrogations 20.2 Long-range application by broadcast 20.2.1 Long-range broadcast <\/td>\n<\/tr>\n | ||||||
312<\/td>\n | 20.2.2 Multiple assignment operation <\/td>\n<\/tr>\n | ||||||
314<\/td>\n | Annex A (informative) Block diagram of AIS <\/td>\n<\/tr>\n | ||||||
315<\/td>\n | Annexes Annex B (normative) AIS interface overview <\/td>\n<\/tr>\n | ||||||
316<\/td>\n | Annex C (normative) DSC functionality C.1 DSC compatibility C.2 DSC receiver tests C.2.1 Maximum sensitivity C.2.2 Error behaviour at high input levels <\/td>\n<\/tr>\n | ||||||
317<\/td>\n | C.2.3 Co-channel rejection C.2.4 Adjacent channel selectivity C.2.5 Spurious response rejection <\/td>\n<\/tr>\n | ||||||
318<\/td>\n | C.2.6 Intermodulation response rejection <\/td>\n<\/tr>\n | ||||||
319<\/td>\n | C.2.7 Blocking or desensitisation Figure C.1 \u2013 Measurement arrangement for inter-modulation <\/td>\n<\/tr>\n | ||||||
320<\/td>\n | C.2.8 Conducted spurious emissions from the receiver C.3 DSC functionality tests C.3.1 Definition C.3.2 Method of measurement <\/td>\n<\/tr>\n | ||||||
321<\/td>\n | C.3.3 Required results <\/td>\n<\/tr>\n | ||||||
322<\/td>\n | Annex D (informative) Alert handling with ALR\/ACK Table D.1 \u2013 IEC 61993-2:2012 alert states Table D.2 \u2013 IEC 61993-2:2012 alert events <\/td>\n<\/tr>\n | ||||||
323<\/td>\n | Figure D.1 \u2013 State diagram of IEC 61993-2 Ed.2 Alert handling <\/td>\n<\/tr>\n | ||||||
324<\/td>\n | Annex E (normative) Calculation of area size and distance E.1 Importance of a common method for area size and distance calculations E.2 Calculation of area sizes Table E.1 \u2013 Coordinate points <\/td>\n<\/tr>\n | ||||||
325<\/td>\n | E.3 Calculation of general distances E.3.1 General E.3.2 Great-circle E.3.3 Rhumb-line distance <\/td>\n<\/tr>\n | ||||||
326<\/td>\n | Annex F (normative) New interface sentences \u2013 Sender signature authentication (SSA) <\/td>\n<\/tr>\n | ||||||
328<\/td>\n | Annex G (normative) Updated interface sentences G.1 General G.2 VSD \u2013 AIS voyage static data <\/td>\n<\/tr>\n | ||||||
330<\/td>\n | Annex H (informative) Conversion between IEC 61162-1 sentences and IEC 61162-3 parameter group numbers Table H.1 \u2013 Conversion between IEC 61162-1 and IEC 61162-3 <\/td>\n<\/tr>\n | ||||||
332<\/td>\n | Annex I (normative) Extended tow dimension values I.1 Purpose and background I.2 Method <\/td>\n<\/tr>\n | ||||||
333<\/td>\n | Figure I.1 \u2013 Input, extension and transmitted dimensional values <\/td>\n<\/tr>\n | ||||||
334<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Maritime navigation and radiocommunication equipment and systems. Automatic Identification Systems (AIS) – Class A shipborne equipment of the automatic identification system (AIS). Operational and performance requirements, methods of test and required test results<\/b><\/p>\n |