173:
121:(NMEA). Although the NMEA divulges some information regarding the standard, it claims copyright over the standard and thus its full contents are not publicly available. For example, the NMEA publicizes which messages exist and which fields they contain, but they do not disclose how to interpret the values contained in those fields. However, enthusiasts are slowly making progress in discovering these PGN definitions.
209:
196:
There are two sizes of cabling defined by the DeviceNet/NMEA 2000 standard. The larger of the two sizes is denoted as "Mini" (or alternatively, "Thick") cable, and is rated to carry up to 8 Amperes of power supply current. The smaller of the two sizes is denoted as "Micro" (or alternatively, "Thin")
200:
Mini cable is primarily used as a "backbone" (or "trunk") for networks on larger vessels (typically with lengths of 20 m and above), with Micro cable used for connections between the network backbone and the individual components. Networks on smaller vessels often are constructed entirely of Micro
221:
In accordance with the SAE J1939 protocol, NMEA 2000 messages are sent as packets that consist of a header followed by (typically) 8 bytes of data. The header for a message specifies the transmitting device, the device to which the message was sent (which may be all devices), the message priority,
77:
The protocol is used to create a network of electronic devices—chiefly marine instruments—on a boat. Various instruments that meet the NMEA 2000 standard are connected to one central cable, known as a backbone. The backbone powers each instrument and relays data among all of the instruments on the
230:
Devices go through a certification process overseen by the NMEA, and are permitted to display the "NMEA 2000 Certified" logo once they have completed the certification process. The certification process does not guarantee data content, that is the responsibility of the manufacturers. However, the
168:
The NMEA 2000 network, like the SAE J1939 network on which it is based, is organized around a bus topology, and requires a single 120Ω termination resistor at each end of the bus. (The resistors are in parallel, so a properly terminated bus should have a total resistance of 60Ω). The maximum
204:
An NMEA 2000 network is not electrically compatible with an NMEA 0183 network, and so an interface device is required to send messages between devices on the different types of network. An adapter is also required if NMEA 2000 messages are to be received by or transmitted from a PC.
78:
network. This allows one display unit to show many different types of information. It also allows the instruments to work together, since they share data. NMEA 2000 is meant to be "plug and play" to allow devices made by different manufacturers to communicate with each other.
36:, is a plug-and-play communications standard used for connecting marine sensors and display units within ships and boats. Communication runs at 250 kilobits-per-second and allows any sensor to talk to any display unit or other device compatible with NMEA 2000 protocols.
193:. Such cabling systems are permitted to be labeled "NMEA 2000 Approved". The DeviceNet standard defines levels of shielding, conductor size, weather resistance, and flexibility which are not necessarily met by other cabling solutions marketed as "NMEA 2000" compatible.
271:. Some of these, such as SimNet and Seatalk NG, are a standard NMEA 2000 network but use non-standard connectors and cabling; adapters are available to convert to standard NMEA 2000 connectors, or the user can simply remove the connector and make a direct connection.
419:
686:
279:
The term "NMEA 2000" is a registered trademark of the
National Marine Electronics Association. Devices which are not "NMEA 2000 Certified" may not legally use the NMEA 2000 trademark in their advertising.
222:
and the PGN (Parameter Group Number). The PGN indicates which message is being sent, and thus how the data bytes should be interpreted to determine the values of the data fields that the message contains.
152:
protocol used by NMEA 0183. Another improvement is that NMEA 2000 supports a disciplined multiple-talker, multiple-listener data network whereas NMEA 0183 requires a single-talker, multiple-listener (
148:(IEC 61162-1) serial data bus standard. It has a significantly higher data rate (250k bits/second vs. 4800 bits/second for NMEA 0183). It uses a compact binary message format as opposed to the ASCII
613:
169:
distance for any device from the bus is six metres. The maximum backbone cable length is 250 meters (820 feet) with Mini cable backbone or 100 meters (328 feet) with Micro cable backbone
810:
414:
801:
293:
231:
certification process does assure that products from different manufacturers exchange data in a compatible way and that they can coexist on a network.
655:
819:
620:
777:
311:
66:, Simrad Simnet, and Furuno CAN are rebranded implementations of NMEA 2000, though may use physical connectors different from the standardised
137:
high-level protocol, but defines its own messages. NMEA 2000 devices and J1939 devices can be made to co-exist on the same physical network.
303:
298:
252:
789:
316:
508:
197:
cable using the M12 5-pin barrel connector specified in IEC 61076-2-101, and is rated to carry up to 3 Amperes of power supply current.
396:
326:
288:
The following are some of the companies that have registered with the NMEA for the purpose of producing NMEA 2000 certified products:
141:
63:
56:
321:
118:
593:
839:
190:
798:
463:
726:
544:
849:
816:
255:, have their own proprietary networks that are compatible with or akin to NMEA 2000. Simrad's is called
774:
48:("CAN Bus") used on road vehicles and fuel engines. The higher-level protocol format is based on
844:
157:
130:
45:
786:
515:
404:
360:
149:
105:
plotters. The interconnectivity among instruments in the network allows, for example, the
8:
437:
643:
133:(CAN) technology originally developed for the auto industry. NMEA 2000 is based on the
432:
82:
706:
185:
The only cabling standard approved by the NMEA for use with NMEA 2000 networks is the
817:
Luft LA, Anderson L, Cassidy F. "NMEA 2000: A Digital
Interface for the 21st Century"
813:- network wiring for DeviceNet networks, much of which applies to NMEA 2000 networks.
355:
687:"NMEA 2000® Brad® Micro-Change® (M12) and Brad® Mini-Change® Cables and Connectors"
823:
805:
799:
NMEA 2000 Parameter Group
Descriptions (Messages) with (Longer) Field Description
793:
781:
746:
409:
383:
240:
568:
172:
102:
833:
71:
248:
117:
The NMEA 2000 standard was defined by, and is controlled by, the US-based
74:, all of which are electrically compatible and can be directly connected.
452:
90:
94:
483:
447:
378:
244:
186:
145:
134:
67:
60:
53:
49:
32:
216:
614:"NMEA 2000® Certification Process Overview and License Agreement"
391:
153:
488:
373:
336:
331:
109:
receiver to correct the course that the autopilot is steering.
98:
208:
811:
ODVA Planning and
Installation Manual: DeviceNet Cable System
365:
344:
674:
388:
Dometic (formerly SeaStar
Solutions & Teleflex Marine)
591:
106:
86:
787:
NMEA 2000 Parameter Group
Numbers and Brief Description
769:
594:"Beginners guide to Nmea 2000, Nmea 0183, and bridging"
569:"A Breakdown of Protocol: how boats' systems converse"
52:, with specific messages for the marine environment.
234:
592:boatprojects.blogspot.com, ed. (4 December 2012).
644:N2K, cable mixing not a big woop, Panbo, Feb 2008
217:Message format and parameter group numbers (PGNs)
831:
545:"Maretron NMEA 2000®Network Installation Guide"
44:Electrically, NMEA 2000 is compatible with the
144:61162-3) can be considered a successor to the
539:
537:
535:
189:cabling standard, which is controlled by the
567:Bartlett Tim. Power & Motoryacht (ed.).
503:
501:
499:
16:Marine plug-and-play communications standard
180:
532:
212:NMEA-2000 cabling components incl. power-T
727:"Warwick Control Technologies Marine Kit"
573:Power & Motoryacht January 2012 issue
496:
566:
207:
171:
560:
225:
163:
119:National Marine Electronics Association
832:
176:Typical NMEA 2000 Network Installation
455:, a future standard based on Ethernet
775:List of NMEA 2000 Certified Products
93:, wind instruments, depth sounders,
85:devices to include in a network are
13:
656:"NMEA registratered manufacturers"
509:"NMEA 2000® explained white paper"
459:Safety Standards using NMEA 2000
235:NMEA 2000 and proprietary networks
191:Open DeviceNet Vendors Association
14:
861:
763:
707:"Hemisphere GNSS Marine Products"
239:Several manufacturers, including
129:NMEA 2000 connects devices using
283:
124:
739:
719:
699:
679:
464:Automatic Identification System
668:
648:
637:
606:
585:
476:
1:
469:
274:
415:Warwick Control Technologies
7:
770:Official NMEA 2000 Web Page
426:
341:GME Standard Communications
10:
866:
112:
39:
840:Global Positioning System
259:, Raymarine's is called
181:Cabling and interconnect
158:communications protocol
131:Controller Area Network
46:Controller Area Network
267:, and BRP's is called
213:
201:cable and connectors.
177:
211:
175:
150:serial communications
492:. 28 September 2021.
361:Lowrance Electronics
308:Carling Technologies
263:, Stowe's is called
226:Device certification
164:Network construction
30:and standardized as
438:GPS Exchange Format
72:M12 screw connector
850:Marine electronics
822:2010-12-08 at the
804:2016-03-04 at the
792:2009-05-26 at the
780:2019-09-04 at the
443:Related standards
433:Marine electronics
214:
178:
83:marine electronics
675:Actisense website
356:Icom Incorporated
101:instruments, and
22:, abbreviated to
857:
757:
756:
754:
753:
747:"Böning Website"
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737:
736:
734:
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703:
697:
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677:
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641:
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631:
625:
619:. Archived from
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589:
583:
582:
580:
579:
564:
558:
557:
555:
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549:
541:
530:
529:
527:
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520:
514:. Archived from
513:
505:
494:
493:
480:
294:KUS Americas Inc
865:
864:
860:
859:
858:
856:
855:
854:
830:
829:
824:Wayback Machine
806:Wayback Machine
794:Wayback Machine
782:Wayback Machine
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729:
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429:
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410:Hemisphere GNSS
384:Simrad Yachting
286:
277:
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228:
219:
183:
166:
127:
115:
42:
17:
12:
11:
5:
863:
853:
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845:Computer buses
842:
828:
827:
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796:
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772:
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764:External links
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352:Quark-elec(UK)
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126:
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114:
111:
103:nautical chart
70:5-pin A-coded
41:
38:
15:
9:
6:
4:
3:
2:
862:
851:
848:
846:
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837:
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821:
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748:
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728:
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708:
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688:
682:
676:
671:
657:
651:
645:
640:
626:on 2016-04-09
622:
615:
609:
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546:
540:
538:
536:
521:on 2021-05-06
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405:Yamaha Marine
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401:Yacht Devices
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292:
291:
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284:Manufacturers
281:
272:
270:
266:
265:Dataline 2000
262:
258:
254:
250:
246:
242:
232:
223:
210:
206:
202:
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174:
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147:
143:
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136:
132:
125:Functionality
122:
120:
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104:
100:
97:instruments,
96:
92:
88:
84:
79:
75:
73:
69:
65:
62:
58:
55:
51:
47:
37:
35:
34:
29:
25:
21:
750:. Retrieved
741:
730:. Retrieved
721:
710:. Retrieved
701:
690:. Retrieved
681:
670:
659:. Retrieved
650:
639:
628:. Retrieved
621:the original
608:
597:. Retrieved
587:
576:. Retrieved
572:
562:
551:. Retrieved
523:. Retrieved
516:the original
487:
478:
458:
442:
312:Amphenol LTW
287:
278:
268:
264:
260:
256:
238:
229:
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184:
167:
139:
128:
116:
81:Examples of
80:
76:
43:
31:
27:
23:
19:
18:
453:NMEA OneNet
304:SAMYUNG ENC
299:MarineCraft
140:NMEA 2000 (
91:auto pilots
89:receivers,
33:IEC 61162-3
834:Categories
826:2002-01-30
752:2024-01-12
732:2018-04-27
712:2015-01-26
692:2013-11-30
661:2023-04-01
630:2017-06-23
599:2015-09-25
578:2015-09-25
553:2021-05-24
525:2021-05-24
470:References
349:Humminbird
275:Trademarks
261:SeaTalk NG
95:navigation
484:"Canboat"
448:NMEA 0183
379:Raymarine
317:Actisense
245:Raymarine
187:DeviceNet
156:) serial
146:NMEA 0183
135:SAE J1939
68:DeviceNet
61:Raymarine
57:SeaTalk 2
54:Raymarine
50:SAE J1939
20:NMEA 2000
820:Archived
802:Archived
790:Archived
778:Archived
427:See also
397:VeeThree
370:Maretron
327:Empirbus
392:Tohatsu
154:simplex
113:History
64:SeaTalk
40:Details
489:GitHub
420:Böning
374:Navico
337:Garmin
332:Furuno
322:Airmar
257:SimNet
251:, and
241:Simrad
99:engine
24:NMEA2k
624:(PDF)
617:(PDF)
548:(PDF)
519:(PDF)
512:(PDF)
366:Molex
345:Honda
269:CZone
249:Stowe
253:BRP
142:IEC
107:GPS
87:GPS
28:N2K
26:or
836::
571:.
534:^
498:^
486:.
247:,
243:,
160:.
59:,
755:.
735:.
715:.
695:.
664:.
633:.
602:.
581:.
556:.
528:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
