nmea 2000® importance to boat builders nmea 2000® importance to boat builders

Annapolis Sailboat Show October 7, 2005 Maretron

Leading the Way in NMEA 2000® Technology

NMEA 2000® Importance to Boat BuildersBy

Larry Anderson – Maretron VP of Sales & Marketing

(Chairman NMEA Standards 1999-2004)

Leading the Way in NMEA 2000Leading the Way in NMEA 2000®® TechnologyTechnology

NMEA 2000NMEA 2000®® Importance to Boat BuildersImportance to Boat BuildersByBy

Larry Anderson Larry Anderson –– Maretron VP of Sales & MarketingMaretron VP of Sales & Marketing

(Chairman NMEA Standards 1999(Chairman NMEA Standards 1999--2004)2004)

MaretronMaretron


Industry Expert CommentIndustry Expert Comment

•• ““NMEA 2000 really works, and it’s going to make boating NMEA 2000 really works, and it’s going to make boating better.better. Simplicity, redundancy, multi manufacturer Simplicity, redundancy, multi manufacturer flexibilityflexibility——my first handsmy first hands--on experience with NMEA 2000 on experience with NMEA 2000 was, as we say up here in Maine, a corker! This relatively was, as we say up here in Maine, a corker! This relatively simple setup was pleasantly similar to working with simple setup was pleasantly similar to working with TinkertoysTinkertoys. The wires are made up in various lengths with . The wires are made up in various lengths with keyed male and female endskeyed male and female ends——virtually foolproof. So all I had virtually foolproof. So all I had to do was screw together the cables and wire the one power to do was screw together the cables and wire the one power feed; everything came on, and the display recognized all feed; everything came on, and the display recognized all sensors and was ready to show me screens of info.sensors and was ready to show me screens of info. If I were If I were fitting out a new boat or refitting an old one, there’d be a fitting out a new boat or refitting an old one, there’d be a NMEA 2000 trunk running through her, and I’d be looking at NMEA 2000 trunk running through her, and I’d be looking at electronics, engines, and whatever other systems could take electronics, engines, and whatever other systems could take good advantage of it.” good advantage of it.” Used with permission. Ben Ellison, Used with permission. Ben Ellison, Power and Motor YachtPower and Motor Yacht


Presenter’s QualificationsPresenter’s Qualifications

•• 42 years in marine electronics industry42 years in marine electronics industry

•• Grew up on the ocean in a commercial fishing familyGrew up on the ocean in a commercial fishing family

•• Boating enthusiast Boating enthusiast –– many holidays spent sailingmany holidays spent sailing

•• Led new product development at Raytheon Marine, Standard Led new product development at Raytheon Marine, Standard Communications, RobertsonCommunications, Robertson--Shipmate, and SEAShipmate, and SEA--DatamarineDatamarine

•• NMEA Standards Committee chairman 1999NMEA Standards Committee chairman 1999--20042004

–– Maintained and updated NMEA 0183 standardMaintained and updated NMEA 0183 standard

–– Managed beta development to first official release NMEA 2000Managed beta development to first official release NMEA 2000®®

•• Have been active in NMEA, ABYC, SAE, and IECHave been active in NMEA, ABYC, SAE, and IEC


NMEA NMEA (National Marine Electronics Association)(National Marine Electronics Association)

•• Association of Marine Electronics: manufacturers, dealers, Association of Marine Electronics: manufacturers, dealers, sales reps, distributors, masssales reps, distributors, mass--merchantsmerchants

•• Has provided electronics interface standards since 1970’sHas provided electronics interface standards since 1970’s

•• Best known for NMEA 0183Best known for NMEA 0183

•• Publisher of Marine Electronics JournalPublisher of Marine Electronics Journal

•• NMEA programs raising level of marine electronics industry:NMEA programs raising level of marine electronics industry:

–– Installation Standards, CMET (Certified Marine Electronics Installation Standards, CMET (Certified Marine Electronics Technician), and installer certification programsTechnician), and installer certification programs

•• Cooperates with ABYC and NMMACooperates with ABYC and NMMA

•• Works closely with IECWorks closely with IEC

–– Global standardsGlobal standards


NMEA 0183 CommunicationsNMEA 0183 Communications•• NMEA 0183 introduced in 1983NMEA 0183 introduced in 1983

•• NMEA 0183 single talker, multiNMEA 0183 single talker, multi--listenerlistener

•• NMEA 0183 not a network (point to point communication)NMEA 0183 not a network (point to point communication)

•• Results in very complex wiring systemsResults in very complex wiring systems

Multiplexer


NMEA 0183 is OutdatedNMEA 0183 is Outdated

•• Communication Speed Communication Speed -- 4800 baud4800 baud or bits per secondor bits per second–– (A Seldom used version high(A Seldom used version high--speed 0183 is 38,400 baud) speed 0183 is 38,400 baud)

•• Typical 0183 message is 400 bits in sizeTypical 0183 message is 400 bits in size–– Result Result –– NMEA 0183 is limited to NMEA 0183 is limited to 12 messages per second12 messages per second

•• Compass: (requires Compass: (requires 15 messages per second15 messages per second))»» Heading Heading 1010 messages per second, messages per second,

»» rate of turn rate of turn 44 messages per second, messages per second,

»» vessel attitude vessel attitude 11 per second per second

•• Now consider Compass, GPS, Wind, Depth, Speed, Temp, Now consider Compass, GPS, Wind, Depth, Speed, Temp, AIS, etc.AIS, etc.

•• Message requirement climbs to more than Message requirement climbs to more than 100/second100/second

•• Very simply NMEA 0183 can’t handle this volume of trafficVery simply NMEA 0183 can’t handle this volume of traffic


Other NMEA 0183 Short ComingsOther NMEA 0183 Short Comings

•• Cable and connectors aren’t specified Cable and connectors aren’t specified –– Therefore PlugTherefore Plug--nn--play impossible play impossible

»» (each manufacturer uses different connectors)(each manufacturer uses different connectors)

•• No standardization of wire color codingNo standardization of wire color coding–– Reliability compromised as connection methods not specified, Reliability compromised as connection methods not specified,

corrosion due to poor wiring practices are common placecorrosion due to poor wiring practices are common place

•• Although NMEA 0183 is a standard, no certification processAlthough NMEA 0183 is a standard, no certification process–– Standard is implemented differently by various engineers Standard is implemented differently by various engineers

»» Leads to many interoperability issues (manufacturer A wont talk Leads to many interoperability issues (manufacturer A wont talk to to manufacturer B equipment)manufacturer B equipment)

•• Ambiguities within NMEA 0183 StandardAmbiguities within NMEA 0183 Standard–– Messages can be transmitted in one of several different sentenceMessages can be transmitted in one of several different sentences s

leading to interoperability problems between different manufactuleading to interoperability problems between different manufacturers’ rers’


Why CAN not Ethernet?Why CAN not Ethernet?

•• Frequently asked questionFrequently asked question

•• Ethernet has band width for video Ethernet has band width for video –– CAN doesn’tCAN doesn’t


Ethernet ProtocolsEthernet Protocols•• Ethernet protocols typically used for large data transfersEthernet protocols typically used for large data transfers

–– Examples of shipboard applications include radar images, chart mExamples of shipboard applications include radar images, chart maps, aps, weather overlay information, and echo sounder imagesweather overlay information, and echo sounder images

Black Box Radar

Black BoxEcho Sounder

Black BoxWeather

Ethernet Hub

Multi Function Display

0183Ports


Ethernet Protocols (Cont.)Ethernet Protocols (Cont.)

•• Marine examples include: Marine examples include: »» FurunoFuruno NavNet, Raymarine HSB2, Nobeltec black box radar and sounderNavNet, Raymarine HSB2, Nobeltec black box radar and sounder

•• These type standards are proprietary by manufacturerThese type standards are proprietary by manufacturer»» data can not be exchanged across various manufacturer’s productsdata can not be exchanged across various manufacturer’s products

•• Ethernet not typically used in industry for real time control Ethernet not typically used in industry for real time control »» (i.e., industrial, automotive, and aerospace industries CAN)(i.e., industrial, automotive, and aerospace industries CAN)

•• CAN is more cost effective than EthernetCAN is more cost effective than Ethernet

•• CAN is time determinate ensuring critical messages pass CAN is time determinate ensuring critical messages pass »» (Steering, throttle, and other safety critical data will get thr(Steering, throttle, and other safety critical data will get through in time) ough in time)


NMEA 2000NMEA 2000®® Because:Because:•• NMEA 0183 ShortNMEA 0183 Short--ComingsComings

–– PointPoint--toto--point point -- complex wiringcomplex wiring–– No physical layer specified No physical layer specified -- plugplug--nn--play impossibleplay impossible–– No realNo real--time data sharing between multiple equipmenttime data sharing between multiple equipment–– Lack of bandwidth for today's digital world Lack of bandwidth for today's digital world –– No certification process No certification process -- interoperability issuesinteroperability issues–– Interpretation ambiguities leads to interoperabilityInterpretation ambiguities leads to interoperability

•• Ethernet protocols ShortEthernet protocols Short--Comings Comings –– Not suitable real time control applicationsNot suitable real time control applications–– CostlyCostly for simple sensors (i.e., temperature, voltage, etc.)for simple sensors (i.e., temperature, voltage, etc.)–– More power consumption than CANMore power consumption than CAN


NMEA 2000NMEA 2000®® BeginningsBeginnings

•• NMEA 2000NMEA 2000®® has been in process of development since 1994 has been in process of development since 1994

•• Industry developed by 40 marine companies & organizationsIndustry developed by 40 marine companies & organizations

•• Development aided and guided by US Coast Guard, Development aided and guided by US Coast Guard, Oklahoma State University, Sun MicrosystemsOklahoma State University, Sun Microsystems

•• Developed in cooperation with: Developed in cooperation with:

–– Society of Automotive Engineers (Truck and Bus J1939)Society of Automotive Engineers (Truck and Bus J1939)

–– Agriculture and Forestry organizations (OffAgriculture and Forestry organizations (Off--road Vehicles)road Vehicles)

–– IEC and ISO (Global Organizations)IEC and ISO (Global Organizations)


NMEA 2000NMEA 2000®® Original ObjectivesOriginal Objectives•• Network standard Network standard ––

»» data streaming around boat being shared amongst various componendata streaming around boat being shared amongst various components ts

•• Facilitate real time control and command status informationFacilitate real time control and command status information»» Navigation Information (time, position, speed, heading, variatioNavigation Information (time, position, speed, heading, variation, rate of n, rate of

turn, set/drift, depth, waypoint, ETA, distance log, etc.)turn, set/drift, depth, waypoint, ETA, distance log, etc.)»» Autopilot control and status (rudder command, rudder angle, crosAutopilot control and status (rudder command, rudder angle, cross track s track

error, radius turn order, etc.)error, radius turn order, etc.)»» DriveDrive--byby--Wire Functions (electronic steering, throttle, shifting)Wire Functions (electronic steering, throttle, shifting)»» Engine/Transmission Monitoring (RPM, temperatures, pressures, voEngine/Transmission Monitoring (RPM, temperatures, pressures, voltages, ltages,

fuel rates, trim, etc.)fuel rates, trim, etc.)»» Vessel Monitoring System (pitch, roll, tank levels, batteries)Vessel Monitoring System (pitch, roll, tank levels, batteries)»» Electrical system control and status (DC/AC load switching and sElectrical system control and status (DC/AC load switching and status)tatus)»» Automatic Identification System (vessel data transmission and stAutomatic Identification System (vessel data transmission and status atus

reporting)reporting)»» Environmental Information (wind speed and direction, temperatureEnvironmental Information (wind speed and direction, temperature, ,

humidity, barometric pressure, sea temp, tide, current, salinityhumidity, barometric pressure, sea temp, tide, current, salinity, etc.), etc.)


NMEA 2000 Objectives (Cont.)NMEA 2000 Objectives (Cont.)

•• Bandwidth to accommodate future needsBandwidth to accommodate future needs

•• Specify physical layer (cable/connectors) Specify physical layer (cable/connectors) »» To ensure plugTo ensure plug--nn--play compatibilityplay compatibility

•• Product certification Product certification »» To reduce/eliminate outTo reduce/eliminate out--ofof--box interoperabilitybox interoperability

»» AutoAuto--addressing eliminating specialist to install addressing eliminating specialist to install

•• Cost effective to implement Cost effective to implement »» Limiting price increasesLimiting price increases

•• Time determinate Time determinate »» Protect missionProtect mission--critical data deliverycritical data delivery

•• Fail Safe and/or Redundant CapabilityFail Safe and/or Redundant Capability


NMEA 2000NMEA 2000®® Based on Based on CANCAN

•• Controller Area Network (Controller Area Network (CANCAN) platform for NMEA 2000) platform for NMEA 2000®®

–– CAN:CAN: highhigh--integrity serial data communications bus for realintegrity serial data communications bus for real--time time applicationsapplications

–– CAN CAN has excellent error detection and confinement capabilitieshas excellent error detection and confinement capabilities

–– CANCAN operates at data rates of up to 1 Megabits per secondoperates at data rates of up to 1 Megabits per second

–– CANCAN originally developed for automotive originally developed for automotive

»» now used by aerospace, industrial automation, and other industrinow used by aerospace, industrial automation, and other industries for real es for real time control and status applicationstime control and status applications

–– CANCAN is an international standard: ISO 11898is an international standard: ISO 11898


NMEA 2000NMEA 2000®® MessagingMessaging

•• Many industry groups use CAN platform and create their own Many industry groups use CAN platform and create their own messagingmessaging

–– Bus, truck, and agricultural industries created messaging standaBus, truck, and agricultural industries created messaging standard rd called J1939 (Used by called J1939 (Used by marine enginesmarine engines))

–– Industrial automation industry created messaging called DeviceNeIndustrial automation industry created messaging called DeviceNett

–– NMEA (NMEA (marine electronics industrymarine electronics industry) created messaging called NMEA ) created messaging called NMEA 2000® 2000®

•• NMEA 2000 currently has over 100 message types for NMEA 2000 currently has over 100 message types for exchanging information (And is growing)exchanging information (And is growing)

–– Position, heading, AIS, radar tracked targets, waypoints, cross Position, heading, AIS, radar tracked targets, waypoints, cross track track error, engine and transmission status, environmental, tanks, etcerror, engine and transmission status, environmental, tanks, etc..


Physical Interface (Cable and Connectors)Physical Interface (Cable and Connectors)

•• NMEA 2000NMEA 2000®® specifies cable/connectors ensuring plugspecifies cable/connectors ensuring plug--nn--play play •• Standardized Waterproof cableStandardized Waterproof cable

»» 5 conductor (2 wires for data, 25 conductor (2 wires for data, 2--wires for power and ground, 1 shield)wires for power and ground, 1 shield)»» Data pair independently shielded, power pair independently shielData pair independently shielded, power pair independently shielded, plus ded, plus

overall shield encompassing data and power pairsoverall shield encompassing data and power pairs»» Color coded wires reducing wiring errorsColor coded wires reducing wiring errors

•• Standardized waterproof connectorsStandardized waterproof connectors»» Can be submerged in the bilge and still operateCan be submerged in the bilge and still operate»» Keyed contact insuring correct wiringKeyed contact insuring correct wiring»» Gold plated terminals for reliable connectionsGold plated terminals for reliable connections»» Threaded connectors prevent inadvertent disconnectsThreaded connectors prevent inadvertent disconnects»» No expertise or training requiredNo expertise or training required

•• Engineered for ServiceabilityEngineered for Serviceability»» Device can be plugged or unplugged without powering down networkDevice can be plugged or unplugged without powering down network»» Device failure or removal of product does not effect rest of netDevice failure or removal of product does not effect rest of networkwork


NMEA 2000NMEA 2000®® Cable and AccessoriesCable and Accessories

Bulk Cable Double Ended Cordset Terminators Powertaps

Field Attachable Connector

Multi Port Box Bulkhead Feed thru Tee Connector


Cable and Connector Cable and Connector System TypesSystem Types

•• Micro CMicro C cable and connectors (cable and connectors (thinthin))–– Device power directly from cable up to 1 ampDevice power directly from cable up to 1 amp–– Supports up to 4 amps of current in any given branchSupports up to 4 amps of current in any given branch–– Micro trunk line up to 100 meters or 328 feetMicro trunk line up to 100 meters or 328 feet–– Maximum drop line length of 6 meters or 19 feetMaximum drop line length of 6 meters or 19 feet

•• MiniMini cable and connectors (cable and connectors (thickthick))–– Device power up to 1 ampDevice power up to 1 amp–– Supports up to 8 amps of current in any given branchSupports up to 8 amps of current in any given branch–– Mini trunk line lengths up to 200 meters or 656 feetMini trunk line lengths up to 200 meters or 656 feet–– Maximum drop line length 6 meters or 19 feetMaximum drop line length 6 meters or 19 feet


CompassDisplay Display

Cordset

Tee TeeTee

TeeCordset Terminator

Cordset

Powertap

To Power Supply

TeeCordsetTerminator CordsetCordset

Tee

To Computer

NMEA 2000® / USB Gateway

GPS Antenna / Receiver

Cordset

Depth / Speed / Temperature

BulkCable

FieldAttachableConnectors

NMEA 2000 NMEA 2000 ®® Network Connection ExampleNetwork Connection Example


NMEA 2000NMEA 2000®® Certification ProcessCertification Process

•• A device claiming NMEA 2000A device claiming NMEA 2000®® must be certifiedmust be certified

–– Copyrighted term illegal to claim without certificationCopyrighted term illegal to claim without certification

–– Each certified product has submitted an electronic fileEach certified product has submitted an electronic file

»» Proves product behavior and other parameters are correctProves product behavior and other parameters are correct

•• Certification facilitates plugCertification facilitates plug--nn--playplay

–– Interpretation ambiguities removedInterpretation ambiguities removed

–– AutoAuto--addressing like printer connection to computeraddressing like printer connection to computer

•• NMEA 2000NMEA 2000®® guarantees backward compatibilityguarantees backward compatibility

–– Older product will not be made obsoleteOlder product will not be made obsolete


NMEA 2000 NMEA 2000 ®® Open Standard vs. ProprietaryOpen Standard vs. Proprietary

•• Universally open standard meansUniversally open standard means

–– Any manufacturer can participateAny manufacturer can participate

–– End user of products can make choices between brandsEnd user of products can make choices between brands

–– Free Enterprise philosophyFree Enterprise philosophy

•• Proprietary standard meansProprietary standard means

–– A company decides which of its competitors may or may A company decides which of its competitors may or may not participate and under what termsnot participate and under what terms

–– End user has only the options that the manufacturer End user has only the options that the manufacturer decidesdecides

–– Dictatorial philosophyDictatorial philosophy


Certified Products as of 9/22/05Certified Products as of 9/22/05

•• AirmarAirmar Smart Depth NMEA 2000® Depth, Speed and Temperature Smart Depth NMEA 2000® Depth, Speed and Temperature

•• Volvo Volvo PentaPenta Engine Gateway EVC system. Engine Gateway EVC system.

•• Outboard Engine Controller Outboard Engine Controller Evinrude'sEvinrude's V4 and V6 ETEC outboards V4 and V6 ETEC outboards

•• FariaFaria NMEA Info Center RPM, boost pressure, oil pressure, coolant NMEA Info Center RPM, boost pressure, oil pressure, coolant temperature, battery voltage etc. temperature, battery voltage etc.

•• FariaFaria MiniMini--gateway RPM, Boost pressure, Oil pressure, Coolant gateway RPM, Boost pressure, Oil pressure, Coolant Temperature, Battery Voltage etc. Temperature, Battery Voltage etc.

•• KvaserKvaser Neptune Gateway between NMEA 0183 and NMEA 2000®.Neptune Gateway between NMEA 0183 and NMEA 2000®.

•• LowranceLowrance EP 15 fluid level sensor EP 15 fluid level sensor

•• LowranceLowrance EP 20 Suzuki engine interface EP 20 Suzuki engine interface

•• LowranceLowrance EP 10 fuel flow sensor EP 10 fuel flow sensor

•• LowranceLowrance EP 25 paddle wheel speed sensor EP 25 paddle wheel speed sensor

•• LowranceLowrance EP 35 temperature sensor EP 35 temperature sensor


Cont’d Certified ProductsCont’d Certified Products

•• Maretron DST100 Depth/speed/temperature Maretron DST100 Depth/speed/temperature

•• Maretron N2KMeter Diagnostic tool of NMEA 2000® Maretron N2KMeter Diagnostic tool of NMEA 2000®

•• Maretron GPS100 12 channel with automatic WAAS Maretron GPS100 12 channel with automatic WAAS

•• Maretron DSM200 displays all data numerically or graphically.Maretron DSM200 displays all data numerically or graphically.

•• Maretron USB100 Gateway for USB using NMEA0183 Maretron USB100 Gateway for USB using NMEA0183

•• Maretron SSC200 SolidMaretron SSC200 Solid--state ratestate rate--gyro compass gyro compass

•• Maretron NMEA 2000® Maretron NMEA 2000® Cables/Connector approved for NMEA 2000®.Cables/Connector approved for NMEA 2000®.

•• Offshore Systems ( UK) Ltd. Capacitive Fuel Level Sender Offshore Systems ( UK) Ltd. Capacitive Fuel Level Sender

•• Offshore Systems ( UK) Ltd. Tank Sender Adaptor levels from FuelOffshore Systems ( UK) Ltd. Tank Sender Adaptor levels from Fuel, , Freshwater, Wastewater, Freshwater, Wastewater, BlackwaterBlackwater, Oil and Live Well senders, Oil and Live Well senders



•• Raymarine Raymarine ST 290 Data processing unitST 290 Data processing unit of the new ST290 rangeof the new ST290 range

•• RaymarineRaymarine E80/E02011E80/E02011--Colour Radar/Chart PlotterColour Radar/Chart Plotter

•• RaymarineRaymarine E120/E2013E120/E2013-- ColourColour Radar/ Chart PlotterRadar/ Chart Plotter

•• Simrad Simrad RFC35RRFC35R--20002000 RatesensorRatesensor stabilized fluxgate compass. stabilized fluxgate compass.

•• SimradSimrad AP25AP25 Autopilot. Autopilot.



•• SimradSimrad AT44AT44 Converter Converter

•• SimradSimrad CP31/CX33CP31/CX33 CombiCombi

•• SimradSimrad CX34CX34 CombiCombi NavNav system system

•• SimradSimrad EQ33EQ33 Echo Sounder Echo Sounder

•• SimradSimrad IS12IS12 CombiCombi. .

•• SimradSimrad IS12IS12 Compass. Compass.



•• Teleflex Teleflex i6000 Shift and Throttle Control Systemi6000 Shift and Throttle Control System for Boat Enginefor Boat Engine

•• Yamaha Marine Yamaha Marine 6Y883688 Triducer6Y883688 Triducer

•• Yamaha MarineYamaha Marine 6Y88350T10 Tachometer Square6Y88350T10 Tachometer Square

•• Yamaha MarineYamaha Marine 6Y88350S00 Speedometer/Fuel Management Square6Y88350S00 Speedometer/Fuel Management Square

•• Yamaha MarineYamaha Marine 6Y88350010 Speedometer/Fuel Management Round6Y88350010 Speedometer/Fuel Management Round

•• Yamaha MarineYamaha Marine 6Y88350T00 Tachometer Square6Y88350T00 Tachometer Square

•• Yamaha MarineYamaha Marine 6Y88350F00 Fuel Management Square6Y88350F00 Fuel Management Square

•• Yamaha MarineYamaha Marine 6Y88350000 Speedometer Square6Y88350000 Speedometer Square


NMEA 2000NMEA 2000®® SummarySummary

•• Network standard Network standard »» Engineered for onboard vessel real time control and status commuEngineered for onboard vessel real time control and status communicationnication

•• Designed for today and future vessel networkingDesigned for today and future vessel networking•• Robust cable system Robust cable system

»» With plugWith plug--nn--play compatibility across different manufacturers’ productsplay compatibility across different manufacturers’ products

•• Simplicity in connectSimplicity in connect--ability ability •• Product certification Product certification

»» Reduces interoperability issues between different manufacturers’Reduces interoperability issues between different manufacturers’ productsproducts

•• Cost effective and proven CAN technology Cost effective and proven CAN technology »» Used in many different industries for real time control and statUsed in many different industries for real time control and statusus

•• Time determinate system Time determinate system »» Ensures critical messages always get through in timeEnsures critical messages always get through in time

•• Accommodates fail safe or redundant systemsAccommodates fail safe or redundant systems»» Concerns for safetyConcerns for safety


Industry Expert Opinion on NMEA 2000Industry Expert Opinion on NMEA 2000®®

"I am convinced that networked electronics and, to an "I am convinced that networked electronics and, to an even greater extent, the application of the same even greater extent, the application of the same technology to wholetechnology to whole--boat power distribution boat power distribution systems, will result in the greatest revolution in boat systems, will result in the greatest revolution in boat systems that we have seen in at least three decades. systems that we have seen in at least three decades. The NMEA, with its NMEA 2000The NMEA, with its NMEA 2000®® protocol and protocol and corresponding 'physical layer', is in the forefront of corresponding 'physical layer', is in the forefront of this revolution, and playing a powerful leadership this revolution, and playing a powerful leadership role." role." Used with permission. Nigel CalderUsed with permission. Nigel Calder


THE ENDTHE END

nmea 2000® importance to boat builders nmea 2000® importance to boat builders

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