Jrc Nmea Speed Log Manual



NMEA 0183 is a combined electrical and data specification for communication between marine electronic devices such as echo sounder, sonars, anemometer,gyrocompass, autopilot, GPS receivers and many other types of instruments. It has been defined by, and is controlled by, the U.S.-based National Marine Electronics Association.It replaces the earlier NMEA 0180 and NMEA 0182 standards. In marine applications it is slowly being phased out in favor of the newer NMEA 2000 standard.

View and Download JRC ECDIS instruction manual online. Log (at selection of Log(NMEA)) Fixed to 4800 Log. When Log Selector is installed and the Log (speed. The free CAN Log Viewer software (available at www.yachtd.com) works under Microsoft Windows, Linux and Mac OS X. It allows viewing NMEA 2000 and J1939 messages and data in real time, configuring NMEA 2000 devices and updating firmware of products of our company. We hope that you will like this tiny, low-power, but powerful device.

NMEA-0180 and 0182 are very limited, and just deal with communcations from a Loran-C (or other navigation receiver, although the standards specifically mention Loran), and anautopilot.

NMEA 0183 versions:
NMEA 2.00 Published January 1992 (NMEA 0183 migrated from RS 232 to RS422)
NMEA 2.01 Published August 1994
NMEA 2.10 Published October 1995
NMEA 2.20 Published January 1997
NMEA 2.30 Published March 1998
NMEA 3.00 Published July 2000
NMEA 3.01 Published January 2002
NMEA 4.00 Puiblished November 2008

Jrc Nmea Speed Log Manual

NMEA 2000 is a protocol used to create a network of electronic devices—chiefly marine instruments—on a boat. Various instruments that meet the NMEA 2000standard 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 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 talk and listen to each other.

Serial configuration for NMEA-0183

Baud rate4800
ParityNone
Data bits8
Stop bits1
HandshakeNone

NMEA-0183 prefixes (Talker IDs)

NMEA protocol can be sent by different equipment. It can be identified by so called Talker Id. Most known one is, of course $GP___ - GPS.
  • GL - GLONASS Receiver
  • GP - Global Positioning System (GPS)
  • Heading Track Controller (Autopilot): General - AG, Magnetic - AP
  • AI - Automatic Identification System
  • CD - Digital Selective Calling (DSC)
  • CR - Data Receiver
  • CS - Satellite
  • CT - Radio-Telephone (MF/HF)
  • CV - Radio-Telephone (VHF)
  • CX - Scanning Receiver
  • DE - DECCA Navigator
  • DF - Direction Finder
  • EC - Electronic Chart System (ECS)
  • EI - Electronic Chart Display & Information System (ECDIS)
  • EP - Emergency Position Indicating Beacon (EPIRB)
  • ER - Engine room Monitoring Systems
  • GN - Global Navigation Satellite System (GNSS)
  • HC - HEADING SENSORS: Compass, Magnetic
  • HE - Gyro, North Seeking
  • HN - Gyro, Non-North Seeking
  • II - Integrated Instrumentation
  • IN - Integrated Navigation
  • LC - Loran C
  • P - Proprietary Code
  • RA - Radar and/or Radar Plotting
  • SD - Sounder, depth
  • SN - Electronic Positioning System, other/general
  • SS - Sounder, scanning
  • TI - Turn Rate Indicator
  • VD - VELOCITY SENSORS: Doppler, other/general
  • VM - Speed Log, Water, Magnetic
  • VW - Speed Log, Water, Mechanical
  • VR - Voyage Data Recorder
  • YX - Transducer
  • ZA - TIMEKEEPERS, TIME/DATE: Atomic Clock
  • ZC - Chronometer
  • ZQ - Quartz
  • ZV - Radio Update
  • WI - Weather Instruments

Standard NMEA-0183 messages description

LogThere are many sentences in the NMEA standard for all kinds of devices that may be used in a Marine environment. Some of the ones that have applicability to gps receivers are listed below: (all message start with GP.)
  • AAM - Waypoint Arrival Alarm
  • ALM - Almanac data
  • APA - Auto Pilot A sentence
  • APB - Auto Pilot B sentence
  • BOD - Bearing Origin to Destination
  • BWC - Bearing using Great Circle route
  • DTM - Datum being used.
  • GGA - Fix information
  • GLL - Lat/Lon data
  • GRS - GPS Range Residuals
  • GSA - Overall Satellite data
  • GST - GPS Pseudorange Noise Statistics
  • GSV - Detailed Satellite data
  • MSK - send control for a beacon receiver
  • MSS - Beacon receiver status information.
  • RMA - recommended Loran data
  • RMB - recommended navigation data for gps
  • RMC - recommended minimum data for gps
  • RTE - route message
  • TRF - Transit Fix Data
  • STN - Multiple Data ID
  • VBW - dual Ground / Water Spped
  • VTG - Vector track an Speed over the Ground
  • WCV - Waypoint closure velocity (Velocity Made Good)
  • WPL - Waypoint Location information
  • XTC - cross track error
  • XTE - measured cross track error
  • ZTG - Zulu (UTC) time and time to go (to destination)
  • ZDA - Date and Time
Some gps receivers with special capabilities output these special messages.
  • HCHDG - Compass output
  • PSLIB - Remote Control for a DGPS receiver

What information each NMEA v3 sentence contains

Jrc Nmea Speed Log Manual Online

Standard NMEA sentences being used by most of GPS receivers.

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NMEA MessageUTC date/timePositionCourseSpeed
RMC++++
GGA++
GLL++
ZDA+
GNS++
HDT,HDG,HMR+
VBW,VHW,VTG++
BEC,BWC,BWR+

General Sentence Format

All data is transmitted in the form of sentences. Only printable ASCII characters are allowed, plus CR(carriage return) and LF (line feed). Each sentence starts with a '$' sign and ends with CRLF. Thereare three basic kinds of sentences: talker sentences, proprietary sentences and query sentences.Talker Sentences. The general format for a talker sentence is:
The first two letters following the „$” are the talker identifier. The next three characters (sss) are thesentence identifier, followed by a number of data fields separated by commas, followed by an optionalchecksum, and terminated by carriage return/line feed. The data fields are uniquely defined for eachsentence type.

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Sentence Identifiers and Formats

Global Positioning System Fix Data. Time, Position and fix related data for a GPS receiver
GLL Geographic Position – Latitude/Longitude
GSA GPS DOP and active satellites
GSV Satellites in view
HDT Heading – True
RMC Recommended Minimum Navigation Information