Automatic / manual turning; 1kH, 2W (external speaker output) External inputs (1)Gyro compass (sync / step / NMEA format) (2)Speed log (Pulse / NMEA format) (3)Tidal current meter (NMEA / JRC format) (4)GPS position data (NMEA format) (5)Fish finder (6)Net depth meter Power supply. With excellent linearity and a resolution of 0.1 Knot, over the range 0.2 to 40 Knots, the log sensor sends signals to a control box which then converts the sensor signal to boat speed, trip and total distance. This data is transmitted in NMEA 0183 format to a new Clipper EM Log display unit. Click here for PDF Instruction manual. Jrc All AIS Antenna BNWAS Bridge CCTV Compass Conning Doppler current meter ECDIS Echo sounder EPIRB Fish finder FleetBroadband Global Xpress GPS/DGPS Inmarsat C MF/HF Multi Info Display Navtex NeCST PA Pilot Plotter Radar Remote support Repeater Satellite log Sonar Sound reception Speed log Telephone system UHF VDR/S-VDR VHF VSAT Weatherfax.
Features
The JLN-205Mk2 is a stable and highly accurate measurement tool to ensure stable speed data utilizing high frequencies ultrasonic waves.
Dual color LED backlight
The JRC MID incorporates many display modes readily available on a highly visible 4.5-inch LCD display. Besides the display being fully dimmable and having backlit keys, it features dual LED backlight (white and orange), making it easy to operate in various light settings on the bridge.
Clear view
Multiple display modes are available from the menu with main data displayed in large characters for easy reading. You can easily switch at your own convenience, particularly useful when a situation requires specific information.
Transducer
The transducer is compact and constructed of light weight moulded rubber, to minimize the effects on aeration, which allows stable and accurate operation.
Gate valve
Using an optional gate valve transducer allows for long-term cost saving and easy maintenance as dry docking is not necessary.
Error free
An ultrasonic beam is transmitted in fore and aft directions. At the same time, the hull motions such as rolling and pitching are detected and removed by simply measuring the difference of the Doppler shift reception signal, ensuring accurate and stable speed data, even in the roughest conditions.
Uniform operation
In keeping with the company’s philosophy of an easy to use Man Machine Interface, the new generation displays have allowed JRC’s engineers to develop an exciting new software approach for uniform operation.
Flexible data and dimmer share
The display of the JLN-205Mk2 can be purchased separately as Multi Info Display (MID). It allows full NMEA0183 data share for up to 10 displays and can be flexibily installed. The same applies for dimmer share. By changing the intensity on one of the units, it automatically shares the new settings to the other displays. Sample:
In this sample, the display with ID4 receives data (RS-422) from signal distributor and outputs vessel speed data (RS-485) to all connected display. Dimmer share has been separated in two groups, whereas group 1 can be operated by external dimmer and group 2 is linked pressing the button on the display.
Signal processor
This speed log incorporates a highly reliable interfacing field. You can easily connect a wide range of additional equipment to optimize your configuration. A second display, smaller remote displays and analogue indicators are just a few of the possibilities. The JLN-205Mk2 can also output the measurement information to radar and ecdis.
Signal distributor
The transducer room has a quite bad environment with regard to vibration and humidity, therefore, before signal is distributed to various equipment, the transducer is directly connected to the processor, minimizing loss of signal and extending cable length to hundreds of meters.
No flush mount kit
With JRC's new design approach, a flush mount kit is not required and screws are nicely concealed behind the front cover.
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.
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
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
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 rate | 4800 |
Parity | None |
Data bits | 8 |
Stop bits | 1 |
Handshake | None |
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
There 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
- HCHDG - Compass output
- PSLIB - Remote Control for a DGPS receiver
What information each NMEA v3 sentence contains
Standard NMEA sentences being used by most of GPS receivers.NMEA Message | UTC date/time | Position | Course | Speed |
RMC | + | + | + | + |
GGA | + | + | ||
GLL | + | + | ||
ZDA | + | |||
GNS | + | + | ||
HDT,HDG,HMR | + | |||
VBW,VHW,VTG | + | + | ||
BEC,BWC,BWR | + |
Jrc Nmea Speed Log Manual User
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.
Jrc Nmea Speed Log Manual Transmission
Sentence Identifiers and Formats
Global Positioning System Fix Data. Time, Position and fix related data for a GPS receiverGLL Geographic Position – Latitude/Longitude
GSA GPS DOP and active satellites
GSV Satellites in view
HDT Heading – True
RMC Recommended Minimum Navigation Information