Furuno NX-700B manual Message Format, Nnnn

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1. PRINCIPLE OF NAVTEX SYSTEM

1.3Message Format

For automatic identification of messages, each message starts with nine control characters, called “Header codes”.

The first five characters are always “ZCZC_“ and common to all messages. This part is used for message synchronization. The latter four characters are designed as B1, B2, B3 and B4 indicate origin, category and serial number of the message.

Character B1 is the identification letter of the Navtex station “A” thru “Z”. Character B2 indicates the type of message. “A” thru “Z”, as listed below. Character B3 and B4 indicate the serial number of the message. The serial numbers are counted up from “01” to “99”, and starts from “01” again. Number “00” is specially reserved for important emergency messages.

The end of each message is indicated by “NNNN” (four successive N’s). General message format is summarized below.

 

 

 

Header code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

main message

 

NNNN

 

ZCZC B1 B2 B3 B4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Start code

 

 

 

 

 

 

 

 

Main message

Termination code

 

(sync)

 

 

 

 

 

Serial number

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"00":

Emergency message

 

 

 

 

 

 

 

 

 

 

"01" - "99": Normal message

 

 

 

 

 

 

 

 

 

Type of message

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"A" - "Z"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(See the list below.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Station ID

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"A" - "Z"

 

 

 

 

 

 

[Type of message (category)]

 

 

 

 

 

 

 

A:

Navigational warning

I:

Spare

 

 

 

 

B:

Meteorological warning

J:

SATNAV message

C:

Ice report

K:

Other electronic navigational aid

 

 

 

 

 

 

 

 

 

 

 

 

 

 

system message

D:

Search and rescue information/pirate

L:

 

attack warnings

 

E:

Meteorological forecast

V to Y

F:

Pilot message

 

G:

AIS

 

H:

LORAN message

Z:

Navigational warning (addition to “A”)

Special services allocation by the NAVTEX Co-ordinating Panel

QRU (no message on hand)

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Contents Navtex Receiver 00015280402 Important Notice Safety Instructions Safety information for the Installer Forword Features Table of Contents Vii Equipment Lists Name Type Code No Qty RemarksOptional Supply Power supply 100-115 12-24 VDC System ConfigurationsPower supply NX-700B NX-700A NX-7H Max mNavtex System Operation Principle of Navtex SystemHow Navtex Works Message Format NnnnNavtex Station Map Navtex Station List III NAV Latitude Longitude Freq Area Station Broadcast schedule UTC XII Turning the Unit On/Off OperationOperating Controls Display unit, front viewAdjusting LCD Dimmer All message display 518 kHzOther messages Confirming the New MessageSAR Search and Rescue message Sample Messages Message list Detailed messageMenu Choosing the Receive ModeSystem Display Service AutoLocal channel options Editing the Settings for Station and MessageChoosing the Local Frequency Rcv Station & MsgMessage Rcv Station & Msg AutoStation Edit window ex. Rcv Station & Msg518 Press 490 Switching the Frequency to DisplayAlarm Messages List options Processing MessagesChoosing messages to display Urgent messageProtecting message from deleting Alarm Messages User Messages Good Messages Lock MessagePrinting Messages Printing all messages displayedPrinting each message Canceling printingOff All Printing messages automatically518kHz Editing the Navtex Station ListINS Output Speed NavArea490kHz ID1 ID2 ID3 4209.5kHz Latitude 00NLongitude 00E 518kHz ID1 ID2 ID3 Range 400nm Save data ?Latitude 11N OostendeStation Oostende Longitude 48E 518kHz ID1 T ID2 ID3Message icon shown next to messages IconsIcon Status Meaning Status icon shown at the tip of display Messages List Message Meaning RemedySystem menu Other FunctionsNavtex menu Nav Data Display menu Description SettingSkips to $$ DistanceService menu Description Setting INSThis page is intentionally left be blank Maintenance program Maintenance & TroubleshootingMaintenance Check point RemedyFuse Replacement of Fuse, Battery and Thermal PaperBattery LCD DisplayThermal paper NX-700A only Troubleshooting SELET/READYKey test DiagnosticsMemory test Restoring all Default Settings Rx testTabletop, overhead mounting InstallationDisplay Unit For NX-700B Flush mountingFor NX-700A Mounting Method Receiver UnitGeneral mounting considerations Antenna Unit Mounting considerationsWiring Printer NX-700B onlyReceiver unit Receiver unit, inside viewHow to use J402 and 403 connector TTYCS-1Q For Navigator or INSAntenna cable For RG-10/UY, RG-214 cableGrounding OP04-2 To Receiver unit FMA-1 connectorExtending antenna cable length None Setting of PrinterSystem Upright InvertedDigital Interfacing PriorityGLL Latitude and longitude RMC Recommend Minimum Specific Gnss Data ZDA Time and date NRQ Request Navtex messages NMK Set Navtex mask$--ACK,xxx*hhCRLF Local alarm numberidentifier Checksum ACK AcknowledgeVHW Water speed and heading VTG Course over ground and ground speedVBW Dual ground/water speed Output data description NRX New Navtex received message ALR Set alarms Serial InterfaceMenu Tree NavtexFuruno Specifications of Navtex Receiver Furuno Packing List NX-700B/NX-700B-HK/NX-700B-R NX-7001-AN*/BN*/-R NX-7001-AA-*/BA NX-7H-0-10/-10-HK,NX-7H-0-20/-20-HK 工事材料表 004-514-530 08AW-X-9402 004-514-540 08AW-X-9403 Installation Materials 004-514-610 08AW-X-9404 Spare Parts List for Page Page Page Page Page 取付位置 NX-700A/B Index Processing0560