Furuno NX-700A 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 00015280401 Important Notice Safety Instructions Safety information for the Installer Forword Features Table of Contents Vii Equipment Lists Name Type Code No Qty RemarksOptional Supply Name Type Code No QtyPower 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-7001-AN-J*/E*,NX-7001-BN-J*/E NX-7001-AA-J*/E*、NX-7001-BA-J*/E 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 08AW-X-9407 004-514-610 08AW-X-9404 Spare Parts List for Page Page Page Page Page 空中線部 外寸図 ナブテックス受信機 Index Processing

NX-700A specifications

The Furuno NX-700A is an advanced navigation system designed specifically for professional mariners and commercial vessels. Known for its robust performance and precision, it integrates state-of-the-art technology to enhance safety and efficiency at sea. One of the most notable features of the NX-700A is its dual-channel frequency system, which allows for improved target detection and tracking capabilities. This dual-channel operation ensures that the system can differentiate between multiple targets, reducing the risk of collisions and enhancing situational awareness.

Another significant aspect of the NX-700A is its high-resolution display. The system is equipped with a large LCD screen that provides clear and detailed graphical representations of surrounding waters, including navigational aids and potential hazards. The intuitive interface allows for easy operation even in challenging conditions, ensuring that crews can concentrate on their primary task: safe navigation.

Further enhancing the usability of the NX-700A is its advanced GPS functionality. The system employs multi-GNSS (Global Navigation Satellite System) technology, enabling it to obtain accurate position fixes from various satellite constellations, including GPS, GLONASS, and BeiDou. This capability ensures that mariners receive reliable positioning data regardless of their location, which is crucial during navigation in remote areas.

The NX-700A also features robust connectivity options, including NMEA 2000 and NMEA 0183 support. This allows the system to interface seamlessly with other onboard equipment, such as autopilots, engine monitoring systems, and electronic chart plotters. Such integration enhances operational efficiency and aids in maintaining a central command point for navigation.

Marine safety is further bolstered with the NX-700A's built-in man-overboard function, which provides rapid and precise positioning information in emergency situations. The system can also store critical navigational data, which can be accessed quickly during emergencies, contributing to enhanced safety protocols on board.

In summary, the Furuno NX-700A is a sophisticated navigation solution that combines high-resolution displays, advanced GPS technology, dual-channel frequency systems, and robust connectivity. Whether used in fishing vessels, cargo ships, or pleasure yachts, the NX-700A stands out as a reliable tool for enhancing maritime safety and navigation efficiency. With its user-friendly interface and essential features, it embodies the modern requirements of marine navigation technology.
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