Furuno NX-700A/B 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:

reserved presently not used

B:

meteorological warning

J:

SATNAV message

C:

ice report

K:

other electronic navigational

 

 

 

 

 

 

 

 

 

 

 

 

 

 

aid system message

D:

search and rescue information/piracy

L:

navigational warning (additional)

 

and armed robbery

 

 

 

 

 

 

 

E:

meteorological forecast

M to Y: reserved presently not used

F:

pilot message

 

 

 

 

 

 

 

G:

AIS

 

 

 

 

 

 

 

H:

LORAN-C message

Z:

QRU (no message on hand)

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Contents Navtex Receiver 00015280413 Important Notice Safety Instructions Safety information for the Installer Forword Features Table of Contents Vii Equipment Lists Name Type Code No Qty RemarksOptional Supply System Configurations Receiver UnitNavtex 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 messageMain menu Choosing the Receive ModeMask mode options Navtex menuEditing the Settings for Station and Message Choosing the Local FrequencyRcv Mask Auto Edit window ex. Rcv MaskWhen receiving SAR Search and Rescue message Switching the Frequency to DisplayAlarm Messages When receiving Warning message A/B/LList options Processing MessagesChoosing messages to display Urgent messageAll Messages Protecting message from deletingPrinting all messages displayed Canceling printingPrinting Messages Print optionsAdding Navtex station Service menuEditing the Navtex Station List Edit station list displayNavArea New addition windowDeleting Navtex stations Editing Navtex stationEdit window Ex. Navtex station Oostende Message 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 blank Maintenance program Maintenance & TroubleshootingMaintenance Check point RemedyFuse Replacement of Fuse, Battery and Thermal PaperBattery LCD DisplayThermal paper NX-700A only Troubleshooting Key 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 cableExtending antenna cable length GroundingSetting of Printer NavtexDigital Interfacing PriorityGLL Latitude and longitude NRM Navtex receiver mask RMC Recommend Minimum Specific Gnss Data ZDA Time and date $--ACK,xxx*hhCRLF Local alarm numberidentifier Checksum ACK AcknowledgeVHW Water speed and heading VTG Course over ground and ground speedVBW Dual ground/water speed PFEC,nxfrq Local FrequencyOutput 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 08AW-X-9402 08AW-X-9403 Installation Materials 08AW-X-9404 000-157-479-10 Page Page Page Page Page 取付位置 Navtex Receiver Index Processing0560

NX-700A/B specifications

The Furuno NX-700A/B is a sophisticated, state-of-the-art navigation system designed for maritime use, tailored to meet the demands of modern seafarers. This advanced device provides exceptional performance and a plethora of features that enhance safety and efficiency on the water.

One of the standout features of the NX-700A/B is its high-resolution display, which offers clear and intuitive presentation of navigation information. With a user-friendly interface, mariners can easily access vital data such as vessel tracking, waypoint management, and route planning. The screen's brightness adjustment ensures optimal visibility in various lighting conditions, making it suitable for both day and nighttime operations.

The NX-700A/B is equipped with cutting-edge GPS technology, providing accurate positioning and navigation capabilities. Its integration with other onboard systems allows for seamless communication and data sharing, thereby enhancing situational awareness. This connectivity is further bolstered by the inclusion of NMEA 0183 and NMEA 2000 protocols, which ensure compatibility with numerous marine instruments and equipment.

Another significant advantage of the NX-700A/B is its robust data logging capabilities. The system can store navigation history and track performance over time, enabling mariners to analyze their journeys and make informed decisions for future voyages. This feature is particularly valuable for fleet management and safety audits.

Safety is paramount in maritime operations, and the NX-700A/B incorporates advanced radar technology to detect and monitor surrounding vessels and obstacles. The radar display complements the navigation data, providing an additional layer of situational awareness, crucial for avoiding collisions and ensuring safe passage.

The NX-700A/B also offers a range of customization options, allowing users to tailor the interface and functionality to their specific needs. From adjusting alarms and notifications to configuring display settings, mariners can create a navigation experience that maximizes their operational efficiency.

In summary, the Furuno NX-700A/B stands out as a premier navigation solution for maritime professionals. With its high-resolution display, advanced GPS technology, robust data logging, integrated radar capabilities, and customizable features, it is designed to enhance safety and operational performance on the water. Whether for recreational boating or commercial shipping, the NX-700A/B is an invaluable tool that meets the rigorous demands of today's maritime environment.
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