4. INSTALLATION

Output data description

NRX: New NAVTEX received message

The NRX sentence is used to transfar the contents of a received NAVTEX message from the NAVTEX receiver to another device. As the length of a single NAVTEX message may exceed the number of characters permitted in a single sentence, many NRX sentences may be required to transfer a single NAVTEX message.

$CRNRX,xxxx,x,x,x,xx,xx,xxxx,hhmmss,x.x,n--n*hh<CR><LF>

encapsulated message error rate % (xx.x)

UTC of receipt of message year

month (1-12) day (0-31)

freq ('490', '518' or '4209')

number of lines in message (1 to 999) line number (1 to 999)

message identifier (B1B2B3B4)

NOTE 1: The total number of sentences required to transfer the NAVTEX message from the NAVTEX radio receiver. The first field specifies the total number of sentences used for a message, minimum value 1. The Sentence Number field identifies the older of this sentence in the message, minimum value 1. All sentences contain the same number of fields. For efficiency it is recommended that null fields be used in the additional sentences where the data is unchanged from the first sentence (this applies to fields 4 through 12).

NOTE 2: The sequential message identifier provides a unique identifier for each NAVTEX message represented by a group of sentences. Though the message code (field 4) contains a NAVTEX message serial number, there are special cases when the message serial number is set to 00 and has a different meaning or when the same message code can occur more than once. When these conditions occur, the sequential message identifier can be relied upon to uniquely identify this NAVTEX message from other NAVTEX messages with the same message code.

NOTE 3: The NAVTEX message code contains three related entities. The first character identifies the transmitter coverage area and the second character identifies the type of message. Both these characters are as defined in Table I of Recommendation ITU-R M.625-3, combination numbers 1-26. Transmitter identification characters are allocated by the IMO NAVTEX manual (IMO publication 951E). The remaining two characters are restricted to numerals with a range of 00 to 99 and represent a serial number for each type of message. The value of 00 is a special case and not considered a serial number.

NOTE 4: The frequency indicator identifies the frequency that the NAVTEX message was received on:

0 = not received over air (eg test messages)

1 = 490 kHz

2 = 518 kHz

3 = 4209,5 kHz

4 through 9 are reserved for future use

NOTE 5: The total number of characters indicates the expected size of the message body sent in this sequence of NRX sentences. It does not include the additional overhead for reserved characters found in table 1 of IEC 61162-1.

NOTE 6: Status “A” is used for syntactically correct message reception. Status “V” is used for syntactically incorrect message reception, e.g. end characters NNNN missing.

NOTE 7: The message body may contain reserved characters as defined in IEC 61162-1.

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Furuno NX-700A/B manual Output data description NRX New Navtex received message
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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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