Japan Radio Co. JLN-740A, Instruction Manual

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Chapter 1 Outline of the Equipment 1-2
1.2 Features
This equipment has the following features.
Colour display unit with touch panel (JLN-740A/741A)
This unit has the function of displaying a ship speed and a trip distance by using a 5-inch colour display
as well as the user interface function for setting various parameters.
Autonomic measurement function by an ultrasonic transducer mounting
This function measures the fore/after speed of the ship by using ultrasonic signals.
Therefore, the function can measure the ship speed relative to the sea water without any impact from
the fair tide/tidal current near the bottom of the ship.
This function applies a dual beam system that sends ultrasonic signals in two directions, ahead and
astern, thereby dramatically reducing the ship speed measurement errors caused by the rolling of the
hull of the ship.
Digital/analog display switching function of a remote display (JLN-740A/740N)
Both analog display and digital display are supported for the remote display NWZ-640SDR/840SDR,
which is available as optional.
Output sentence version switching function (JLN-740A/740N)
This function outputs VBW (ship speed information) and VLW (trip distance) sentences. IEC61162-1 is
applied to the sentences as the standard. In addition, the function supports NMEA Ver.1.5, Ver.2.1,
Ver.2.3, and Ver.4.0.
JLN-740A/740N supports multiple versions in the same way as the IEC61162-450 sentences of
Ethernet output. The switching range is the same as that of serial output.
Remote Maintenance function (Remote Maintenance System, RMS) (JLN-740A/740N)
This function corresponds to the updating and equipment operation status checking of firmware by
RMS.
Maintainability and serviceability are improved by using the RMS function.
To use this function, connection with VDR of JRC is necessary.
Alert sequence function (JLN-740A/740N)
This function transmits and receives alert information with Bridge Alert Management System (BAM)
and Integrated Navigation System (INS).
This function corresponds to alert management by BAM/INS.
This function also supports Ethernet communication as well as contact and serial communication.
The alert sequence function (excluding contact) complies with IMO Resolution A.1021 of IEC 61162
and IEC 61924.