JRC JLN-740 Series Doppler Speed Log

Features:

The JLN-740 series is a Doppler Speed Log compliant with the IMO MSC.96(72) standard, required on all internationally-voyaging ships exceeding 300 GT. Boasting never-before-seen accuracy for speed measurement, the JLN-740 is also installed with our company's proprietary bubble detection, which informs you when measurement accuracy is impaired due to air bubble contact. A model featuring color LCD touch panels for the main and sub displays, allowing you to view important information and adjust brightness in all displays from one location, is also available.

Precise Ship Speed Tracking

The JLN-740 series utilizes digital signal processing, which, coupled with optimizations to existing speed measurement waveforms and the reliability of ship bottom mounting, has resulted in water speed measurement with accuracy up to 0.03kn or 0.3% in all models*1. That accuracy of information allows for highly fuel-efficient speeds, which means faster voyages with less waste. Along with improved speed measurements, the series also has greatly improved ship speed tracking, relaying all the information you need for precise navigation during berthing. 

*1 At fixed speeds (measured value).

Bubble Detection

A long-unsolvable problem with doppler-based water speed measuring systems was reduced accuracy from bubbles making contact with the measuring device on the bottom of the vessel. The JLN-740 series detects when bubbles contact the transducer, and - using proprietary technology from JRC - alerts you of reduced measuring accuracy via the display. Confirming the source of the issue typically requires visually examining the device on the bottom of the ship. However, onboard air bubble detection allows you to skip unnecessary preventive maintenance.

Performance Standard Compliant

The JLN-740 series is compliant with the IMO MSC.96(72), A.824 (19), and A.694(17) standards, required on all internationally-voyaging vessels exceeding 300 GT, and meets standards for the following IEC environmental test standards 

·MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS                                       IEC 60945(2002)

·Marine speed and distance measuring equipment(SDME) IEC 61023(2007)

·Presentation of navigation-related information on shipborne navigational displays                                             IEC 62288(2014)

·Digital interfaces - Single talker and multiple listeners   IEC61162-1(2010)

·Digital interfaces - Ethernet interconnection        IEC61162-450(2011)*2

In addition, when used with JRC’s Satellite Log JLN-720, ships exceeding 50,000 GT can meet the requirements for IMO MSC.334(90). 

*2 Only supports JLN-740A/N

Please send email to us for more details:

sales@malinsmarine.com

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 About us

Malins Marine Service Co.,Ltd.

Was established in 2010 as a wholesaler and service provider of marine navigation & communication equipment.During the past years, the company has expanded by several folds in terms of size as well as business turnover. 

The company started up in 2010 with one office and two persons and now has three offices and one warehouse, with working team of over 20 persons.As China continues to develop, Malins Marine is in a strong position not only to utilize the resources available domestically but also to introduce foreign shipyards and marine prodcuts to the ship owners and ship managers of China. Malins Marine collaborates closely with worldwide leading and specialized maritime equipment suppliers and manufacturers in order to provide our wide range of clients a full breadth of products and genuine spare parts as well.

With the support of a global network of well-known manufacturers, we are able to meet the growing & challenging demands of our customers from a sustainable development perspective.One-stop service for spare parts supplied and service, provide economic solution for ship owners & managers. To fully meet our customers’ requirements, we also specialise in navigation and communication systems, statutory annual radio surveys, annual performance tests as well as after-sales services. Our comprehensive line includes high quality electronics for navigation, communications, and safety & security applications. Over the years, we have built our service net covered China Coastal Port from north to south. Most of attending engineer trained by major makers and we owned genuine spare parts of kinds of makers in Shanghai head office.

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Sales navigation & communication equipment & spare parts

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