PRE OWNED JRC JLN-550 JRC JLN-550 MARINE SONAR SPEED LOG

The JRC JLN-550 is a high-precision Doppler Sonar System designed to provide accurate ship’s speed over ground (SOG) and speed through water (STW). In the Bhavnagar and Alang markets, this system is a high-demand item for large tankers, bulk carriers, and LNG vessels that require precise docking speed and reliable speed data for safe navigation.

JRC JLN-550 DOPPLER SONAR SPEED LOG

PRODUCT OVERVIEW

The JRC JLN-550 utilizes advanced Doppler signal processing to measure speed with extreme accuracy. Unlike standard speed logs, the JLN-550 can provide dual-axis speed (longitudinal and transverse) when in SOG mode, which is essential for berthing and maneuvering large vessels in confined waters. The system features a bright 8.4-inch color TFT LCD that clearly displays speed in large digital numerals along with graphical trend indicators.

The JLN-550 is designed for durability and ease of maintenance. Its transducer is designed to be highly resistant to aeration and hull noise, ensuring a stable speed reading even in heavy sea states. The system integrates seamlessly with other bridge electronics such as AIS, Radar, and ECDIS, providing them with the high-precision speed data required for accurate collision avoidance and route monitoring.

TECHNICAL SPECIFICATIONS

-- Model: JLN-550

-- Manufacturer: JRC (Japan Radio Co., Ltd.)

-- Display: 8.4-inch Color TFT LCD (NWZ-162)

-- Speed Range: -10.0 to +40.0 knots

-- Speed Accuracy: 1.0% or 0.1 knots (whichever is greater)

-- Operating Depth: 2.0m to 200m (SOG mode) / Over 2.0m (STW mode)

-- Operating Frequency: 240 kHz

-- Interfaces: 8x NMEA 0183 Outputs (VBW, VHW, VTG), 2x NMEA Inputs, 1x Log Pulse Output

-- Supply Voltage: 100-115V / 200-230V AC or 24V DC

-- Operating Temperature: -15°C to +55°C (Display)

-- Compliance: IMO Res. A.824(19), MSC.96(72), Wheelmark Certified

KEY FEATURES & APPLICATIONS

-- Dual-Axis Speed Measurement: Provides both fore-aft and port-starboard speed data, giving pilots and captains critical information during complex docking maneuvers.

-- Precise Docking Mode: Features a dedicated display mode for berthing, showing the vessel's movement relative to the dock with high resolution (0.01 knot increments).

-- Stable Doppler Technology: The 240 kHz ultrasonic frequency minimizes the impact of air bubbles and water turbulence, ensuring consistent speed data in various hull conditions.

-- Large Color Display: The NWZ-162 display unit offers multiple viewing modes, including digital, analog, and graphic history, ensuring the data is readable in all bridge lighting.

-- Comprehensive Data Output: Distributes speed data to multiple bridge systems simultaneously via high-speed NMEA 0183 ports, ensuring all navigation sensors are synchronized.

-- Self-Diagnostic Function: Built-in test equipment (BITE) continuously monitors the system health and alerts the crew to any transducer or processor irregularities.

TYPICAL CONDITION (USED/REFURBISHED)

Our refurbished JLN-550 units from the Alang yards are subject to rigorous testing. We focus on the transducer insulation and signal strength to ensure accurate acoustic performance. The NWZ-162 LCD is checked for backlight life and screen clarity. We also verify the Distributor Unit for clean NMEA output and stable log pulse signals. Every unit is factory-reset and provided with a technical test report from our Bhavnagar facility to ensure it is ready for immediate vessel installation.

COMPATIBLE BRAND MODELS:

JRC JLN-550, JRC JLN-205, JRC JLN-740, Furuno DS-60, Furuno DS-80, Furuno DS-50, Sperry Marine NAVIKNOT 600S, Sperry Marine NAVIKNOT 350E, Yokogawa EML-500, Raytheon Anschütz Standard 22.

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