Overview

This document provides detailed technical specifications, features, and operational guidelines for Furuno's NXT series marine radar systems, including models DRS4D-NXT, DRS6A-NXT, DRS12A-NXT, and DRS25A-NXT. These radars utilize solid-state pulse compression Doppler technology for enhanced detection and safety at sea.

1. Radar Models and Output Power

• DRS4D-NXT and DRS6A-NXT: 25 W output power
• DRS12A-NXT: 100 W output power
• DRS25A-NXT: 200 W output power

2. Transmission Frequency and Channels

• Tx frequency ranges from approximately 9380 MHz to 9440 MHz depending on model
• Three selectable channels with auto/manual selection

3. Antenna Specifications

• DRS4D-NXT: Radome type antenna with 24" diameter, vertical beam width 25° (-3dB), horizontal beam width adjustable between 2.0° and 3.9° (-3dB), antenna rotation speed 24 rpm
• DRS6A/DRS12A/DRS25A-NXT: Slotted waveguide array antennas with vertical beam width 22°, horizontal beam width varies by antenna length:
  • XN10A (3.5 ft): 2.3°
  • XN12A (4 ft): 1.9°
  • XN13A (6 ft): 1.4°
  Rotation speed 24 rpm

4. Performance Parameters

• Minimum range: 10 m for DRS6A/12A/25A-NXT, 20 m for DRS4D-NXT
• Range resolution: 1% of range in use or 10 m, whichever is greater
• Range accuracy: ±1%
• Bearing accuracy: ±1°

5. Interface and Data Compatibility

• One LAN port (Ethernet 100Base-TX, RJ45)
• Supports IEC 61162-1/2 data sentences including GGA, GLL, GNS, HDG, HDM, HDT, RMA, RMC, THS, VHW, VTG

6. Power Supply

• DRS6A/DRS12A/DRS25A-NXT: 12/24 VDC, max current 9.5/5.0 A
• DRS4D-NXT: 12-24 VDC, max current 2.5-1.3 A

7. Environmental Specifications

• Operating temperature: -25 °C to +55 °C (storage -30 °C to +70 °C)
• Relative humidity: up to 95% (DRS6A/12A/25A-NXT), 93% (DRS4D-NXT) at +40 °C
• Degree of protection: IP56 (DRS6A/12A/25A-NXT), IP26 (DRS4D-NXT)
• Vibration standards compliant with IEC 60945 Ed.4

8. Physical Dimensions and Weight

• DRS4D-NXT radar sensor weight: 7.3 kg (16.1 lb)
• Open array antenna weights:
  • 3.5 ft (XN10A): 22 kg (48.5 lb)
  • 4 ft (XN12A): 25 kg (55.1 lb)
  • 6 ft (XN13A): 27 kg (59.5 lb)
• Dimensions vary by antenna type and model, with detailed measurements provided for installation

9. Software Compatibility

• DRS12A-/DRS25A-NXT: Compatible with NavNet TZT/TZT2 software version 6.0.1/6.21 or later
• DRS6A-NXT: Compatible with NavNet TZT/TZT2 version 5.0.1 or later
• DRS4D-NXT: Compatible with TZT version 4.2.1 and TZT2 version 3.0.1 or later

10. Advanced Radar Features

• Bird Mode: Automatically adjusts gain and sea clutter settings to detect birds gathering on the surface, enhancing situational awareness.
• RezBoost™ Technology: Proprietary beam sharpening technology that enhances radar image resolution and target detail, reducing clutter. Max setting provides highly detailed images.
• Target Analyzer™ Function: Utilizes Doppler technology to identify hazardous targets by color-coding echoes:
  • Red: Approaching hazardous targets
  • Green: Stationary or receding targets
  • Blue: Rain echoes when Rain Mode is active
  This improves safety by highlighting potential collision threats and detecting targets masked by rain clutter.
• Fast Target Tracking™ and Auto Target Acquire: Enables rapid vector display for selected targets and automatic acquisition of up to 100 targets within 3 NM that may pose hazards, triggering alarms based on TCPA (Time to Closest Point of Approach) settings.
• Solid-State Pulse Compression Doppler Radar: No magnetron required, resulting in no preheating time and lower energy consumption.

11. Installation and Accessories

• DRS4D-NXT radome type allows simple installation without opening the radome and does not require an external power supply unit.
• Available accessories include scanner units, radars sensors, radome mounts, LAN cables (2/5/10 m), joint boxes, and installation materials.

12. Compliance and Standards

• Meets IEC 60945 Ed.4 standards for marine radar equipment.

13. Manufacturer and Support

Furuno Electric Co., Ltd. and its global subsidiaries provide support and distribution. The document includes contact information for Furuno offices worldwide.

Summary

The Furuno NXT radar series offers advanced solid-state Doppler radar technology with enhanced target detection, tracking, and resolution capabilities. Key features such as Bird Mode, RezBoost™, Target Analyzer™, and Fast Target Tracking™ improve maritime safety and situational awareness. The series supports multiple power outputs and antenna configurations to suit various vessel sizes and operational needs, with robust environmental protection and compliance with international standards.