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The Onwa KR-1238 Marine Radar - 12", 36nm is a high-performance radar system designed specifically for marine applications. With its 12-inch display and impressive 36-nautical mile range, this radar provides reliable and accurate information to enhance navigational safety.
The radar system features an adjustable data field, allowing users to customize the displayed information according to their preferences and specific requirements. This flexibility ensures that essential data is easily accessible and tailored to individual needs. Thanks to its USB connectivity, the system software of the radar can be conveniently upgraded. This ensures that users can benefit from the latest features and advancements by simply connecting a USB device, keeping the radar system up to date and future-proofed.
The radar also includes an AIS (Automatic Identification System) display function, enabling users to monitor and track AIS-equipped vessels in the vicinity. This feature enhances situational awareness and aids in collision avoidance, making it an invaluable tool for safe navigation. Users have the option to choose from multiple colors for target and background display, allowing for easy differentiation and improved visibility. This customizable feature enhances readability and clarity, particularly in challenging weather or lighting conditions.
Built with durability in mind, the radar system boasts a rugged die-cast and waterproof housing. This robust construction ensures reliable performance even in harsh marine environments, providing peace of mind during demanding operations. The radar system offers user-programmable function keys, allowing for quick access to frequently used functions or settings. This intuitive customization enables streamlined operation and efficiency, saving valuable time during critical situations.
To optimize the radar picture and enhance clarity, the system automatically adjusts the display based on environmental conditions and settings. This automatic optimization ensures that radar targets are clearly visible and easily distinguishable, enhancing overall performance and usability. The radar system features newly enhanced performance, delivering improved accuracy, sensitivity, and target detection capabilities. These enhancements provide users with a higher level of confidence and reliability in radar observations.
The radar supports multiple representation modes, including head-up, course-up, and north-up. Users can select the most suitable mode based on their preference or specific navigation requirements, ensuring a comfortable and intuitive viewing experience. Additional features include an economy mode to optimize power consumption, a guard zone alarm to alert users of potential hazards, and a watch mode for continuous monitoring. These functions contribute to enhanced safety and efficiency during marine operations.
The Onwa KR-1238 Marine Radar is a feature-rich radar system that combines advanced functionality, durability, and ease of use. With its adjustable data field, upgradable software, AIS display function, customizable color options, rugged construction, user-programmable keys, automatic optimization, enhanced performance, and various representation modes, this radar system provides comprehensive radar capabilities to enhance navigational safety and efficiency at sea.
Antenna Radiator | |
Radiator | Slotted waveguide Array |
Radiator Length | 55 cm |
Antenna Rotation Speed | 24 RPM (2) |
Wind Resistance | |
Relative Wind Speed | 100 knots(51.5 m/s) |
Beam Width | |
Horizontal | 4 |
Vertical | 25 |
Sidelobe | |
Within | 20 off mainlobe less than -18 dB |
Outside | 20 off mainlobe less than -23 dB |
Polarization | Horizontal |
Transceiver Module (contained in Radome) | |
Transmitting Tube | MSF1421B or MAF1421B |
Frequency | 9410 30MHz (X-band) |
Warm Up time | 1:30 minutes |
Peak Output Power | 4 kW nominal |
Modulator | FET Switching Method |
IF | 60MHz |
Tuning | Automatic or Manual |
Receiver front end | MIC (Microwave IC) |
Bandwidth | |
Tx pulselength 0.3 S and 0.08S | 25 MHz |
Tx pulselength 0.8S | 3 MHz |
Noise Figure | 10 dB nominal |
Duplexer | Circulator with Diode Limiter |
Environment | |
Temperature | |
Display unit | -15 to +55C |
Antenna unit | -25 to +70C |
Humidity | Relative humidity 93% or less at 40C |
Power Supply | 10.5 VDC to 40.0 VDC, 60W (30W in economy mode) |
Display Unit | |
Type | 12.1-inch LED backlight, 32-bit TFT Color LCD Display |
Display Modes | Head-up, Course-up, North-up, True Motion |
Range Scale | |
Range | 0.125, 0.25, 0.5,0.75, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 36 |
Range Interval | 0.0625,0.125,0.125,0.25,0.25,0.25,0.5,0.5,1,1,2,2,4,4,6 |
Number of Rings | 2,2,4,3,4,6,4,6,4,6,4,6,4,6,6 |
Bearing Resolution | 4 |
Bearing Accuracy | Within 1 |
Range Discrimination | Better than 30 m |
Range Ring Accuracy | 0.9% or range in use or 8 m whichever is larger |
Minimum Range | Better than 25 m |
Target Tracking Function | |
Acquisition | 40 |
Tracking | Auto |
Display | Speed, Course, Range/Bearing and CPA/TCPA |
Vibration | |
Vibration Total Amplitude | 1 to 12.5 Hz 1.6 mm, 12.5 to 25 Hz 0.38 mm, 25 to 30 Hz 0.1 mm |
Echo Trail | |
Interval | 15s, 30s, 1min, 3mins, 6mins, 15mins, 30mins or continuous |
AIS Display | |
Acquisition | AIS Vessels or ATON |
Tracking | Auto |
Display | Vessel Name, MMSI, Call sign, Range/Bearing, L/L |
Speed/Course | ROT, CPA/TCPA |
Free Shipping | No |
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