The Onwa KR-1568 is a high-performance marine radar system built for commercial vessels, fishing boats, and leisure crafts. Its advanced features and robust design make navigation safer and more efficient—day or night, rain or shine.

Bright and Clear 15-Inch Display

This radar features a 15-inch color LCD screen with LED backlighting and 32-bit TFT technology. It delivers crystal-clear visuals, ensuring optimal performance even in poor visibility. Whether you’re navigating in fog, darkness, or heavy rain, this display keeps your surroundings in view.

Advanced Target Tracking and AIS

Thanks to ARPA (Automatic Radar Plotting Aid), the system can automatically track up to 20 moving targets, improving your situational awareness. In addition, AIS integration allows you to identify vessels in real time by displaying information such as vessel name, MMSI, speed, and direction. These features help you avoid collisions and make smarter decisions at sea.

Flexible Range and Viewing Modes

The KR-1568 supports a wide range scale from 0.125 to 72 nautical miles, with customizable range intervals and up to 6 range rings. You can choose from multiple display modes—Head-up, Course-up, and North-up—for the view that suits you best.

Powerful Performance in Any Condition

This radar system operates at a peak output power of 6 kW, delivering strong and stable pulses. Its 1.2-meter slotted waveguide array antenna rotates at 24 RPM and is built to resist wind speeds up to 100 knots (51.5 m/s). Plus, the horizontal beam width of 1.9° ensures precise target detection.

Built for Tough Marine Environments

The display unit operates in temperatures between -10°C to +50°C, while the antenna functions smoothly from -25°C to +70°C. It handles 93% humidity at 40°C and is housed in a rugged, waterproof die-cast body.

Smart Features That Make Navigation Easy

Echo Trails: View past target movements over time (15 sec to 30 mins or continuous)
Target Tracking: Manual acquisition of 30 targets, automatic tracking, and real-time data display
Interface Support: Compatible with multiple NMEA 0183 talkers for smooth system integration
Custom Settings: Personalize function keys and data fields to match your workflow

Technical Specifications:

Antenna Radiator

Component	Specification
Radiator	Slotted waveguide array
Radiator Length	120 cm
Antenna Rotation	24 RPM
Wind Resistance	100 knots (51.5 m/s) relative wind speed
Beam Width	Horizontal: 1.9°, Vertical: 22°
Sidelobe Suppression	±20° off mainlobe: < -24 dB, >±20°: < -30 dB
Polarization	Horizontal

Transceiver Module (In Antenna)

Component	Specification
Transmitting Tube	MAF1422 or MSF1422
Frequency	9410 ± 30 MHz (X-band)
Pulse Length & PPR	Various (see below for range-specific details)
Warm-Up Time	1:30 minutes
Peak Output Power	6 kW nominal
Modulator	FET Switching Method
IF Frequency	60 MHz
Tuning	Automatic or Manual
Receiver Front End	MIC (Microwave IC)
Bandwidth	25 MHz (0.3 & 0.08 µs), 3 MHz (0.8 µs)
Duplexer	Circulator with Diode Limiter

Display Unit

Component	Specification
Type	15-inch LED-backlit 32-bit TFT Color LCD
Display Modes	Head-up, Course-up, North-up, True Motion**
Range Scale	0.125 to 72 nm (17 scales)
Range Intervals	From 0.0625 to 16 nm
Number of Rings	2 to 6 rings depending on range
Bearing Resolution	4°
Bearing Accuracy	Within 1°
Range Discrimination	Better than 30 m
Range Ring Accuracy	0.9% of range or 8 m (whichever is larger)
Minimum Range	Better than 25 m
Echo Trail	15s, 30s, 1m, 3m, 6m, 15m, 30m, or Continuous
Vibration Tolerance	1–12.5 Hz: ±1.6 mm; 12.5–25 Hz: ±0.38 mm; 25–30 Hz: ±0.1 mm

Environmental

Component	Specification
Operating Temp.	Display: -10°C to +50°C; Antenna: -25°C to +70°C
Humidity	≤ 93% RH at 40°C
Power Supply	12V/24V/32V DC (10.5V–40V); 60W (30W in Eco mode)

Tracking & AIS Features

Feature	Specification
Target Tracking	30 manual acquisitions, Auto tracking
Displayed Data	Speed, Course, Range/Bearing, CPA/TCPA
AIS Display	Name, MMSI, Call sign, Range/Bearing, L/L, Speed/Course, ROT, CPA/TCPA (requires AIS input)

Interface & Compatibility

Component	Specification
NMEA Inputs	$APB, $BWC, $BWR, $DBK, $DBS, $DBT, $DPT, $GGA, $GLC, $GLL, $GTD, $HDG, $HDW, $HDT, $MDA, $MTW, $RMA, $RMB, $RMC, $VTG, $VHW, $XTE

Equipment list:

Item	Description
Display Unit	1 unit
Open-Array Antenna	1.2 m scanner
Antenna Cable	10/15/20/30 m (choose when ordering)
Power Cable	3 m
Operation Manual	Included
Spare Parts & Installation	1 set (standard materials included)

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ONWA KR-1568 15” Marine RADAR – 64NM Range