Radar System – KR1238


Suppiler: ONWA
Key Features

This system is available in two options, both supplied with a 12inch Colour LCD Marine Radar. Complete with AIS Display and target tracking.


  • Antenna Type  55cm Hybrid array
  • RF Transceiver Peak Output Power
  • Adjustable Data Field, more flexible
  • The system software can be upgraded via USB
  • AIS display function
  • Multi colour selection for target and background
  • Rugged die-cast, waterproof housing.
  • Target Tracking function, can track and trace up to 20 targets.
  • User-programmable function keys
  • Automatic optimization of radar picture
  • Newly enhanced performance
  • Head-up, Course-up and North-up representation mode.
  • Economy Mode, Guard Zone Alarm and Watch Mode
  • Also available is the next model KR1268 with all the above features plus Antenna type 120cm Hybrid Array and RF Transceiver Peak Output Power – 6kw nominal – Call for Prices
  • For Trade Enquiries – CLICK HERE


Download Brouchure
SKU: KR-1238


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°
Within ± 20° off mainlobe; less than -18 dB
Outside ± 20° off mainlobe; less than -23 dB


Transceiver Module (contained in Radome) 

Transmitting Tube
MSF1421B or MAF1421B
9410 ± 30MHz (X-band)
Pulse Length PPR
0.08 µ s/2100 Hz(0.125, 0.25, 0.5, 0.75, 1.5 nm)
0.3µ s/1200 Hz(1.5, 2, 3 nm)
0.8 µ s/600 Hz(3, 4, 6, 8, 12, 16, 24, 36 nm)
Warm Up time
1:30 minutes
Peak Output Power
4 kW nominal
FET Switching Method
Automatic or Manual
Receiver front end
MIC (Microwave IC)
Tx pulselength 0.3 µS and 0.08µS: 25 MHz
Tx pulselength 0.8µS: 3 MHz
Noise Figure
10 dB nominal
Circulator with Diode Limiter



Display unit: -15 to +55°C
Antenna unit: -25 to +70°C
Relative humidity 93% or less at 40°C


Power Supply 

10.5 VDC to 40.0 VDC, 60W (30W in economy mode)


Display Unit 

12.1-inch LED backlight, 32-bit TFT Color LCD Display
Display Modes
Head-up, Course-up*, North-up*, True Motion**
* Heading input required
** Heading and speed inputs required
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
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 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
any talker (menu selection) input
AIS Display
Acquisition: AIS Vessels or ATON
Tracking : Auto
Display : Vessel Name, MMSI, Call sign, Range/Bearing, L/L
Speed/Course, ROT, CPA/TCPA
(AIS data input required)


Equipment List 

Display unit: 1 unit
Radome Antenna unit: 1 unit
ANTENNA CABLE: 10/15/20/30m (Specify when ordering)
Operation Manual
Standard Spare Parts and installation materials : 1 set