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ONWA KR-1238 4KW 32 Nautical Miles Marine Radar Radome radar Antenna Marine Navigation radar
Feature highlights:The ONWA KR-1238 Marine Radar offers a 32 nautical mile range, 4kW peak output power, and advanced target tracking for up to 40 vessels. It features a compact radome design with slotted waveguide array technology, ensuring precise navigation in harsh marine conditions. With a 12.1-inch LED display, multiple range scales, and AIS data integration, it enhances situational awareness. Supports wide voltage input (10.5-40.0 VDC) and operates in extreme temperatures (-25°C to +70°C)
Specifications
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°
Vertical 25°
Sidelobe
Within ± 20° off mainlobe; less than -18 dB
Outside ± 20° off mainlobe; less than -23 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)
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)
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
Modulator
FET Switching Method
IF
60MHz
Tuning
Automatic or Manual
Receiver front end
MIC (Microwave IC)
Bandwidth
Tx pulselength 0.3 µS and 0.08µS: 25 MHz
Tx pulselength 0.8µS: 3 MHz
Tx pulselength 0.8µS: 3 MHz
Noise Figure
10 dB nominal
Duplexer
Circulator with Diode Limiter
Environment
Temperature
Display unit: -15 to +55°C
Antenna unit: -25 to +70°C
Antenna unit: -25 to +70°C
Humidity
Relative humidity 93% or less at 40°C
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**
* Heading input required
** Heading and speed inputs required
* 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
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
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
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
Interface
any talker (menu selection) input
$–APB,$–BWC,$–BWR,$–DBK,$–DBS,$–DBT,$–DPT,
$–GGA,$–GLC,$–GLL,$–GTD,$–HDG,$–HDW,$–HDT,
$–MDA,$–MTW,$–RMA,$–RMB,$–RMC,$–VTG,$–VHW,$–XTE
$–APB,$–BWC,$–BWR,$–DBK,$–DBS,$–DBT,$–DPT,
$–GGA,$–GLC,$–GLL,$–GTD,$–HDG,$–HDW,$–HDT,
$–MDA,$–MTW,$–RMA,$–RMB,$–RMC,$–VTG,$–VHW,$–XTE
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)
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)
POWER CABLE: 3m
Operation Manual
Standard Spare Parts and installation materials : 1 set
Radome Antenna unit: 1 unit
ANTENNA CABLE: 10/15/20/30m (Specify when ordering)
POWER CABLE: 3m
Operation Manual
Standard Spare Parts and installation materials : 1 set
Previous : ONWA KRA-1007N/KRA-1007W Antenna for Marine Navigation 4KW Nautical Miles Radar Radome Marine Supplies
Next : KR-1968-H 19" 64NM Color LCD Marine Radar with AIS Display/ Target Tracking (ARPA) , Support Network
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Sales@Matsutec.cn（Order products please E-mail）Sales Contact : Jack Lin
Product Support Email： Support@Matsutec.cn
Address：NO.95-96 YanNan Road, Futian District, Shenzhen, China
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