3D Dynamic Sensor GPS Compass/GPS Navigator JLR-31/JLR-21
Heave compensation
The JLR-31/JLR-21 has heave functionality built-in as standard. In rough ocean conditions (with high waves), the GPS compass can correct up and down (attitude), movement. This is especially useful for fish finders and sonars on fishing vessels where high waves are compensated for with 20cm rms accuracy, providing better potential for a profitable catch.
High speed update
The JLR-31/JLR-21 supports Speed Over Ground (SOG) and Course Over Ground (COG). The position, SOG and COG are updated every 200 milliseconds (which is 5 times faster than previous model JLR-30/JLR-20), delivering high accuracy.
| IMO performance standard | Gross Tonnage |
|---|---|
| Transmitting Heading Device (THD) | From 300GT to less than 500GT |
| Satellite Navigator (GPS) | 20GT or more |
| GPS compass | Gyro compass | Magnetic compass | |
|---|---|---|---|
| Periodic maintenance | No | Yes | Yes |
| Setting time | typically 30 seconds | about 4 hours | no |
| Tracking response | High speed | Middle speed | Low speed |
| Accuracy | Good | Good | Bad |
| Magnetis influence | No | No | Yes |
| Correction | No | Yes for latitude | Yes for variation, deviation |
Simple operation
The compact design of the JLR-31/JLR-21 incorporates an intuitive interface, providing enhanced ergonomics and user friendliness. The logic of the controls and excellent on-screen menus will greatly shorten most users’ learning period.
Measuring tool
The GPS compass allows calculation of distance and bearing between any two points, supporting Rhumb Lines (RL) for the short legs and Great Circle (GC) for long distance legs. Also, a trip log function comes standard for distance and heading.
CCRP and Anchor watch
The JLR-31/JLR-21 has CCRP1 function incorporated, allowing the transfer of CCRP sentences to other onboard equipment and anchor watch alerts the watch officer of possible anchor dragging situations.
1. Consistent Common Reference Point
Trend graph
The new trend graph display mode shows a history of roll, pitch and heave and SOG as an easy-to-read graphical view. Selections can be made to show maximum or average results.
Antenna design
The processor is built into the antenna. Eliminating alignment between antenna and processor found in separate systems, therefore contributing to an easy setup with less error and significantly reduced installation time. This concept also reduces the installation costs as only a single cable is used between antenna and display unit.
The outer shell of JRC’s new antenna system has a smooth surface. This slippery exterior makes it almost impossible for birds to perch on the domes or for the antennas to be completely covered in snow.
Should something interfere with the coverage, JRC’s proven antenna design incorporates a layer of air that reduces possible blind spots, allowing for a more precise heading than conventional systems.
High speed tracking
The GPS compass has its origins as a direction sensing system, but the JLR-31/JLR-21 goes far beyond that. The JLR-31/JLR-21 provides an impressive heading accuracy of 0.25° rms (JLR-31)/0.50° rms (JLR-21). Heave accuracy is 20cm rms and roll and pitch for both models is 0.5° rms. The tracking Rate of Turn (ROT) is 45° per second.
| Name | GPS Compass/GPS Navigator | ||
|---|---|---|---|
| Model | JLR-21 | JLR-31 | |
| IMO approved (THD) | ✓ | ||
| IMO approved (GPS) | ✓ | ||
| Sensor | |||
| Model | NNN-21 | NNN-31 | |
| Receiver Type | Multi channel all-in-view (12ch + 1ch SBAS) | ||
| Frequency | 1575.42MHz ± 1MHz(C/A code) | ||
| Direction accuracy | 0.5° rms | 0.25° rms | |
| Rolling accuracy | 0.5° rms | ||
| Pitching accuracy | 0.5° rms | ||
| Heaving accuracy | 20cm rms | ||
| Display resolution | 0.1° | ||
| Resolution output | 0.1° or 0.01° (selectable) | ||
| Tracking Rate of Turn | 45° / sec | ||
| Tracking acceleration | 1G | ||
| Start-up time | less than 2 minutes (warm start fix, typically 30 seconds) | ||
| DGPS input | RTCM SC-104 Ver.2.0 Type 1, 2, 9, 16 | ||
| SBAS receiver | Built-in(MSAS/WAAS/EGNOS) | ||
| RAIM function | Built-in | ||
| Position accuracy | GPS : 12m 2drms (C/A code, HDOP≦4, SA OFF) SBAS : 6m 2drms when SBAS corrected DGPS : 4m 2drms when DGPS corrected (when connected to beacon receiver) | GPS : 12m 2drms (C/A code, HDOP≦4, SA OFF) SBAS : 5m 2drms when SBAS corrected DGPS : 3m 2drms when DGPS corrected (when connected to beacon receiver) | |
| Protection | IPX6 | ||
| Ambient conditions | -25 to +55°C (operational) -25 to +70°C (storage) | ||
| Display | |||
| Model | NWZ-4701 | ||
| Display | 5.7-inch LCD, 320 by 240 pixels | ||
| Display modes | Compass rose, bow heading, navigation, rate of turn (ROT), water/ground speed, trend graph, calculation, GPS status | ||
| Direction & nav. data output1 | IEC61162/NSK(shared) 5 ports (AD-10 output availuable: 2 of 5 ports) IEC61162 output: HDT, THS ROT, ZDA, GGA, VTG, RMC, GBS, DTM, GSA, GSV, GNS, MSS, GST, GLL, ALR, ATT, HVE | ||
| Current data input | 1 port(CUR, VBW) | ||
| Alarm contact signal | 2 ports (alarm output) 1 port (ACK input) | ||
| LOG pulse | 1 port (off , 200p/NM, 400p/NM) | ||
| Protection | IPX4 | ||
| Ambient conditions | -15 to +55°C (operational) -25 to +70°C (strage) | ||
| Power | 12 to 24V DC (-10% to +30%) | ||
| Power consumption | 12W (including sensor), 6W (excluding sensor) | ||
| Vibration/EMC | IEC60945 ed4 | ||
| Options | |||
| Rectifier | NBG-320 | ||
| Data cable (for serial data) | CFQ-5374 (3m), CFQ-5374-15 (15m) | ||
| Data cable (for contact signal) | CFQ-5404 (3m), CFQ-5404-15 (15m) | ||
| Extention cable (sensor-display) | CFQ-7249 (20m), CFQ-7249-10 (10m) | ||
| Junction box | NQE-7720 | ||
| Data cable (for sub display) | CFQ-7251 (1.5m Y-cable) | ||
| Data cable (for JRC Radar)2 | CFQ-5469 (10m) | ||
| Data cable (for beacon receiver) | CFQ-7250 | ||
| Mount base (for NNN-21) | MPBX44117 | ||
1.Selectable sentences depend on versions (NMEA 1.5, 2.1, 2.3) Some combinations of output sentence, bit rate, and output intervals may not be possible
ATT and HVE sentence can be set from output cycles of 25ms, 50ms,100ms, 200ms, 1s, 2s only
2.Accepted for JMA-3300/5100/5200/5200MK2/5300/5300MK2 series
Antenna (JLR-31)
