Why are range rings not displayed on my Furuno FAR-2328?
If range rings are not displayed on your Furuno Marine Radar, one possibility is to adjust the brilliance of range rings on the BRILL menu to see if intensity is increased. If this is unsuccessful, consider replacing the associated circuit board or the MAIN board.
What to do if Furuno FAR-2328 picture is not updated or freezes?
If the picture on your Furuno Marine Radar is not updating or is frozen, the issue might be a video freeze. Turn the power off and on again to restore normal operation.
What causes marks, indications, and noise but no echo on Furuno FAR-2328 Marine Radar?
If you are seeing marks, indications, and noise but no echo on your Furuno Marine Radar, the Tx high voltage protection circuit may have activated. Reset the power to restore normal operation.
How to display range rings on Furuno FAR-2328 Marine Radar?
If range rings are not displayed on your Furuno Marine Radar, it may be because they are turned off. Try turning on the range rings with [RANGE RING] in the [NAVTOOL] menu. If they still do not appear, their brilliance may be too low; adjust their brilliance in the [BRILL] menu.
Why is my Furuno Marine Radar properly tuned but has poor sensitivity?
If your Furuno Marine Radar is properly tuned but has poor sensitivity, possible causes include a deteriorated magnetron, a detuned MIC, dirt on the radiator face, water ingress to the waveguide or other feeder line, or the second trace echo rejection being active. Consider the following:1. Check magnetron current with the radar transmitting on 48 nm range. If the current is below normal, the magnetron may be defective and need replacement.2. Check the MIC detecting current. If it is below the normal value, the MIC may have become detuned and needs tuning.3. Clean the radiator surface.4. Remove water from the feeder line.5. Disable the second-trace echo rejector.
What to do if range changed but radar picture does not change on Furuno FAR-2328 Marine Radar?
If the range is changed but the radar picture does not change on your Furuno Marine Radar, it could be due to a defective range key or a video freeze-up. Try adjusting the range with the control unit or the [RANGE] box several times. If that does not work, try turning the power off and on again to see if the problem might be video freeze up. If still unsuccessful, the keypad may need replacement.
General| Antenna Type | Open Array |
|---|---|
| Power Supply | 24 V DC |
| Frequency | 9410 MHz ± 30 MHz |
| Range | 0.125 to 96 NM |
| Target Tracking | Up to 100 targets |
| Beamwidth | 1.9° (Horizontal) |
| Rotation Speed | 24 RPM |
General information and legal notices regarding the manual and equipment.
Instructions for proper disposal of the product and used batteries.
Definitions of safety alert levels (Danger, Warning, Caution).
Explains various safety action symbols used in the manual.
Warning to keep the antenna area clear of entanglement hazards.
Warning about water ingress into equipment causing shock or fire.
Warning about RF radiation hazard from the radar antenna aperture.
Emphasizes that no single navigational aid is foolproof; navigator must check all aids.
Explains TT tracking and the need for optimal radar tuning for accuracy.
Clarifies target indications and the need for clutter control adjustment.
Instructions regarding warning labels attached to the equipment.
Important notice regarding type-approved sensors and system interconnection.
System configuration diagram for X-band TR-UP with CF antenna.
System configuration diagram for X-band TR-UP with AF antenna.
System configuration diagram for S-band TR-UP units.
System configuration diagram for X-band TR-DOWN units.
System configuration diagram for S-band TR-DOWN units.
Categorization of units and notes on approvals and specifications.
Detailed description of controls on the RCU-014 unit.
Detailed description of controls on the RCU-015/RCU-016 units.
Procedure for powering the radar system on and off.
Instructions for adjusting screen and control panel brilliance.
Overview of the on-screen display areas and their components.
Description of the buttons and functions available on the InstantAccess bar.
Explanation of the radar display area and available function shortcuts.
Details on date/time, own ship info, information box, and TT/AIS settings.
Instructions on how to open, close, and navigate through the system menus.
Guide on accessing functions via on-screen menu box shortcuts.
Procedure for using the cursor menu to activate various functions.
Explanation of how cursor data is displayed and its different formats.
Instructions to change cursor bearing reference, range unit, size, and alignment.
Guide to assigning functions to the programmable function keys (F1-F4).
Instructions for customizing various operational settings to suit user needs.
Procedure for selecting the heading input source (gyrocompass, EPFS).
Instructions for setting own ship's speed via automatic input or manual entry.
Steps for manually entering own ship's speed when the speed log is not working.
Procedure for selecting the data source for own ship's position.
Instructions for adjusting the local time and switching between UTC and local formats.
Explains how to reset and save user settings for various radar functions.
Procedures for starting and stopping radar transmission and antenna rotation.
Guide on selecting tuning methods and initializing/manually tuning the receiver.
Explains how to select and change the pulselength for optimal range and resolution.
Instructions for adjusting the radar receiver gain for optimal sensitivity.
Guidance on reducing sea clutter using automatic or manual A/C SEA controls.
Detailed steps for fine-tuning sea clutter reduction using auto and manual modes.
Explains the effect of A/C SEA settings on clutter and target visibility.
Procedure to activate the BERTHING STC function for clear berthing views.
Guidance on reducing rain clutter using AUTO RAIN and A/C RAIN controls.
Instructions for selecting AUTO or MAN modes for rain clutter reduction.
Explains the effect of A/C RAIN control on receiver sensitivity and clutter.
Instructions on how to activate and use the interference rejector feature.
Guide on how to use the echo stretch feature to enlarge targets for better visibility.
Explanation of the echo averaging feature for reducing sea clutter and improving target discrimination.
Details on the ACE function for automatic sea and rain clutter reduction.
Steps to activate high sensitivity mode when ACE is enabled.
Procedure to suppress false echoes when ACE function is active.
Instructions for using the noise rejector to improve the on-screen S/N ratio.
Explanation of the wiper feature for reducing brilliance of weak signals and unwanted echoes.
Guide to assigning function keys to preset radar settings for different navigation needs.
Procedure to select a customized echo option from the screen.
Steps to edit customized echo settings, including video contrast.
Procedure to restore user customized echo settings from saved configurations.
Steps to restore customized echo options to factory default settings.
Guide to editing which customizations are available in the customize echo box.
Instructions to enable or disable second-trace echo rejection to prevent false echoes.
Description of the available orientation modes: Relative Motion and True Motion.
Instructions for selecting the radar range scale for optimal target viewing.
Explanation of methods for measuring target range using fixed rings, cursor, or VRM.
Detailed steps for measuring range using VRM keys and on-screen menu box operation.
Instructions to set the unit of measurement for VRMs.
Procedure to display Time To Go (TTG) for a selected VRM.
Explanation of using EBL keys and on-screen menu for measuring target bearing.
Details on how EBL readout indicates relative or true bearing based on presentation mode.
Explanation of using offset EBL for assessing collision risk between targets.
Guide to setting the origin point reference for offset EBL (ground, north, or heading).
Procedure for measuring range and bearing between multiple targets using EBLs and VRMs.
Instructions for off-centering the display to expand the view field without changing range scale.
Explanation of displaying target trails for synthetic afterglow and motion visualization.
Instructions for changing the trail time interval for plotting past positions.
How to display trail afterglow in single tone or gradual shading.
How to select the intensity of the trail afterglow.
How to use thinner trail lines for better target distinction.
Procedure to temporarily hide trails by setting trail time to OFF.
How to change trail stabilization mode between ground and sea stabilized.
Methods for erasing all trails or sections of trails.
How to prevent sea clutter display in true trails for clearer picture.
Procedure to show or hide own ship trails.
How to hide trails from land masses and non-moving objects for better visibility.
How to set trail length for up to 48 hours of trail data.
How to assign colors to trails based on length and gradation settings.
How to remove colors from a section of a multicolor trail, leaving it as gray.
How to shift the order of trail colors for multicolor trails.
Explanation of the Target Analyzer function for echo analysis and dangerous target identification.
Steps to activate or deactivate the Target Analyzer and Rain Echo Hatching functions.
How to set alarm zones to alert navigators to targets entering specific areas.
Procedure to silence the audible target alarm.
Steps to deactivate a target alarm.
How to adjust alarm triggers based on echo strength, conditions, and audio volume.
Explanation of PI lines for maintaining constant distance from coastlines or partner ships.
How to adjust PI line bearing and interval settings.
How to set PI line bearing reference to North (True) or own ship's heading (Relative).
How to select PI line orientation as parallel or perpendicular.
How to reset PI lines to default orientation (ship's heading or 0-degrees).
How to change the length of PI lines.
How to use the net cursor to depict fishing nets on the radar display.
Steps to set the dimensions and orientation of the net cursor.
Instructions for enabling and disabling zoom magnification to enlarge areas of interest.
General information on using marks on the radar display.
How to turn on/off and configure the own ship symbol.
How to set up barge markers with information like length and width.
Explains the antenna mark display when own ship symbol is scaled.
How to show or hide the latitude/longitude grid.
How to inscribe and erase drop marks for navigation and point marking.
Overview of preset brilliance and color schemes for on-screen data.
How to adjust color and brilliance for individual display items.
How to change the color palette to match ambient lighting conditions.
Steps to set up display of navigational data like depth, wind, and temperature.
Procedure to show or hide navigational data on the display.
How to set up the information box for target data, navigational data, and zoom areas.
Overview of the interswitch function for transferring signals between displays and antennas.
How to preset antenna and display combinations for radar system setup.
Explanation of the performance monitor for checking radar transmitter and receiver sensitivity.
How to check radar performance using the performance monitor arcs.
How to change the reference position for measurements and markers (ANT or CCRP).
How to set up and use the anchor watch feature to alert when the ship drifts.
Explanation of alert priorities, categories, and general alert information.
How to understand the alert messages, icons, and counters in the alert box.
Procedures for acknowledging alerts via keys or menu selections.
How to silence the audible alert buzzer using menu or function key.
How to display and navigate the list of violated alerts.
How to rotate the antenna without transmission to prevent freezing.
How to select display modes (Circle, Wide, All) for B/W-type radars.
Information on managing data stored on an SD card, including formatting and compatibility.
Steps for inserting SD cards into the processor unit.
Procedure for safely removing SD cards from the slot.
Steps for saving various data types to an SD card.
Steps for loading data from an SD card into the system.
How to delete data stored on an SD card.
Instructions for using the built-in screenshot feature, requiring an SD card.
How to enable/disable the watch alert for monitoring the radar picture at intervals.
Information on using dual radar display to overlay images from two radars.
Notes on how functions apply to both own and external radar echoes in dual display.
Notes on compatibility and alerts related to dual radar operations.
Lists restrictions applicable when using the dual radar function.
How to output echo and navigational data to a PC with wave analysis software.
How to activate and use the Doppler feature for clutter reduction.
General radar principles including minimum and maximum range.
Comparison of X-band and S-band radar performance, especially in precipitation.
Explanation of bearing and range resolution factors in radar.
Factors affecting bearing measurement accuracy.
Methods for measuring target range using fixed rings and VRM.
Explanation and examples of common false echoes like multiple echoes.
Explanation of sidelobe echoes and methods for their reduction.
Explanation of virtual images caused by mirror effects from large objects.
Explanation of shadow sectors caused by ship obstructions and their effect on detection.
Description of SART operation and its display on the radar screen.
How to activate the radar feature for optimal SART detection.
Notes on SART range errors and radar settings.
Explanation of RACON operation and its appearance on the radar display.
Explanation of RTE function for improving target detection.
Characteristics of solid-state radars regarding mixed range pictures and signal intensity.
Important warnings and cautions for using the target tracking system.
Identifies the primary keys used for target tracking operations.
Explanation of the TT symbols and how to show/hide them.
Steps to select the TT acquisition mode (manual, automatic, or combined).
Procedures for manually acquiring and tracking targets.
How targets are automatically acquired based on TT mode and acquisition zones.
Setting own ship's speed via automatic input or manual entry.
Recommended use and procedure for echo-referenced speed input.
Procedures for cancelling target tracking for individual or all targets.
Explanation of the TT lost target alert and how to set the lost target filter.
How to adjust the brilliance and color of TT symbols.
How to select different symbols for TT targets on B/W-type radars.
How to display or remove detailed target data in the data display area.
How to display, hide, and sort the target list based on various criteria.
How to assign preset names to TT targets for easier identification.
Procedure for assigning a name to a TT target, using presets or manual input.
Explanation of vector modes (relative and true) for displaying target movement.
How to select ground or sea stabilization for target vectors in True Motion mode.
How to change the vector mode and adjust the vector length for collision risk evaluation.
Explanation of the past position display showing equally time-spaced dots of target history.
How to enter set and drift corrections for accurate vector and target data.
How the radar calculates CPA and TCPA for AIS targets and sets collision alarms.
How to acknowledge TT collision alarms and silence the buzzer.
How acquisition zones alert targets and act as automatic acquisition areas.
Procedure for activating the first acquisition zone (AZ1).
How to set a polygon-shaped acquisition zone (AZ2).
How to put acquisition zones to sleep or deactivate them.
How to set the radar to acquire TT targets, or both AIS and TT targets.
How to reference the acquisition zone to heading or North.
How to set the shape and stabilization for the No. 2 acquisition zone.
Explanation of the trial maneuver feature to simulate ship movements against tracked targets.
Steps to set up and perform a trial maneuver, including speed and turn rate.
How to stop a trial maneuver at any time.
Lists and explains the TT system messages, their priority, and required actions.
How to use TT simulation mode for collision risk familiarization training.
Explanation of criteria for target acquisition and tracking, including quantization.
Factors affecting target tracking accuracy like sea returns, rain, and gain.
Table showing AIS object types, processing capacity, and alerts for buffer full conditions.
Table showing display capacity for AIS objects and alerts when capacity is reached.
Identifies the primary keys used for AIS mode operations.
Explanation of the AIS box indications and their remarks.
How to select AIS display modes (OFF, FILT, ALL) for viewing AIS symbols.
Explanation of AIS symbols and their meanings indicating object status.
How to filter out unnecessary AIS objects to reduce screen clutter.
How to convert sleeping AIS targets to activated targets for better movement visualization.
How to limit AIS auto-activation by distance, speed, class, or length.
How to "sleep" activated AIS targets to focus on important ones.
How to input voyage data like navigational status, ETA, and destination.
How to display abbreviated AIS data (Vessel name, COG, SOG, CPA, etc.) for a selected object.
How to display basic AIS data for a selected object using the cursor menu.
How to display additional information about an AIS object.
How to remove AIS data from the display area by cancelling the target.
How to adjust the brilliance of AIS symbols.
How to change the color of AIS symbols.
How to change the color of AtoN symbols.
How to change the size of AIS symbols (standard or scaled).
Explanation of the past position display for activated AIS targets.
How past position orientation (true or relative) is controlled.
How to set stabilization mode (ground or sea) for true motion past position display.
Explanation of AIS lost alerts and how to set the AIS lost filter.
How to enable or disable the AIS lost alert using the [LOST TARGET] box.
How the radar calculates CPA and TCPA for AIS targets and sets collision alarms.
How to associate TT and AIS targets to present a single symbol for the same physical target.
How to view own ship's static data, such as type, call sign, and location.
How to create and save AIS messages.
Procedures for transmitting saved or created AIS messages.
How to access and view the received AIS messages list.
How to filter the AIS message list using upper and lower filter settings.
How to set up notifications for received AIS messages.
How to show symbols for unread or viewed AIS messages.
How to mark unread AIS messages as read based on criteria.
How to delete AIS messages based on specific criteria.
Lists AIS system messages, their priority, and meanings.
Description of the six available orientation modes for the radar display.
How to select different types of markers to inscribe on the radar map.
Explanation of radar maps, their data capacity, and referencing.
How to show or hide radar map marks using the menu or InstantAccess bar.
How to select mark colors for B/W-type radars.
Procedures for inscribing marks at cursor or own ship positions.
Methods for deleting marks individually or all at once.
How to correct positional errors between radar screen and radar map.
How to mark prominent targets or points of interest using origin marks.
How to set origin mark stabilization (ground or sea).
How to delete origin marks individually.
How to adjust the own ship mark shape for realistic depiction.
How to display marks received from an ECDIS, including predicted positions.
Information on storing own ship and target tracks, and managing memory.
How to set the plotting interval and maximum track recording time.
How to set track colors for own ship and target tracks.
How to automatically plot target tracks for specific TT target numbers.
Methods for deleting tracks by percentage, color, or cursor selection.
How to use waypoints for starting points, destinations, or intermediate voyage points.
Procedures for entering waypoints using the cursor or from the menu.
Methods for erasing individual waypoints or all waypoints.
How to display the list of saved waypoints.
How to show or hide waypoint names and numbers on the display.
How to display and set/edit internal or received routes.
Procedures for displaying internal or received routes.
How to skip the next waypoint on a route to save time.
How to set a width for routes and handle deviation alerts.
How to show or hide the turning line indicating when the vessel starts a turn.
How to delete specified or all internal routes.
How to view the list of routes saved in internal memory.
How to set waypoint arrival alerts and areas for proximity notification.
Overview of chart functions available for A/B/W-types with Radar Plotter.
How to align the chart position when radar targets and chart are not overlaid correctly.
How to select chart types (Vector, Fishing, C-MAP, Navionics).
Explanation of items within the chart settings menu.
How to turn navigational aid data on or off individually.
How to highlight the outer edge of land masses on the display.
How to check chart and symbol versions via the chart administration menu.
Schedule of regular maintenance checks and measures for optimal performance.
Instructions for replacing fuses in AC and DC powered configurations.
Estimated life expectancy for major consumable parts like magnetron and motor.
Procedure for cleaning the trackball if the cursor moves abnormally.
Common problems and their solutions for restoring normal operation.
Procedures for hardware and software troubleshooting by qualified personnel.
How to execute a diagnostic test to check circuit boards and system components.
How the system automatically uses secondary sensors if the primary fails.
Details on antenna type, beam width, and sidelobe attenuation.
Information on TX frequency, modulation, output power, and range scales.
Specifications for minimum range, range discrimination, accuracy, and bearing.
Specifications for monitor screen types, brightness, visible distance, and effective diameter.
Details on processor unit ports, LAN, and data sentences.
Operating and storage conditions for ambient temperature and humidity.
Color codes for various units like antenna and processor units.
Specifications for performance monitor parameters like frequency range and power.
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