Furuno FR-8251 Setting a Guard Alarm Zone, Selecting guard zone type, Activating the guard zones

Page 38

1.28Setting a Guard Alarm Zone

The guard allows the operator to set the desired range and bearing for a guard zone. When ships, islands, landmasses, etc. violate the guard zone an aural alarm sounds and the offending target blinks to call the operator’s attention. Two areas can be set, zone 1 (short dashed line) and zone 2 (long dashed line), and one may be active.

1)Press the MENU key.

2)Select the GUARD menu.

3)Press the ENTER/SELECT key.

4)Select MODE and press the ENTER/SELECT key.

5)Select IN (or OUT).

6)Press the ENTER/SELECT key.

7)Press the MENU key.

WARNING

•The alarm should not be relied upon as the sole means for detecting possible collision situations.

•A/C SEA, A/C RAIN and GAIN should be properly adjusted to be sure the alarm system does not overlook target echoes.

Selecting guard zone type

The guard alarm can be set to sound when a tar- get either enters (or exits) the guard zone. You can select which type of guard alarm you want to use through the GUARD menu. N-type: IN type alarm only.

In alarm: The alarm sounds on targets entering the guard zone. (IN) appears at the top right-hand corner when the In alarm is selected.

Out alarm: The alarm sounds on targets exiting the guard zone. (OUT) appears at the top right-hand corner when the Out alarm is selected.

Dashed line: no alarm

Guard zone

IN ALARM

OUT ALARM

Figure 1-24 In and out alarms

Activating the guard zones

Two guard zones may be set and one of them may be active. Select the guard zone to make active on the GUARD menu.

1)Press the MENU key.

2)Select the GUARD menu.

3)Press the ENTER/SELECT key.

4)Select AREA NO. and press the ENTER/SE- LECT key.

5)Select guard zone to make active; GUARD1 (or GUARD2).

6)Press the ENTER/SELECT key.

7)Press the MENU key.

Setting a guard zone

1)Referring to (1) in Figure 1-30, operate the trackball to place the cursor at point A or B.

2)Press the GUARD ALARM key. GUARD1 (or GUARD2) SET appears at the top right cor- ner on the display. See Figure 1-30 (2).

3)Operate the trackball to place the cursor at point C or D. See Figure 1-30 (3). GUARD1 (or GUARD2) IN (or OUT) appears.

4)Press the GUARD ALARM key.

1 – 22

Page 37 Page 39
Image 38
Page 37 Page 39
Contents Marine Radar 00080735211 Safety Information Do not diassemble or modify the equipment Radio Frequency Radation Hazard IiiUse the correct fuse Compliance with R&TTE Directive 1999/5/EC Table of Contents Maintenance Vii Features Word to FR-8051/8111/8251 OwnersForeword Configuration of FR-8051/8111/8251 Transceiver Module SpecificationsAntenna Unit Environmental Conditions Power Supply and Power ConsumptionDisplay Unit OthersXii Equipment ListsStandard Set Xiii Optional EquipmentSpare Parts Categorization by Specification XivOperation Control DescriptionDisplay Indications 25 NMDisplay indications lower part Transmitting, Stand-by Turning the Radar On/OffSelecting Range Presentation Mode Selecting presentation modeDescription Changing pages on the Initial menu Menu OverviewBasic menu operation Menu tree MK Erase erase all fixed marksInitial Tune SET AUTO, Manu SPD Mode MAN, LOG, NAV Adjusting Picture Brilliance Tuning the ReceiverAdjusting Sensitivity Selecting tuning modeSuppressing Sea Clutter Adjusting Brilliance of Control Panel and MarkersAdjusting Range Ring Brilliance Automatic anti-clutter controlMeasuring the Range Suppressing Rain ClutterHeading and North Markers Measuring range by the range ringsMeasuring Bearing Canceling the cursor offset Collision Assessment by Measuring Range Offset EBLIndex Lines Off-centering the PictureFunction key ZoomInscribing Marks on the Display Automatic speed input Own Ship SpeedTurning on a function Echo Trails Ship’s GraphicInterference Rejector Manual speed inputTrail time Canceling echo trailStarting echo trail Trail referencePlotting a target Electronic Plotting E-plotTrail brilliance True or relative vector Canceling target plottingTarget data Vector timeSelecting guard zone type Setting a Guard Alarm ZoneSetting a guard zone Activating the guard zonesCanceling the guard zone and guard alarm Watch AlarmSilencing the aural alarm How to turn on echo averagingSuppressing Second-Trace Echoes 26 Echo averageNoise Rejection Presetting pulselengthEcho Stretch Selecting PulselengthSelecting pulselength set to use Waypoint DisplayOutputting Cursor Position TLL data Sector Blanking Alarm Output Signal On/OffSelecting Unit of Range Measurement, Bearing Reference This page is intentionally left blank Radar Picture, Target Properties and Radar Pulse Range ResolutionRadar Observation Indirect echoes Bearing ResolutionFalse Echoes Multiple echoesMinimum range Minimum and Maximum RangesSide-lobe echoes Blind and shadow sectorsLocating a Ship or Survival Craft in Distress by Sart Gain This page is intentionally left blank Maintenance When Working on the Antenna UnitPeriodic Maintenance Schedule Troubleshooting Simple TroubleshootingAdvanced-level Troubleshooting Serviceman qualificationProblem Check point and probable Remedy Cause Problem Check point and probable Remedy Cause Diagnostic Test Diagnostic test, test patternThis page is intentionally left blank Location of Parts Antenna UnitRF Transceiver Unit Modulator TriggerRF transceiver unit FR-8051/8111 Display Unit common to all models Display unit, top viewDisplay unit, right side view This page is intentionally left blank Performance Monitor Operating a performance monitorFluxgate Heading Sensor C-2000 Auto Plotter ARP-15Video Plotter RP-15 Page

FR-8251, FR-8111 specifications

Furuno has long been a leader in marine electronics, and its FR-8251 and FR-8111 radar systems continue that tradition. Both are advanced systems designed specifically for professional mariners who demand high performance, reliability, and technological sophistication in their navigational tools.

The Furuno FR-8251 is a powerful radar system that boasts a range of features tailored for commercial vessels. With a 25 kW transmitter, the FR-8251 delivers exceptional performance, providing a clearer and more detailed image of the maritime environment. It is equipped with advanced signal processing technology, including the Doppler processing feature, which allows for the detection of moving targets. This is highly beneficial for collision avoidance, as it provides accurate information regarding the speed and direction of other vessels.

Another noteworthy feature of the FR-8251 is its large, high-resolution display that enhances visibility and ease of use, even in challenging weather conditions. The user interface is straightforward, allowing for quick adjustments and easy navigation through the various settings. It supports a variety of display formats and allows for customization, enabling operators to tailor the information presented according to their specific needs.

On the other hand, the Furuno FR-8111 is equally impressive and designed as a more compact solution without sacrificing performance. This model comes with a 12 kW output and is specifically crafted for smaller vessels, yet it still delivers high-quality radar coverage. Utilizing Furuno’s renowned Automatic Target Tracker (ATT) technology, the FR-8111 enables mariners to efficiently track multiple targets, significantly enhancing situational awareness.

Additionally, both the FR-8251 and FR-8111 come with integrated ARPA (Automatic Radar Plotting Aid), providing users with sophisticated tools for navigation and collision avoidance. The presence of multiple target tracking empowers operators to make informed decisions, optimizing safety at sea.

Furuno’s commitment to reliability and durability is evident in both models, which are designed to withstand the harsh marine environment. Their robust build quality ensures longevity, while their advanced technologies offer peace of mind.

Both the Furuno FR-8251 and FR-8111 are excellent choices for professional mariners seeking cutting-edge radar systems. With their impressive performance, user-friendly interfaces, and advanced technologies, these radar systems set the standard in marine navigation, providing essential support for safe and efficient voyages.
Top Page Image Contents