Furuno 851 MARK-2 User Manual

MARINE RADARMODEL 851 MARK-2

2-12. OPERATION2.1 Control DescriptionOmnipadShifts cursor, VRMand EBL; selectsitems and optionson menu.Selects display mode;erases heading errorindic

2-22.2 Display Indications and Markers TRAIL15SG ( IN )FTC1ESIR0.5RangeRange ring intervalEcho trail, AUTO tuningEcho trail elapsed time,echo trail ti

2-3Note: When the heading signal is lost, theHDG readout at the top of the screenshows ***.*. This warning stays onwhen the heading signal is restored

2-42.7 Adjusting Control PanelIlluminationProcedure1. Press the [MENU] key.2. Press the omnipad at 6 o’clock toselect Backlight/Brilliance and pressth

2-5How to adjust STC (suppressingsea clutter)Echoes from waves can be troublesome,covering the central part of the display withrandom signals known as

2-6Adjusting FTCTo suppress rain clutter from heavy stormsor scattered rain clutter, adjust the FTCamong 0, 1 and 2 (0 is off). The FTC circuitsplits

2-7By VRM1. Press the [VRM] key to display theVRM.2. Press the omnipad to place the VRMon the inside edge of the target.3. Check the VRM readout at th

2-8Tips for measuring the bearing• Bearing measurements of smallertargets are more accurate; the center oflarger target echoes is not as easilyidentif

2-9Menu descriptionTable 2-1 Menu description TD WideMenuFunction1. Selects control panel backlighting; four is maximum backlighting.2. Selects

2-102.13 Selecting the Display ModeThe display mode may be selected with the[DISP MODE] key. Four modes areavailable (with navigation input): Normal,N

C 9-52, Ashihara-cho, Nishinomiya, Japan Telephone: 0798-65-2111 Telefax: 0798-65-4200 Your Local Agent/Dealer All rights re

2-112.14 The Window DisplayThe window display appears at the bottomleft (or right) 1/4 of the display. Two types ofwindow displays are available: zoom

2-122.15 Selecting the Presentation ModeThis radar provides four presentationmodes: head-up, course-up (course-up orwaypoint-up; selectable on menu),

2-13The guard alarm is a useful anti-collision aid, but does not relieve the operator of the responsibility to also keep a visual lookout for possible

2-14Canceling the guard zonePress and hold down the [GUARD] keyuntil the guard zone disappears.Notes on the guard alarm• When the radar range is less

2-152.18 Suppressing Noise InterferenceNoise interference appears on the screenas many bright dots. These dots can besuppressed by turning on the nois

2-162.21 Echo TrailsYou can show the trails of targets inafterglow. This function is useful for alertingyou to possible collision situations.Starting

2-172.22 Navigation Data DisplayNavigation data can be displayed at thescreen bottom if this radar receivesappropriate navigation input in NMEA 0183fo

2-1810. Press the omnipad at 3 o'clock/9o'clock to select M (meters), FA(fathoms) or FT (feet) as desired andpress the [ENT] key.11. Press t

2-192.24 Selecting Unit of Measurement for RangeThe unit of measurement for the VRM andcursor can be nautical miles, kilometers, orstatute miles. You

2-20Canceling watchman1. Press the [MENU] key.2. Press the omnipad at 6 o’clock toselect Mode & Function and press the[ENT] key.3. Press the omnip

iDo not open the equipment.Hazardous voltage which can cause electrical shock, burn or serious injury exists inside the equipment. Only qualified per

2-21Note 1: The depth display scale changesautomatically with depth and themaximum depth is 1,000 meters.Note 2: The barometer display is updatedhourl

3-13. INTERPRETING THE DISPLAYAs an aid to navigation, radar can be a veryvaluable tool. No other electronicnavigation aid can give you the ability to

3-23.2 Target Properties andRadar Wave ReflectionGenerally, larger targets can be seen onthe radar display at greater ranges,provided line-of-sight ex

3-3Radar is able to display twodistinct target echoes.TargetHorizontalbeamwidthDirection ofscanner rotationTargetHorizontalbeamwidthDirection ofscanne

3-4Indirect echoesIndirect echoes may be returned fromeither a passing ship or returned from areflecting surface on your own ship, forexample, a stack

3-53.6 SART Note: The SART (Search and Rescue Transponder) information below is excerpted from IMO SN/Circ 197 Operation of Marine Radar for SART De

3-6Radar bandwidthThis is normally matched to the radarpulselength and is usually switched withthe range scale and the associatedpulselength. Narrow b

3-73.7 Racon (Radar Beacon)A racon is a radar transponder which emitsa characteristic signal when triggered by aship’s radar (usually only the 3 centi

4-14. MAINTENANCE & TROUBLESHOOTINGThis chapter tells you how to keep yourradar in good working order. Beforereviewing this chapter please read t

4-24.2 Replacing the FuseThe fuse in the power cable protects theequipment against reverse polarity of ship’smains, overcurrent, and equipment fault.

iiTABLE OF CONTENTSFOREWORD... ivSYSTEM CONFIGURATION ... v1. PRINCIPLE OF OPERATION1.1 What is

4-34.4 TestThe self test facility checks the keyboard,ROM and RAM for proper operation. Youmay run the test as follows.1. Press the [MENU] key.2. Sele

A-1MENU TREE1. Backlight/Brilliance2. P/L, IR, NR & Radar Mode3. Nav Data4. Mode & Function5. Tuning (AUTO, MANUAL)6. Self Check (Checks equim

SP - 1 SPECIFICATIONS OF MARINE RADAR MODEL 851 MARK-2 1. GENERAL (1) Indication System PPI Daylight display, raster scan, 4 tones in monochrom

SP - 2 4. DISPLAY UNIT (1) Picture Tube 8 inch rectangular monochrome LCD, 122.4 mm x 163.1 mm (2) Effective Area 481(H) x 640(V) dots, Effe

SP - 3 5. POWER SUPPLY (1) Rated Voltage/Current 12-24 VDC: 5.0-2.5 A (2) Rectifier (option) 100/110/115/200/220/230 VAC, 1 phase, 50/60 Hz

Index-1INDEXAA.C RAIN ...2-5BBRILL key ... 2-1, 2-3Backligh

Index-2PP/L, IR, & Radar menu ...2-9POWER key ...2-1Post Disp Mode ...

iii MENU TREE... A-1 SPECIFICATIONS...SP-1 INDEX...

ivFOREWORDCongratulations on your choice of theFURUNO Marine Radar MODEL 851MARK-2. We are confident you will see whythe FURUNO name has become synony

vSYSTEM CONFIGURATIONRemote Display FMD-811External AlarmBuzzer OP03-169RectifierRU-3423Navigation DeviceEcho SounderGyro-compassShip's Main

1-11. PRINCIPLE OF OPERATION1.1 What is Radar?The term "RADAR" is an acronym meaningRAdio Detection And Ranging. It is adevice which measure

1-21.5 Radar Wave Speed andAntenna Rotation SpeedThe speed of the radar waves out to thetarget and back again as echoes isextremely fast compared to t