background image

17

        1.5

NM

 

0.5

HDG   326.8°

  66° 04. 00N

166° 04. 00E

VRM               EBL                          + CURSOR

0.675

NM

 

 240.1°

R

    

    0.646

 NM

  308.7°

R

          DEPTH                              XTE           SPD

  

350.0m                   0.05NML 30.0KT

       

    WAYPOINT                                 POSI L/L

 

12.0

NM 

    

45.0°

M

       

AUTO

Figure 2-18 Sample nav data display

Setting up the nav data display

1) Press the [MENU] key.

2) Select Nav Data and press the [ENT] key.

 NAV DATA MENU 

Select item and option
by 

▲▼

 keys.

1. Navigator
2. Nav Data Disp
3. Pos Disp Mode
4. Depth Unit
5. Temp Unit
6. STBY Display

. . . . . . . . . . . . . . . . . 

Press HM-OFF to temporarily
hide menu.

<Press MENU for main menu.>

ALL   GPS   LC
OFF   ON
L/L   TD
M   FA   FT
°C   °F
NORM   NAV

Figure 2-19 Nav data menu

3) Select Navigator; GPS, Loran C or ALL

(Select all if several navigators are con-
nected to the radar. In this case, position
data is selected in order of GPS, Loran C
and other.)

4) Select Nav Data Disp to OFF or ON.

5) Select Pos Disp Mode to L/L (latitude and

longitude or TD (Loran C).

6) Select unit of depth measurement to

meters, fathoms, or feet.

7) Select unit of measurement for water tem-

perature to Centigrade or Fahrenheit.

8) Select whether to display nav data or "ST-

BY". "NORM" for stand-by; NAv for
navigation data.

9) Press the [ENT] key followed by the

[MENU] key.

2.23 Echo Stretch (magnifying
long range echoes)

Normally, the reflected echoes from long
range targets appear on the display as weaker
and smaller blips even though they are com-
pensated by the radar’s internal circuitry. To
stretch long range echoes, in the range di-
rection, turn on the echo stretch function.

Figure 2-20 Echo stretch

Turning echo stretch on or off

1) Press the [MENU] key.

2) Select P/L & Int/Noise Rej & ES and

press the [ENT] key.

3) Select Echo Stretch.

4) ON or OFF.

  

  Echo stretch OFF                     Echo stretch ON       

Distant
echo

Содержание 821 Operators

Страница 1: ...MARINE RADAR MODEL MODEL 821 841...

Страница 2: ...har a c ho Ni s hi nom i y a J apan Telephone 0798 65 2111 Telefax 0798 65 4200 Your Local Agent Dealer All rights reserved PUB No OME 34160 MODEL 821 841 YOSH FIRST EDITION AUG 1995 G JAN 11 2001 Pri...

Страница 3: ...installation internal adjustment servicing and repair must be performed by qualified service personnel totally fa miliar with electrical circuits and servicing of the equipment Ground both the Display...

Страница 4: ...Data Display 16 2 23 Echo Stretch 17 2 24 Selecting Unit of Measurement for Range 18 2 25 Selecting Bearing Reference 18 2 26 Watchman 18 2 27 Erasing the Heading Marker 19 2 28 Deselecting Ranges 19...

Страница 5: ...asized We would appreciate hearing from you the end user about whether we are achieving our purposes Thank you for considering and purchasing FURUNO equipment Features Your radar has a large variety o...

Страница 6: ...xer Circulator with diode limiter Display Unit 1 Indication system PPI raster scan 2 Display 8 inch diagonal LCD STN semi transparent yellow mode 3 Range scales nm Range Ring Interval 0 125 0 0625 0 2...

Страница 7: ...n 12 V or 24V 10 2 V to 31 2 V DC 40 W approx 16 Protection features Protection against reverse polarity overvoltage overcurrent and internal fault 17 Compass safe distance SPECIFICATIONS MODEL 841 An...

Страница 8: ...terval Range and Bearing to Cursor Off Center OFF CENTER Watchman WATCHMAN With navigation input option Course CRS Latitude and longitude Speed SPD Range and bearing to waypoint WP Cross Track Error X...

Страница 9: ...VTG VHW Heading True HDT VHW HDG VHW HDM Heading Magnetic HDM VHW HDG VHW HDM Course True RMA RMC VTG Course Magnetic VTG RMA RMC Waypoint L L Range Bearing RMB BWC BWR Loran time difference RMA GLC...

Страница 10: ......

Страница 11: ...Equivalent to NMEA0183 Option IEC 1162 IEC 1162 In Out In Fluxgate Heading Sensor C 2000 Antenna Unit MODEL 821 Remote Display FMD 811 External Alarm Buzzer OP03 136 Rectifier RP 62 10 2 31 2VDC 115...

Страница 12: ...half the time of travel is needed to deter mine the one way distance to the target This radar automatically takes this into account in making the range calculation 1 4 How Radar Determines Bearing Th...

Страница 13: ...ship radar D A B C Heading marker Targets Own ship in center Range and bearing of a target relative to own ship are readable on the PPI A Bird s eye view of situation B Radar picture of A Figure 1 1 H...

Страница 14: ...dar range Plots targets trails Opens closes menus Turns the VRM on off Turns the EBL on off ENT MENU ECHO HM OFF RANGE TONE BRILL EBL VRM TRAIL RINGS GUARD OFF CENTER DISP MODE ST BY TX POWER Erases h...

Страница 15: ...ress the POWER key to turn the radar on or off The control panel lights and a timer displays the time remaining for warm up of the magnetron the device which produces radar pulses counting down from 2...

Страница 16: ...navigating in or around crowded harbors select a short range to watch for possible collision situations If you select a lower range while on open water increase the range occasionally to watch for ves...

Страница 17: ...e background noise on the display How to adjust STC suppressing sea clutter Echoes from waves can be troublesome covering the central part of the display with random signals known as sea clutter The h...

Страница 18: ...te In addition to reducing clutter the FTC can be used in fine weather to clarify the pic ture when navigating in confined waters How ever with the circuit activated the receiver is less sensitive The...

Страница 19: ...asure the range to a target three ways by the range rings by the cursor and by the VRM Variable Range Marker By range rings Press the RINGS key to display the range rings Count the number of rings bet...

Страница 20: ...BL on the target If it tracks along the EBL as it approaches the screen center it may be on a collision course with your vessel 2 12 Menu Operation The menu consisting of 6 sub menus mostly contains l...

Страница 21: ...uard zone or OUT alarm to targets exiting the guard zone 4 Selects VRM unit nm km or sm 5 Selects EBL reference relative or true 6 Selects ranges to use Select range to enable disable and press ENT ke...

Страница 22: ...n one of the sequences shown below depending on equipment connected and menu settings Note In the window display mode the DISP MODE key reselects zoom area To select the display mode while in the wind...

Страница 23: ...es a dashed circle and the cursor can be moved indepedently To reselect area to zoom press ENT or DISP MODE and follow steps 2 and 3 Figure 2 12 How to select the area to zoom 2 15 Selecting the Prese...

Страница 24: ...ard zone type The guard alarm can be set to sound on tar gets entering guard in or exiting guard out the guard zone Select type of guard zone as follows 1 Press the MENU key to display the menu 2 Sele...

Страница 25: ...cursor here 1 Mentally create the guard zone to set G IN 3 Drag cursor to bottom right corner of zone and press GUARD 4 Guard zone completed G IN Guard zone Drag cursor here Figure 2 14 How to set a g...

Страница 26: ...be selected to short or long on the 1 5 and 3 nautical mile ranges 1 Press the MENU key 2 Select P L Int Noise Rej ES and press the ENT key 3 Select Pulselength to SHORT or LONG 6 Press ENT and MENU...

Страница 27: ...ted When the elapsed time display freezes at 60 seconds all but the latest one minute of trails are erased and then trailing continues Continuous trail The maximum continuous trail time is 99 minutes...

Страница 28: ...Loran C and other 4 Select Nav Data Disp to OFF or ON 5 Select Pos Disp Mode to L L latitude and longitude or TD Loran C 6 Select unit of depth measurement to meters fathoms or feet 7 Select unit of...

Страница 29: ...can be displayed relative to north relative bearing or relative to true north true bearing as follows True bearing re quires heading sensor input 1 Press the MENU key 2 Select Mode Function and press...

Страница 30: ...ic pressure appears in graph form on the navigation data display during stand by If your navigation aid can output data in NMEA 0183 data format your vessel s position in latitude and longitude the ra...

Страница 31: ...d longitude or the range and bearing from own ship to the cursor You can select the indication desired by pressing the HM OFF key 2 32 Visual Alarm Indications This radar display various visual alarms...

Страница 32: ...ated energy A ship whose hull is made of conducting materials such as steel will return a rela tively strong echo 3 INTERPRETING THE DISPLAY As an aid to navigation radar can be a very valuable tool N...

Страница 33: ...earing Resolution Bearing resolution is a measure of the capa bility of a radar to display as separate tar gets the echoes received from two targets which are at the same range and are close together...

Страница 34: ...c tual range of the target as shown in Figure 3 4 Multiple reflection echoes can be re duced and often removed by decreasing the sensitivity or properly adjusting the STC Figure 3 4 Multiple echoes Si...

Страница 35: ...dar can not show targets which are below the hori zon show a target which is hidden by a larger one see around corners for example sea wall distinguish between two targets which are very close togethe...

Страница 36: ...only qualified personnel totally fa miliar with electrical circuits and service manual should work inside the display unit or scanner unit RF RADIATION HAZARD The radar scanner emits high fre quency...

Страница 37: ...e l C e c n a m r o f r e p n i p o r d r e t a w h s e r f a h t i w e m o d a r g n i n a e l c d e d n e m m o c e r y l n o e h T e s u t o n o D l o h o c l a s i t n e g a n a c y e h t s t n e...

Страница 38: ...a h r a d a r e h t u o y d n a p u d e m r a w e h t d e s s e r p o t y e k X T Y B T S t i m s n a r t t o n s e o d a n n e t n a e h t e t a t o r t i n u a n n e t n a n i e b y a m m e l b o r...

Страница 39: ...press a key Its corresponding location on the display lights in black if the key is operating prop erly 4 To escape the test press the MENU key The ROM and RAM are automatically checked If NG No Good...

Страница 40: ...finder antenna to prevent interference to the direction finder In order to minimize the chance of pick ing up electrical interference avoid where possible routing the signal cable near other onboard e...

Страница 41: ...ube fitted on the base of the radome allows the radome to breathe while not allowing entry of water from outside into the radome Be sure the tube is kept free of foreign ma terials and is not pinched...

Страница 42: ...latform Wiring and final preparation inside the antenna unit for MODEL 821 1 Drill a hole of at least 27mm through the deck or bulkhead to run the signal cable between the antenna unit and the display...

Страница 43: ...6 Put the radome on the radome base as sembly The arrow should face toward the bow Figure 5 6 How to position the radome cover MODEL 821 7 Tighten the fixing bolts for the radome 8 The cable run must...

Страница 44: ...utline drawing at the back of the manual four 12mm holes for fixing and one 27 mm hole for cable entry and one 20mm hole for the vent tube There is a cable entry cable gland out side the antenna unit...

Страница 45: ...n the antenna unit and the display unit 2 Pass the signal cable through the hole Then seal the hole with sealing com pound for waterproofing 3 Unfasten the cable clamping plate by loosening four M4 sc...

Страница 46: ...o position the radome cover MODEL 841 9 Tighten the fixing bolts for the radome 10 The cable run must be properly sup ported and must not be used to provide impromptu foot holds or hand holds Clips or...

Страница 47: ...e display unit in a position where you can view and operate it conveniently but where there is no danger of salt or fresh water spray or immersion The orientation of the display unit should be so the...

Страница 48: ...10 0 39 238 9 37 18 0 71 18 0 71 80 3 15 80 3 15 100 3 94 20 0 79 274 10 79 130 5 12 4 6 FIXING HOLES SERVICING CLEARANCE 10mm 222 8 7 236 9 3 Cutting size for flushmount Figure 5 13 How to mount the...

Страница 49: ...ASS FURUNO ELECTRIC CO LTD 10 2 31 2VDC 3 GND 1 2 Signal cable connector Connect signal cable from antenna here NMEA connector Connect navaid nere HDG connector Connect heading sensor nere Covered not...

Страница 50: ...on If your navigation aid can output data in NMEA 0183 data format your vessel s po sition in latitude and longitude the range and bearing to waypoint speed and course may be input to this radar and b...

Страница 51: ...received at the radar and external equipment 5 3 Installation Check List After completing the installation it is a good idea to check for proper installation Follow the checklist below and tick boxes...

Страница 52: ...ct a long range 4 Press the ECHO key The following display appears AUTO 1 2 3 MAN AUTO 1 2 3 MAN GAIN STC A C RAIN 00 FTC 0 1 2 12 ECHO KEY TO EXIT Current level Item selected for adjustment Figure 5...

Страница 53: ...MAGnetic compass or GYROcompass 5 Press the ENT key Leave the menu open to complete the next several adjustments 5 7 Relative Bearing Alignment You have mounted the antenna unit facing straight ahead...

Страница 54: ...bject for example a harbor wall or straight pier will not appear with straight edges namely they will be seen as pushed out or pulled in near the pic ture center The range of objects will also be inco...

Страница 55: ...ubber cover DJ Connector Boot band Cable Display unit DJ 1 2 Cover the connector with the rubber cover The projection on the connector base is inserted into the groove on the rubber cover Display unit...

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