JRC RADAR 1800 User manual

INSTRUCTION MANUAL
1800
RADAR
Color Radar / Plotter
1800
RADAR
COLOR LCD RADAR-PLOTTER
MOB MENU
RANGE
NAV
MODE
EBL/VRM
CENTER
BRT/CLR
STBY
OFF
TX
OFF
PUSH
OPEN
PUSH
OPEN
C-MAP CARD
PC I/F PORT
PUSH
EVENT/ENT
PUSH
SELECT
N 42 31.000'COG122.3 T DGPS
W 81 49.000'SOG 25.5KTS

1
Color Radar/Plotter
Before You Begin
Thank you for purchasing our RADAR 1800 Color LCD
Radar/Plotter.
This unit is a sophisticated and easy to use integrated color radar and
color plotter. When the unit is connected to a GPS or Loran
navigation system, the color plotter function allows you to continu-
ously display latitude, longitude, scale division and track line of the
vessel color.
•This unit is a compact LCD radar with a 2 kw transmitter & 6.5
inch color LCD. Before attempting to operate it, read this
instruction manual thoroughly to correctly and safely operate this
unit in accordance with the warning instructions and operation
procedures in this manual.
•Storing this instruction manual carefully for future reference is
highly recommended. In the event that you have an operational
problem or malfunction, this manual will provide useful
instructions.
•This unit is an aid to navigation. Its accuracy can be affected by
many factors including equipment failure or defects, environmental
conditions, and improper handling or use. It is the user’s
responsibility to exercise common prudence and navigational
judgment. This unit should not be relied on as a substitute for such
prudence and judgment.
•The LCD uses 224,000 or more TFTs (Thin Film Transistor).
If some pixels on the screen are not clear, the color is different, or the
screen is brighter than usual, it is not because of defect, instead it is
because of inherent characteristics of the TFT display technology.
Trademarks of other companies C-MAP® Micro C-Card used in this
manual is a trademark of C-MAP Co., Ltd.

2
Symbols Used In This Manual
Related Symbol Marks
In this manual, and on the equipment, we use several warning signs to call
your attention to important items that, if not handled correctly, could present
danger to yourself or property. These warning note classifications are as described
below.
Please be fully aware of the importance of these items before using this
manual.
WARNING Indicates warning items that, if ignored, may result in
serious personal injury or even death.
CAUTION Indicates cautionary items that, if ignored, may result
in personal injury or physical damage.
Examples of Related Symbol Marks Used in this Manual
and on the Unit
Each mark is intended to alert the user to the presence of
precautions including danger and warning items. The picture in
each mark alerts you to operations that should be carefully
performed.
Each mark is intended to alert the user to the presence of
prohibited activity. The picture/word in/beside each mark alerts
you to operations that are prohibited.
Each mark is intended to alert the user to the presence of neces-
sary instructions. The picture in each mark alerts you to opera-
tions that must be performed.
WARNING LABEL
You can see the warning label on the top of the unit.
Do not attempt to remove the warning label from the unit or impair or
modify it.

3
Usage Hints
Do not remove the cover of the
unit. Doing so may cause an
electric shock
by high voltage
from within
the product’s
enclosure.
Do not touch the radiator fin of the
unit. Doing so
may cause a burn
by high
temperature.
Do not try to disassemble or
modify the unit.
Doing so may
cause a fire,
electric shock
or malfunction.
Do not place objects
containing liquid or
metal fragments on
top of the unit,
which might be
spilled or dropped
into the unit.
Doing so may cause a
fire, electric shock or malfunction.
WARNING
Operate the unit only
on 12 VDC.
Not doing so may
cause fire or
electrical shock.
Do not (dis)connect the power
cable(from) to the main unit with
wet hands, as
doing so
may cause
electrical
shock.
In the event that you spill or drop
any liquids or metals, etc. inside the
unit, turn off the main unit, unplug
the power supply terminal, and
contact our company, branch, or
local office.
Continuing
operation as
is may cause
a fire, electric
shock or
malfunction.
In the event that smoking or burning
odors are detected, immediately
terminate operation of the unit and
contact your dealer. Continuing
operation as is may cause
a fire or
electrical
shock.
Never
attempt
to service
the interior
of the unit.

4
When disconnecting
the power cable,
be sure to grasp
it by the plug.
Never pull on the
connecting cord
itself, as doing so
increases the risk
of malfunction.
Do not drop the unit
into water. When
disconnecting the
connector on the
back side,
be sure it does
not get wet, as
doing so increases
risk of electrical shock or
malfunction.
Do not use or
install the unit
in a place where
the LCD is subject
to direct
sunlight, or in
a location near
heat sources
where the temperature
is 50°C (Display Unit), 55°C (Scanner
Unit) or more.
Doing so may cause a malfunction
or defect.
Do not turn on the unit immediately
after moving it from a cold place to a
warm one. Let the unit stand for
around 30 minutes before turn on,
until the inside temperature of the
unit reaches the same level as that of
the room it was moved to.
Not doing so increases risk of
malfunction.
Be sure to connect a cable to the
grounding terminal when installing.
Not doing so may cause an electric
shock or
excessive
noise from/
to other
equipment.
Do not use any type
of organic solvent
such as thinner
or benzine
when
cleaning the
surface of
the cabinet.
Doing so may damage the coating or
the finish of the unit’s surface.
Remove any dust and clean the unit’s
surface with a soft dry cloth.
This device is only an aid to
navigation.
•The information displayed by the
unit cannot be directly used for
navigation purposes.
It must be used together with the
appropriate marine charts.
•The unit does not automatically
assess position information.
It is the user's responsibility to judge
position and navigational
information.
CAUTION

5
EMC Installation & Service Guidelines
IMPORTANT NOTE
All JRC equipment and accessories are designed to the highest industry
standards for use in a marine environment. Their design and manufacture
conforms to the appropriate Electro Magnetic Compatibility (EMC) standards,
but good installation is required to ensure that performance is not compromised.
Although every effort has been taken to ensure that the equipment will perform
under all conditions, it is important to understand what factors could affect
operation of the product. Complete installation instructions are provided in
SECTION 2 of this manual. Some preliminary suggestions are made below.
Installation
To avoid the risk of operating problems, all JRC equipment and cables
connected to it should be:
•At least 1m (3 feet) from any equipment transmitting or cables carrying radio
signals e.g. VHF radios, cables and antennas. In the case of SSB radios the
distance should be increased to 2m (7 ft).
•More than 2 m (7 ft) from the path of a radar beam. A radar beam can nor-
mally assume to spread 20 degrees above and below the radiating element.
•The equipment should be supplied from a different battery than the one used
for engine start. Voltage drops below 10.2V in the power supply to our
products can cause the equipment to reset. This will not damage the
equipment, but will cause some loss of information and this can also change the
operating mode.
•Genuine JRC Cables should be used at all times. Cutting and rejoining these
cables can compromise EMC performance and should therefore be avoided
unless doing so is suggested in the installation manual.
Check Before Going to Sea
•Always check the installation before going to sea to make sure that it is not
affected by radio transmissions, engine starting, low battery voltage, or other
problems.
•In some, installations, it may not be possible to prevent the equipment from
being affected by external influences. In general this will not damage the
equipment but it can lead to it resetting, or momentarily may result in faulty
operation. This can then be avoided by turning off the RADAR 1800 prior to
starting the boat engines for instance.

6
Servicing and Safety
•JRC equipment should be serviced only by authorized JRC service engineers.
They will ensure that service procedures and replacement parts used will not
affect performance. There are no user serviceable parts in any JRC product.
•Some products generate high voltages, and so never handle the cables/connec-
tors when power is being supplied to the equipment.
•Always report any EMC related problem to your nearest JRC dealer. We will
use any such information to improve our quality standards.
Suppression Ferrites
The following illustration shows the range of suppression ferrites fitted to
JRC equipment.
Notes for Suppression Ferrite Installation
Connections to other equipment
If your JRC equipment is going to be connected to other equipment using a
cable not supplied by JRC, a suppression ferrite MUST always be fitted to the
cable close to the JRC unit.

7
Outside View
Display Unit
GPS/DGPS Sensor (Option)
GPS-112/GPS-112W DGPS212/GPS-212W
Scanner Unit

8
Contents
Before you begin ............................................................................... 1
Symbols used in This Manual .......................................................... 2
Usage Hints ....................................................................................... 3
EMC Installation & Service Guidelines ........................................... 5
Outside View ..................................................................................... 7
Definition on Terms......................................................................... 16
SECTION 1 Introduction ....................................... 19
Function ........................................................................................19
Features .........................................................................................20
Components ..................................................................................21
Standard Equipment..................................................................... 21
GPS Sensor (Option) ................................................................... 21
Construction .................................................................................22
System Configuration....................................................................24
SECTION 2 Installation.......................................... 25
Installing the Display Unit ............................................................25
Choosing a Location for Installation............................................. 25
Standard Mounting ...................................................................... 25
Console Mounting/ Surface Mounting ......................................... 27
Installing the Scanner unit ............................................................28
Connecting the Scanner Unit Cable ............................................. 28
Installing the GPS/DGPS Sensor ..................................................29
Selecting the Position for Installation ............................................ 29
Installation Procedure ................................................................... 31
Connecting DC Power ..................................................................33
Grounding the Display Unit .........................................................34
Connecting GPS/DGPS Sensor or Making NMEA0183 Data
Connections (Option) ...............................................................35
Connecting Electronic Compass/GPS Compass (Option) .............37
Initial Operation and Set-up .........................................................37
Inspection after Installation .......................................................... 37
Operating the INSTALLATION menu ........................................ 38
RADAR SET UP ......................................................................... 38

9
TUNE PRESET ..................................................................... 38
Relative BEARING alignment ................................................ 39
DISPLAY TIMING ................................................................ 39
STC PRESET ......................................................................... 39
Connecting Personal Computer ....................................................40
Inserting a Chart Card ..................................................................41
Removing a Chart Card.................................................................41
SECTION 3 Operation ........................................... 42
Screen Layout ................................................................................42
Control Panel ................................................................................45
Rear Panel .....................................................................................47
Basic Operations ...........................................................................48
The Power Control (Turning the Radar ON and OFF) ................ 49
LCD Backlight and Contrast Control........................................... 49
Display Modes.............................................................................. 49
Vessel’s Information/Waypoint’s Information................................ 53
Graph Display .............................................................................. 54
Finding Function.......................................................................... 54
Using the Jog Dial ........................................................................ 55
Using the Joy Stick ....................................................................... 55
Changing CURSOR Operation in RADAR/CHART Mode ........ 55
General MEMU Operation .......................................................... 55
Buzzer ON/OFF .......................................................................... 56
Setting LANGUAGE ................................................................... 56
Radar Operation ...........................................................................57
Selecting a RANGE ...................................................................... 57
Adjusting Receiver Sensitivity ....................................................... 58
Adjusting TUNING ..................................................................... 58
Reducing SEA CLUTTER ........................................................... 58
Adjusting RAIN CLUTTER ........................................................ 59
Setting OFFSET .......................................................................... 59
Range Measurement ..................................................................... 59
Bearing Measurement ................................................................... 60
Changing CURSOR Operation Mode
in RADAR/CHART Screen ..................................................... 60
RADAR Operating Menu ............................................................ 61
RINGS ......................................................................................... 61
DISPLAY MODE (BEARING) ................................................... 61

10
INTERFERENCE REJECTION ................................................ 62
Setting AUTO/MANUAL SEA Clutter Rejection ........................ 63
Setting AUTO/MANUAL TUNING........................................... 63
Target EXPANDER ..................................................................... 63
PROCESS .................................................................................... 64
TRAILS........................................................................................ 64
CLEAR TRAILS .......................................................................... 65
WAYPOINT ................................................................................ 65
Setting Radar COLOR ................................................................. 65
PLANNED-TX MODE .............................................................. 66
Setting GUARD ZONE............................................................... 67
Display of RADAR Transponder .................................................. 69
Plotter Operation ..........................................................................71
Using the Joy Stick in CHART mode ........................................... 71
Enter the Event ....................................................................... 71
Enter the WAYPOINT or the MARK ..................................... 71
Enter the WAYPOINT ........................................................... 71
Soft Keys at the WAYPOINT Mode ....................................... 72
Enter the MARK Mode .......................................................... 72
Man Overboard ............................................................................ 73
Range Setting ............................................................................... 73
In the CHART display ............................................................ 73
In the CDI/COMPASS display............................................... 73
In the RADAR display ............................................................ 73
In the RADAR/CHART display ............................................. 74
Navigation Setting ........................................................................ 74
SELECT ROUTE (Selecting Navigation) ............................... 74
WAYPOINT DIRECT (Selecting a waypoint) ........................................................ 74
PLANNED ROUTE (Navigating according to a planned route) ............................. 75
TEMPORARY ROUTE (Navigating according to a temporary route) .................... 75
NEAREST PORT (Searching for and navigating to a nearest port) ......................... 77
PREVIOUS MOB (Setting a waypoint to the MOB).............................................. 77
SEQUENCE (Selecting the order of waypoint navigation) ..... 77
WPT STEP (Selecting the method to switch the waypoint) .... 78
NEXT WPT (Skipping to the next waypoint)......................... 78
PREV. WPT (Skipping to the previous waypoint) ................... 78
STOP WATCH ...................................................................... 78
TIDAL INFO
(Displaying tide height graph of a specified point).............. 79

11
OBJECT INFO
(Displaying detailed information of a specified point) ........ 79
EDIT ........................................................................................... 80
Editing a waypoint .................................................................. 80
EDIT IN CHART .................................................................................................. 80
Storing a waypoint ............................................................................................ 80
Modifying a waypoint ....................................................................................... 81
Erasing a waypoint ............................................................................................ 81
Moving waypoint .............................................................................................. 81
Go to a waypoint .............................................................................................. 81
EDIT BY LIST ....................................................................................................... 82
Storing a waypoint ............................................................................................ 82
Modifying a waypoint ....................................................................................... 82
Copying a waypoint .......................................................................................... 83
Erasing a waypoint ............................................................................................ 83
Jumping to a waypoint list page ........................................................................ 83
Planning a route...................................................................... 83
Storing a new route ................................................................................................. 83
Editing a route ........................................................................................................ 84
Adding a new waypoint ........................................................................................... 84
Editing a waypoint .................................................................................................. 84
CHANGE ............................................................................................................... 84
INSERT .................................................................................................................. 84
ERASE .................................................................................................................... 84
Converting a track to a planned route ..................................... 85
Selecting a new route ............................................................................................... 85
DIVIDE .................................................................................................................. 86
CONSTRUCT ....................................................................................................... 86
Construction........................................................................... 86
Constructing a line .................................................................................................. 86
Constructing a rectangle .......................................................................................... 87
Menu Operations ..........................................................................88
General......................................................................................... 88
Top Menu .................................................................................... 88
RADAR SETTING ................................................................ 88
RINGS .................................................................................................................... 88
BEARING .............................................................................................................. 89
INTERFERENCE REJECTION ........................................................................... 89
SEA ......................................................................................................................... 89
TUNE ..................................................................................................................... 89
EXPANDER ........................................................................................................... 89
PROCESS ............................................................................................................... 89
TRAILS .................................................................................................................. 89
CLEAR TRAILS ..................................................................................................... 89
WAYPOINT ........................................................................................................... 89

12
COLOR .................................................................................................................. 89
TX-PLAN ............................................................................................................... 90
PLOT SETTING ................................................................... 90
TRACK ERASE (Erasing a track) ........................................................................... 90
MARK ERASE (Erasing a mark) ............................................................................. 90
MARK SIZE (Selecting a size) ................................................................................. 90
TRACK SETUP ..................................................................................................... 90
TRACK PLOT (Selecting memory intervals) .................................................... 90
MEMORY SIZE (Selecting a number of points) ............................................... 90
TRACK COLOR (Selecting a color)................................................................. 90
VESSEL SHAPE (Selecting a mark for your vessel) ........................................... 90
VESSEL SIZE (Selecting a size of your vessel’s mark) ........................................ 90
L/L-TD CONVERT ............................................................................................... 91
POSTION DISPLAY (Selecting a format of position display) .......................... 91
LORAN-C CHAIN (Selecting a format of LORAN-C CHAIN) ...................... 91
TD CORRECTION (Selecting a format of time difference) ............................ 91
CHART DISPLAY .................................................................................................. 91
CHART DISP MODE (Selecting a chart display mode) ................................... 91
SCALE BAR (Turning the scale bar ON/OFF) ................................................. 91
VECTOR RAY (Selecting a type of direction display) ....................................... 91
BRG LINE (Turning the direction line ON/OFF) ............................................ 91
WAYPOINT (Selecting a waypoint display) ...................................................... 91
CURSOR INFO (Turning the cursor information ON/OFF) .......................... 91
L/L GRID (Turning the grid ON/OFF) ........................................................... 91
CHART COLORS ................................................................................................. 92
LAND (Selecting a color for the land)............................................................... 92
SEA (Selecting a color for the sea) ..................................................................... 92
L/L GRID (Selecting a color for the grid) ......................................................... 92
CUSTOM CHART ................................................................................................ 92
CHART BOUNDARY ..................................................................................... 92
LIGHT SECTORS ........................................................................................... 92
BUOY & BEACON ......................................................................................... 92
NAMES ............................................................................................................ 92
LAND MARKS ................................................................................................ 92
RIVER & LAKE ............................................................................................... 92
CULTURAL ..................................................................................................... 92
BOTTOM TYPE.............................................................................................. 92
UNDER WATER ............................................................................................. 92
SOUNDING DEPTH ..................................................................................... 92
DEPTH SHADING ......................................................................................... 92
DEPTH CONTOUR ...................................................................................... 93
DETAILED ...................................................................................................... 93
GRAPH SETTING ................................................................ 93
GRAPH DISPLAY (Selecting what to display) ........................................................ 93
DEPTH SCALE (Setting a display range of the water depth graph) ........................ 93
TEMP. SCALE (Setting a display range of the temperature graph) .......................... 93

13
SPEED SCALE (Setting a display range of the speed graph) ................................... 93
GPS SETTING ...................................................................... 94
VESSEL POSITION (Setting the vessel position) ................................................... 94
TIME DIFFERENCE (Setting the time difference) ................................................ 94
ANTENNA HEIGHT (Setting the antenna height) ............................................... 94
GEODETIC DATUM (Setting a geodetic system) ................................................. 94
FIX MODE (Setting the fixing mode) .................................................................... 94
HDOP LEVEL (Setting the HDOP level) .............................................................. 95
AVERAGE (Setting an interval to average the data)................................................. 95
EXCLUDE SAT (Setting the satellite number not used) ......................................... 95
DGPS SETTING ................................................................... 95
MODE (Setting the reception mode of the beacon) ................................................ 95
FREQUENCY (Setting the beacon frequency) ........................................................ 95
BAUDRATE (Setting the beacon baud rate) ........................................................... 95
WAAS SETTING ................................................................... 96
MODE ................................................................................................................... 96
RANGING ............................................................................................................. 96
NG WAAS .............................................................................................................. 96
WAAS NO. ............................................................................................................. 96
INSTALLATION ................................................................... 97
SIMULATION (Turning the simulator ON/OFF) ................................................. 97
INITIAL POSITION (Setting the standard position of the chart display) .............. 97
CLOCK ADJUST (Adjusting the date and time) .................................................... 97
DATE & TIME (Selecting a system of time) ........................................................... 97
RADAR ADJUST (Adjusting the radar) ................................................................. 97
DATA IN/OUT ...................................................................................................... 98
TEMP. IN (Selecting temperature input) .......................................................... 98
DEPTH IN (Selecting depth data input) .......................................................... 99
COURSE IN (Selecting course data input) ....................................................... 99
POSITION IN (Selecting position input) ........................................................ 99
NMEA OUT (Putting out data) ..................................................................... 100
UNITS .................................................................................................................. 100
DEPTH (Selecting depth units) ...................................................................... 100
YOUR DEPTH (Setting custom depth units) ................................................. 100
TEMPERATURE (Changing temperature units) ............................................ 100
SPEED & DIST UNIT (Changing speed and distance units) ......................... 100
CALIBRATION ................................................................................................... 100
LAT/LON (Calibrating the longitude/latitude) ............................................... 100
MAGNETIC CORR. (Correcting the magnetic compass) .............................. 101
RESET LOG (Resetting the trip log) .............................................................. 101
OPERATION ....................................................................................................... 101
J-STICK PUSH .............................................................................................. 101
CENTERING ................................................................................................ 101
GUIDE ........................................................................................................... 101

14
CUSTOM SETUP ............................................................... 102
PRESET ................................................................................................................ 102
CUSTOM INITIALIZE ....................................................................................... 102
MEMORY COPY ................................................................ 102
USE THE CARD ................................................................................................. 103
USE THE PC ....................................................................................................... 104
ALARM ................................................................................ 105
NAV ALARM (Navigation alarms)........................................................................ 105
RADAR ALARM .................................................................................................. 107
BZ ALARM .......................................................................................................... 107
TEMP. ALARM (Temperature alarms) .................................................................. 108
CLOCK ALARM .................................................................................................. 108
BUZZER (Alarm buzzer) ...................................................................................... 108
Self Test Operation ......................................................................109
Master Reset and Language Select Operation..............................110
SECTION 4 Maintenance ..................................... 115
General ........................................................................................115
Scanner Unit................................................................................115
Radome Scanner Unit ................................................................ 116
Display Unit ................................................................................116
Cleaning the Display Unit Screen ............................................... 116
SECTION 5 Principle ........................................... 117
Radar Basics ................................................................................117
Strength of Reflection from the Targets ...................................... 117
Sea Clutters ................................................................................ 117
False Echoes................................................................................ 118
GPS/DGPS Basics .......................................................................120
GPS............................................................................................ 120
Differential GPS (DGPS) ........................................................... 121
Wide Area Augmentation System (WAAS) ................................. 122
SECTION 6 Interswitch (option).......................... 123
Outline ........................................................................................123
Components............................................................................... 123
Construction .............................................................................. 124
Installation ..................................................................................125
Setting Jumpers .......................................................................... 125
Unit Connecting Cable .............................................................. 126

15
Operation ....................................................................................128
The following is for the jumpers in the junction box. (setting 1) ........... 128
The following is for the jumpers in the junction box. (setting 2) ........... 128
SECTION 7 After-Sales Service ............................. 130
When Asking for Service .............................................................130
Checks and Inspection ................................................................130
SECTION 8 Disposal ............................................ 131
Disposal of LCD Module ............................................................131
Handling Used Lithium Batteries................................................131
SECTION 9 Specification ..................................... 132
General ........................................................................................132
Scanner........................................................................................133
Display Unit ................................................................................134
Radar ...........................................................................................135
Plotter .........................................................................................137
Input/Output Signal ...................................................................138
APPENDICES.................................................139
Wiring Diagram ..........................................................................139
Geodetic System Table .................................................................140
NMEA0183 Standard Input/Output Sentences ...........................141
Input Sentences .......................................................................... 141
Output Sentences ....................................................................... 142
Waypoint List ..............................................................................143

16
Definition on Terms
2D(two- dimensional)..... Position fixing using satellites and height information.
3D(three-dimensional).... Position fixing using satellite information only from
four or more satellites.
Anchor alarm .................. An alarm indicating that the vessel has deviated more
than the set distance from a waypoint.
Arrival alarm ................... An alarm indicating that the vessel has come within
the set distance of a waypoint.
Automatic sequencing mode
....................................... Function that automatically steps from one waypoint
to the next when the arrival perpendicular point has
been detected.
Bow ................................ The front of a vessel (nautical term)
CDI ................................ Course Deviation Indicator. Information that
indicates the extent you have strayed from the route
intended and the direction to steer.
COG .............................. Course over Ground
CUP(Course-UP) ........... An azimuth stabilized display in which a line connect-
ing the centre of own ship with the top of the display
is own ship’s intended course.
Default value .................. Factory set value
DGPS ............................. The process of correcting the inaccuracies of GPS
position data from GPS satellites by receiving a beacon
Differential Signal from a base station whose exact
position is known. And which transmits correction
data for the GPS satellites it receives.
EBL(Electric Bearing Line)
....................................... Electronic Bearing Line – A moveable vector line
radiating out from the ship indicating the bearing
thereof.
GPS(Global Positioning System)
....................................... Internationally-used positioning system.
Ground stabilization ....... A mode of display whereby own ship and all targets
are referenced to the ground using ground track or set
and drift inputs.
GPS satellite ................... GPS stands for “Global Positioning System.” Several
satellites launched by the US Department of Defense
to establish a military navigational aid system.
Guard zone ..................... A zone in which an alarm is given when a target is
detected.

17
HDOP ........................... Indicates the accuracy of Horizontal position fixing.
The smaller the number shows the more accurate the
position fixing.
When the satellites are grouped together, HDOP
increases and position fixing accuracy is poorer. When
the satellites are Farther apart, HDOP decreases and
position fixing accuracy is enhanced.
Heading .......................... The direction in which the bows of a ship are pointing
expressed as an angular displacement from north.
HL .................................. Heading Line
Hull ................................ The exterior surface of a ship.
HUP(Head-UP) ............. Display mode in which the top of the screen
corresponds to the ship’s head maker.
Initialization ................... It takes up to 20 minutes for GPS position fixing
when it is used for the first time or after a master reset
has been performed. This time can be reduced by
entering initialization values such as estimated
position, time and antenna height.
IR ................................... Interference Rejector
Manual sequencing mode
....................................... The unit sounds the arrival alarm and the operator
will manually press key to step to next leg in the route
plan when it is safe to do so.
Master reset..................... A function for clearing all settings and returning to
the factory set values (default values). Two types of
master resets are provided. A soft reset clears all data
exept for waypoint and route plan data. A hard reset
clears all data.
NM ................................ Nautical Mile(1 nm= 1,852 m)
NMEA0183.................... National Marine Electrical Association 0183.
Association establishing international standards for
communications between navigational equipment and
the standard established by NMEA.
NUP(North-UP) ............ An azimuth stabilized display in which the top of the
screen is always North.
Off-course alarm ............. An alarm indicating that the vessel has deviated more
than a set distance from a predetermined course.
Port................................. Left (nautical term).
Position fixing ................. The process of deriving the current location of a vessel
using GPS or DGPS sensor.
Range ............................. The range scale.
Range ring ...................... Fixed range ring.
RM(Relative Motion) ..... The combination of relative course and relative speed.
RM display ..................... A display on which the position of own ship remains
fixed and all targets move relative to own ship.

18
Relative bearing .............. The direction of a target from own ship expressed as
an angular displacement from own ship’s heading.
Relative course ................ The direction of motion of a target relative to own
ship’s position expressed as an angular displacement
from north. It is deduced from a number of
measurements of target range and bearing on own
ship’s radar.
Relative speed ................. The speed of a target relative to own ship’s position. It
is deduced from a number of measurements of target
range and bearing on own ship’s radar.
Route plan ...................... A plan that registers plural waypoints in a navigational
path.
Scan CORR .................... Scan Correlation, a method of target processing
enhancement using multiple scan information.
Scanner ........................... Antenna unit.
Sea stabilization .............. A mode of display whereby own ship and all targets
are referenced to the sea, using gyro heading and water
speed inputs.
Sensitivity ....................... The ability of a receiver to pick up small targets.
SOG ............................... Speed over Ground.
Starboard ........................ Right (nautical term)
Stern ............................... The rear of a vessel (nautical term).
TM(True Motion) .......... The combination of true course and true speed.
TM display ..................... A display across which own ship and each target
moves with its own true motion.
Stationary targets such as land do not move except
occasionaly when the picture display shifts position to
keep own ship on the screen.
Trails ............................... Tracks left behind radar targets showing the history of
previous target positions.
Tr ue bearing.................... The direction of a target from own ship or from
another target expressed as an angular displacement
from True North.
Tr ue course ..................... The true direction of motion of a target expressed as
angular displacement form north. It is obtained by a
vector combination of target relative motion and own
ship’s true motion.
Tr ue speed....................... The speed of a target obtained by a vector combina-
tion of target relative motion and own ship’s true
motion.
Tr ue vector ...................... The predicted true motion of a target as result of own
ship’s direction and speed input. The true vector may
be either displayed with reference to the water or to
the ground.
WAAS(Wide Area Augmentation System)
....................................... WAAS is a system that improve GPS position fixing
accuracy.

Section 1 Introduction
19
SECTION 1 Introduction
Figure 1-1
Function
Congratulations on selecting the JRC RADAR 1800 Color LCD system to
assist your navigation.
Whether you purchased this radar because of its compactness, power
economy, ease of installation, or long term reliability, one thing is certain;the
moment you turn on your RADAR 1800 Display you will know that you are
seeing a revolutionary new concept in Radar technology.
You are the proud owner of a radar system unmatched in the marine
recreational industry.
Radar signals are shown on a color LCD display with excellent graphic clarity
and detail.
A single glance at your Display will give you a complete and accurate 360˚
radar picture of other vessels, buoys and land surrounding your vessel.
By connecting with JRC’s GPS/DGPS sensor, the LCD Display allows you
to continuously display latitude, longitude, scale division and track line of the
vessel in color.
Since the color of the vessel track line can be displayed in any color and
deleted when required, it can be checked at a glance.
In addition to track line, waypoints and transit point(convenient for marking
dangerous location, shoals and fishing spots) can be stored and diplayed in color.
The distance and bearing from the ever-changing current position to a
waypoint is displayed automatically.
Since displayed sea areas can be magnified, reduced or moved as desired, it
can be used for a number of application.
System components
The Color Radar plotter RADAR 1800 consists of a compact display unit connected
to scanner unit.
Use of the GPS capabilities requires the optional GPS 112:JRC's GPS sensor.
Use of the DGPS capabilities requires the optional DGPS212:JRC's DGPS sensor.
Antenna GPS/DGPS
Display Unit