JRC JMR-5400 Series User manual

ISO 9001, ISO 14001 Certified
SEP. 2017 Edition 2CODE No.7ZPRD0952
PLOTTERPLOTTER
Not use the asbestos
For further information,contact:
URL Head office : http://www.jrc.co.jp/eng/
Marine Service Department
1-7-32 Tatsumi, Koto-ku, Tokyo 135-0053, Japan
: [email protected]
:
[phone]
e-mail
One-call
JMR-5400 SERIESJMR-5400 SERIES
INSTRUCTIONINSTRUCTION
MANUALMANUAL

i㻌
㻌
PREFACE
Thank you for purchasing the JRC Multi Function Display JMR-5400 Series.
This equipment meets the performance standards of the IMO (International Maritime
Organisation), and serves to improve safety.
zFor the best operation, read this manual thoroughly before use.
zKeep this manual in a convenient place for future reference.
Make use of this manual when experiencing operation difficulties.
zThis instruction manual illustrates only plotter operations. For radar operations, refer to
marine radar equipment instruction manuals.
zThe LCD of this equipment uses thin film transistors (TFT). If some pixels on the screen
are not clear, the colour is different, or the screen is brighter than usual, it is not because
of defect, instead it is because of inherent characteristic of the TFT display technology.
zThe information in this manual is subject to change without notice at any time.
7ZPRD0952

ii
Safety Cautions 
Cautions for High Voltage
High voltages, ranging from several hundreds to tens of thousands of volts, are used in
electronic apparatus, such as radio and radar instruments. These voltages are totally harmless
in most operations. However, touching a component inside the unit is very dangerous. (Any
person other than authorized service engineers should not maintain, inspect, or adjust the unit.)
High voltages on the order of tens of thousand volts are most likely to cause instant deaths from
electrical shocks. At times, even voltages on the order of several hundred volts could lead to
electrocution. To defend against electrical shock hazards, don't put your hand into the inside of
apparatus.
When you put in a hand unavoidably in case of urgent, it is strongly suggested to turn off the
power switch and allow the capacitors, etc. to discharge with a wire having its one end positively
grounded to remove residual charges. Before you put your hand into the inside of apparatus,
make sure that internal parts are no longer charged. Extra protection is ensured by wearing dry
cotton gloves at this time. Another important precaution to observe is to keep one hand in your
pocket at a time, instead of using both hands at the same time. It is also important to select a
secure footing to work on, as the secondary effects of electrical shock hazards can be more
serious. In the event of electrical shocks, disinfect the burnt site completely and obtain medical
care immediately.
Precautions for Rescue of Victim
of Electric Shock
When a victim of electric shock is found, turn off the power source and ground the circuit
immediately. If this is impossible, move the victim away from the unit as quick as possible without
touching him or her with bare hands. He or she can safely be moved if an insulating material
such as dry wood plate or cloth is used.
It is necessary to perform first aid immediately.
Breathing may stop if current flows through the respiration centre of brain due to electric shock. If
the electric shock is not large, breathing can be restored by artificial respiration. A victim of
electric shock looks pale and his or her pulse may become very weak or stop, resulting in
unconsciousness and rigidity at worst.

iii
Emergency Measures 
Method of First-Aid Treatment
Precautions for First-Aid Treatments
Apply artificial respiration to the person who collapsed, minimising moving as much as
possible avoiding risks. Once started, artificial respiration should be continued rhythmically.
(1) Refrain from touching the patient carelessly as a resultof the accident; the first-aider
could suffer from electrical shocks by himself or herself.
(2) Turn off the power calmly and certainly, and move the patient apart from the cable
gently.
(3) Call or send for a physician or ambulance immediately, or ask someone to call doctor.
(4) Lay the patient on the back, loosening the necktie, clothes, belts and so on.
(5) (a) Feel the patient's pulse.
(b) Check the heartbeat by bringing your ear close to the patient's heart.
(c) Check for respiration by bringing your face or the back of your hand to the patient's
face.
(d) Check the size of patient's pupils.
(6) Opening the patient's mouth, remove artificial teeth, cigarettes, chewing gum, etc. if
any. With the patient's mouth open, stretch the tongue and insert a towel or the like into
the mouth to prevent the tongue from being withdrawn into the throat. (If the patient
clenches the teeth so tight that the mouth won't open, use a screwdriver or the like to
force the mouth open and then insert a towel or the like into the mouth.)
(7) Wipe off the mouth to prevent foaming mucus and saliva from accumulating.

iv
Treatment to Give When the Patient Has a
Pulse Beating but Has Ceased to Breathe
∗Performing mouth-to-mouth artificial respiration
(1) Bend the patient's face backward until it is directed to look back. (A pillow may be
placed under the neck.)
(2) Pull up the lower jaw to open up the airway. (To spread the airway)
(3) Pinching the patient's nose, breathe deeply and blow your breath into the patient's
mouth strongly, with care to close it completely. Then, move your mouth away and
take a deep breath, and blow into his or her mouth. Repeat blowing at 10 to 15 times
a minute (always with the patient's nostrils closed).
(4) Continue artificial respiration until natural respiration is restored.
(5) If the patient's mouth won't open easily, insert a pipe, such as one made of rubber or
vinyl, into either nostril. Then, take a deep breath and blow into the nostril through
the pipe, with the other nostril and the mouth completely closed.
(6) The patient may stand up abruptly upon recovering consciousness. Keep the patient
lying calmly, giving him or her coffee, tea or any other hot drink (but not alcoholic
drink) to keep him or her warm.
Mouth-to-mouth artificial respiration with the patient's head lifted
[1] (1) Lift the back part of the patient's
head. Support the forehead with one
of your hand and the neck with the
other hand.→[1].
Many patients will have their airways
opened by lifting their head in this
way to ease mouth-to-mouth
artificial respiration.
[2]
(2)
Closing the patient's mouth with your
mouth, press your cheek against the
patient's nose→[2].
Alternatively, hold the patient's nose
with your finger to prevent air leak
→[3].
[3]
(3) Blowing air into the patient's lungs.
Blow air into the patient's lungs until
chest is seen to rise. The first 10
breaths must be blown as fast as
possible.
Fig. 1 Mouth-to-mouth artificial respiration

v
Flow of Cardiopulmonary Resuscitation (CPR)
A person is collapsing.
- Secure the safety of the surrounding area.
- Prevent secondary disasters.
Check for response.
-
Call while tapping the shoulder.
Breathing
Recovery position
- Lay the injured or
ill person on
his/her side and
wait for the arrival
of the emergency
services.
Not responding
Ask for help.
- Make an emergency call.
-
Ask to bring an AED.
Listen to the appeal of the
injured or ill person and give
the necessary first-aid
treatment.
Responding
Not breathing
Give 2 rescue breaths; omittable Note(
1
)
Give CPR.
- 30 chest compressions
-
Give 2 rescue breaths; omittable Note(
1
)
Note
(
1
) Omission of rescue breathing:
If there is a fear of infection because the
injured or ill person has an intraoral injury,
you are hesitant about giving mouth
-to-
mouth
resuscitation,
or preparing the mouthpiece for
rescue breathing takes too long, omit rescue
breathing and proceed to the next step.
Open the airway.
-
Check for breathing.
Arrival of an AED
- Turn on the power.
- Use the AED by following its voice prompts.
Fitting of the electrode pads, etc.
Automatic electrocardiogram
analysis
- Do not touch the injured or ill
person.
Electric shock is needed.
Electric shock is not needed.
Delivery of electric shock
Resume CPR from chest
compressions by following the
voice prompts of the AED.
When the injured or ill
person has been
handed over to the
emergency services or
has started moaning or
breathing normally, lay
him/her on his/her side
in a recovery position
and wait for the arrival
of emergency services.
When to
stop CPR
A person is collapsing.
- Secure the safety of the surrounding area.
- Prevent secondary disasters.
The AED
automatically
analyses the
heart rhythm
every 2 min.

vi
Specific Procedures for Cardiopulmonary Resuscitation (CPR)
1. Check the scene for safety to prevent secondary disasters
a) Do not touch the injured or ill person in panic when an accident
has occurred. (Doing so may cause electric shock to the
first-aiders.)
b) Do not panic and be sure to turn off the power. Then, gently move
the injured or ill person to a safe place away from the electrical
circuit.
2. Check for responsiveness
a) Tap the shoulder of the injured or ill and shout in the ear saying, "Are you OK?"
b) If the person opens his/her eyes or there is some response or gesture, determine it as
"responding." But, if there is no response or gesture, determine it as "not responding."
3. If responding
a) Give first-aid treatment.
4. If not responding
a) Ask for help loudly. Ask somebody to make an emergency call
and bring an AED.
• Somebody has collapsed. Please help.
• Please call an ambulance.
• Please bring an AED.
• If there is nobody to help, call an ambulance yourself.
5. Open the airway
a) Touch the forehead with one hand. Lift the chin with the two fingers
of the middle finger and forefinger of the other hand and push down
on the forehead as you lift the jaw to bring the chin forward to open
the airway. If neck injury is suspected, open the airway by lifting the
lower jaw.
6. Check for breathing
a) After opening the airway, check quickly for breathing for no more than
10 seconds. Put your cheek down by the mouth and nose area of the
injured or ill person, look at his/her chest and abdomen, and check the following three points.
• Look to see if the chest and abdomen are rising and falling.
• Listen for breathing.
• Feel for breath against your cheek.
Are you OK?
Please call an
ambulance.
Please bring an AED.

vii
b) If the injured or ill person is breathing, place him/her in the recovery
position and wait for the arrival of the emergency services.
• Position the injured or ill person on his/her side, maintain a clear
and open airway by pushing the head backward while positioning
their mouth downward. To maintain proper blood circulation, roll
him/her gently to position them in the recovery position in the
opposite direction every 30 minutes.
7. Give 2 rescue breaths (omittable)
a) If opening the airway does not cause the injured or ill person to begin
to breathe normally, give rescue breaths.
b) If there is a fear of infection because the injured or ill person has an
intraoral injury, you are hesitant about giving mouth-to-mouth
resuscitation, or getting and preparing the mouthpiece for rescue
breathing takes too long, omit rescue breathing and perform chest
compressions.
c) When performing rescue breathing, it is recommended to use a
mouthpiece for rescue breathing and other protective devices to
prevent infections.
d) While maintaining an open airway, pinch the person's nose shut with
your thumb and forefinger of the hand used to push down the
forehead.
e) Open your mouth widely to completely cover the mouth of the injured or ill person so that no air
will escape. Give rescue breathing twice in about 1 second and check if the chest rises.
8. Cardiopulmonary resuscitation (CPR) (combination of chest compressions and
rescue breaths)
a) Chest compressions
1) Position of chest compressions
• Position the heel of one hand in the centre of the chest, approximately between the
nipples, and place your other hand on top of the one that is in position.
Roll gently in the opposite
direction every 30 minutes.
CPR mask
Mouthpiece for rescue

viii
2) Perform chest compressions
• Perform uninterrupted chest compressions of
30 at the rate of about 100 times per minute.
While locking your elbows positioning yourself
vertically above your hands.
• With each compression, depress the chest wall to a depth of approximately 4 to 5 cm.
b) Combination of 30 chest compressions and 2 rescue breaths
1) After performing 30 chest compressions, give 2 rescue
breaths. If rescue breathing is omitted, perform only chest
compressions.
2) Continuously perform the combination of 30 chest
compressions and 2 rescue breaths without interruption.
3) If there are two or more first-aiders, alternate with each other
approximately every two minutes (five cycles of compressions
and ventilations at a ratio of 30:2) without interruption.
9. When to stop cardiopulmonary resuscitation (CPR)
a) When the injured or ill person has been handed over to the
emergency services
b) When the injured or ill person has started moaning or breathing
normally, lay him/her on his/her side in a recovery position and wait
for the arrival of emergency services.
10. Arrival and preparation of an AED
a) Place the AED at an easy-to-use position. If
there are multiple first-aiders, continue CPR
until the AED becomes ready.
b) Turn on the power to the AED unit.
Depending on the model of the AED, you
may have to push the power on button, or the AED automatically turns on when you open the
cover.
c) Follow the voice prompts of the AED.
11. Attach the electrode pads to the injured or ill person's bare chest
a) Remove all clothing from the chest, abdomen, and arms.
b) Open the package of electrode pads, peel the pads off and securely
place them on the chest of the injured or ill person, with the adhesive
side facing the chest. If the pads are not securely attached to the chest,
the AED may not function. Paste the pads exactly at the positions
30 times
Compress
with these
parts (the
heels of
both
hands).
2 times
Turn on the power.

ix
indicated on the pads, If the chest is wet with water, wipe dry with a dry
towel and the like, and then paste the pads. If there is a pacemaker or
implantable cardioverter defibrillator (ICD), paste the pads at least 3cm
away from them. If a medical patch or plaster is present, peel it off and
then paste the pads. If the injured or ill person's chest hair is thick,
paste the pads on the chest hair once, peel them off to remove the
chest hair, and then paste new pads.
c) Some AED models require to connect a connector by following voice prompts.
d) The electrode pads for small children should not be used for children over the age of 8 and for
adults.
12. Electrocardiogram analysis
a) The AED automatically analyses electrocardiograms. Follow the
voice prompts of the AED and ensure that nobody is touching the
injured or ill person while you are operating the AED.
b) On some AED models, you may need to push a button to analyse
the heart rhythm.
13. Electric shock (defibrillation)
a) If the AED determines that electric shock is needed, the voice
prompt saying, "Shock is needed" is issued and charging starts
automatically.
b) When charging is completed, the voice prompt saying, "Press the
shock button" is issued and the shock button flashes.
c) The first-aider must get away from the injured or ill person, make
sure that no one is touching him/her, and then press the shock button.
d) When electric shock is delivered, the body of the injured or ill person may jerk.
14. Resume cardiopulmonary resuscitation (CPR).
Resume CPR consisting of 30 chest compressions
and 2 rescue breaths by following the voice
prompts of the AED.
15. Automatic electrocardiogram analysis
a) When 2 minutes have elapsed since you resumed cardiopulmonary resuscitation (CPR), the
AED automatically analyses the electrocardiogram.
b) If you suspended CPR by following voice prompts and AED voice prompt informs you that
shock is needed, give electric shock again by following the voice prompts.
If AED voice prompt informs you that no shock is needed, immediately resume CPR.
Press the shock button.

x
16. When to stop CPR (Keep the electrode pads on.)
a) When the injured or ill person has been handed over to the emergency services
b) When the injured or ill person has started moaning or breathing normally, lay him/her on
his/her side in a recovery position and wait for the arrival of emergency services.

xi
Pictorial Indication 
Meanings of Pictorial Indication
Various pictorial indications are included in this manual and
are shown on this equipment so that you can operate them
safely and correctly and prevent any danger to you and / or
to other persons and any damage to your property during
operation. Such indications and their meanings are as
follows.
Please understand them before you read this manual:
DANGER This indication is shown where incorrect equipment
operation due to negligence may cause death or serious
injuries.
WARNING
This indication is shown where any person is supposed to
be in danger of being killed or seriously injured if this
indication is neglected and this equipment is not operated
correctly.
CAUTION
This indication is shown where any person is supposed to
be injured or any property damage is supposed to occur if
this indication is neglected and this equipment is not
operated correctly.
Examples of Pictorial Indication
Electric Shock
The mark represents CAUTION (including DANGER and
WARNING).
Detailed contents of CAUTION ("Electric Shock" in the example
on the left) is shown in the mark.
Disassembling
Prohibited
The mark represents prohibition.
Detailed contents of the prohibited action ("Disassembling
Prohibited" in the example on the left) is shown in the mark.
Disconnect
the power plug
!
The mark represents instruction.
Detailed contents of the instruction ("Disconnect the power plug"
in the example on the left) is shown in the mark.
Warning Label
There is a warning label on the top cover of the equipment.
Do not try to remove, break or modify the label.
!
!
!

xii
Precautions upon Equipment Operation 
DANGER
Never attempt to check or repair the inside of the equipment.
Checking or repair by an unqualified person may cause a fire or an electric
shock.
Contact our head office, or a nearby branch or local office to request
servicing.
Never remove the cover of this equipment.
Touching the high-voltage section inside will cause an electric shock.
Do not attempt to disassemble or tamper with this equipment.
Otherwise, a fire, an electric shock, or a malfunction may occur.
When conducting maintenance, make sure to turn the main power off.
Failure may result in electric shock.
Turn off all the main powers before cleaning the equipment. Make sure to turn
it off since voltage is still outputted from the rectifier even after the indicator
and the radar are turned off. Failure may result in equipment failure, or death
or serious injury due to electric shock.

xiii
When turning off the power supply, do not hold down the power button of the
operation unit.
Otherwise, a trouble may occur due to termination failure.
When conducting maintenance work, make sure to turn off the power so that
the power supply to the equipment is completely cut off.
Some equipment components can carry electrical current even after the
power switch is turned off, and conducting maintenance work may result in
electric shock, equipment failure, or accidents.
When cleaning the display screen, do not wipe it too strongly with a dry cloth.
Also, do not use gasoline or thinner to clean the screen. Failure will result in
damage to the screen surface.
Confirm computer virus does not exist in USB flash memory beforehand
when reading and writing of the file by using USB flash memory.
Influences other equipment when the display unit is infected with the virus,
and it may cause a breakdown.
Do not remove USB flash memory while the access lamp (in USB flash drive)
is flashing.
Data may be damaged when the USB flash memory is inserted or removed
while accessing it, and it may cause a breakdown.
Confirm computer virus does not exist in external storage media beforehand when
reading and writing of the file by using external storage media.
Influences other equipment when the display unit is infected with the virus, and it may
cause a breakdown.
In case water or a metal object gets inside the equipment, turn off the power
immediately, unplug the power supply cable from an electric outlet, and
contact our head office, or a nearby branch or local office to request servicing.
Keeping the equipment in operation under such condition may cause a fire,
an electric shock or a malfunction.
In case you find smoke, unusual odor or extreme high heat coming from the
equipment, turn off the power immediately, unplug the power supply cable
from an electric outlet, and contact our head office, or a nearby branch or
local office to request servicing.
Keeping the equipment in operation under such condition may cause a fire or
an electric shock.

xiv
Do not use the offset function during navigation.
If the equipment is used with the offset value entered as the own ship position
(deviated from the actual position), accidents may result.
Change of the colour
of the Day/Night button, particularly the use of the
[Night] colour, may interfere with the recognition of display information.
Confirm display information can be recognised.
Do not turn off the power during Backup/Restore.
Otherwise, a function may fail, and an accident may occur.
Do not turn off the power supply during recovery of C drive image.
Otherwise, a function fault occurs, causing an accident.
The reference target function is to be used if the own ship's speed cannot be
displayed normally due to trouble such as a speed sensor malfunction. Do not
use the reference target function except in emergencies.
Do not set as a reference target a large radar echo such as a land target. The
vectors of the speed and other tracking targets will not be displayed correctly
and may cause an accident.
Do not set as a reference target a sailing ship. The vectors of the speed and
other tracking targets will not be displayed correctly and may cause an
accident.
Do not use own speed based on reference target tracking for relative speed
and CPA/TCPA calculation of AIS targets because the response of own speed
is slower than actual own ship's speed change and it may cause a big error
on the collision judgement of AIS targets.

xv
Do not use or leave the equipment under direct sunlight for a long time or in
the temperatures above 55°C.
Otherwise, a fire or a malfunction may occur.
Do not place a glass or cup containing water, etc., or a small metal object on
this equipment.
If water or such object gets inside, a fire, an electric shock, or a malfunction
may occur.
Do not touch the equipment with hands or gloves wet with water.
Otherwise, an electric shock or a malfunction may occur.
• Do not place any object on the operation panel.
In particular, if a hot object is placed on the operation panel, it can cause
deformation of the surface of the operation panel.
• Do not apply any undue shock on the operation panel, trackball and dials.
Otherwise, a malfunction may result.
Make sure that the main power is turned off before inspection or replacement
of parts.
Otherwise, an electric shock, a fire, or a malfunction may occur.
Information is displayed in addition to a warning or a caution in the alert status
area.
Information is used to report operation errors and so on to the users.
Unlike other alerts, no detail display is provided for Information.

xvi
Glossary
AIO : Admiralty Information Overlay published by United Kingdom
Hydrographic Office (UKHO).
AIS : Automatic Identification System
AZ : Acquisition/Activation zone
Anti-clutter rain : Rain/snow clutter suppression
Anti-clutter sea : Sea clutter suppression
AZI : AZImuth stabilisation mode
BCR/BCT : Bow Crossing Range/Bow Crossing Time
Chart Maintenance : Software to manage the charts. Imports and updates the charts.
C-MAP MAX*1: Digital chart data by C-MAP
CTS : Course To Steer. Heading command.
COG : Course Over the Ground
C UP : Course up. Own ship’s course is pointed to the top centre of the radar
display.
CCRP : Consistent Common Reference Point. The own ship position, to which
all horizontal measurements such as target range, bearing, relative
course, relative speed, CPA or TCPA are referenced, typically the
conning position of the bridge.
CORREL : CORRELation
CPA/TCPA : Distance to the Closest Point of Approach/Time to the Closest Point of
Approach.
CTW : Course Through Water. The direction of the ship's movement through
the water
DIST : Distance
DNV : Det Norske Veritas
DRIFT : The current velocity for manual correction or the current speed on the
horizontal axis of the 2-axis log is displayed.
EBL : Electronic Bearing Line
ETA : Estimated Time of Arrival
ENH : Enhance
GPS : Global Positioning System
HDG : Heading. Ship’s heading
HL : Heading Line
HSC : High Speed Craft. Vessels which comply with the definition in SOLAS
for high speed craft
H UP : Head up. Own ship’s heading line is always pointed to the top centre
of the radar display.
IHO : International Hydrographic Office
IMO : International Maritime Organisation
IR : Radar Interference Rejecter
ISW : InterSWitch unit
LMT : Local Mean Time
LON : Longitude
LAT : Latitude

xvii
LP : Long Pulse
MED : Marine Equipment Directive. Request standard for standardisation of
marine equipment within the EU region
MFD : The formal name is Multi Function Display. The navigation support
functions such as RADAR, ECDIS, CID, and AMS can be executed by
switching.
MMSI : Maritime Mobile Service Identity
MOB : Man Over Board
MON : Performance MONitor
MP : Medium Pulse
newpec : Electronic navigational chart by Japan Hydrographic Association
NM : Nautical Mile 1 nm=1852 m
N UP : The north is always pointed to the top centre of the radar display.
(North up)
P0N : Unmodulated pulse, which is a type of transmission radio wave. While
it is a type of radio wave usually used by radars equipped with
magnetrons, radio waves with a short pulse length are used also by
solid-state radars for short-range detection.
PI : Parallel Index line
Past positions : Equally time-spaced past position marks of a tracked or AIS target and
the own ship.
POSN : POSitioN
PRF : Pulse Repetition Frequency. The number of radar pulses transmitted
each second.
PROC : PROCess. Radar signal processing function
Q0N : A type of radio wave with intra-pulse frequency modulation. It is used
for solid-state pulse compression radars.
RL : Rhumb Line
RR : Range Rings
Relative vector : A predicted movement of a target relative to own ship’s motion
RM : Relative Motion. A display on which the position of own ship remains
fixed, and all targets move relative to own ship.
RM(R) : Relative Motion. Relative Trails
RM(T) : Relative Motion. True Trails
ROT : Rate Of Turn. Change of heading per time unit
Route : A set of waypoints
RPU : RADAR Processing Unit
SOG : Speed Over the Ground
SART : Search And Rescue Transponder
SET : The current direction for manual correction or the current speed on the
horizontal axis of the 2-axis log is displayed.
SLC : Serial LAN Interface Circuit
SP : Short Pulse
STAB : STABilisation
STW : Speed Through Water
TCPA : Time to Closest Point of Approach to own ship

xviii
TM : True Motion. A display across which the own ship and targets move
with their own true motions.
To W PT : To Waypoint (To WPT)
Trails : Tracks displayed by the radar echoes of targets in the form of an
afterglow
Trial manoeuvre : A graphical simulation facility used to assist the operator to perform a
proposed manoeuvre for navigation and collision avoidance purposes
True vector : A vector representing the predicted true motion of a target, as a result
of input of the course and speed of the own ship
TT : Target Tracking
TTG : Time To Go. Time to next waypoint.
TXRX : Transmitter-Receiver Unit
UTC : Universal Time, Coordinated
VRM : Variable Range Marker
VDR : Voyage Data Recorder
WOL : Wheel Over Line
WPT : Waypoint
XTD : Cross Track Distance
XTL : Cross Track Limit
Activated target : A target representing the automatic or manual activation of a sleeping
AIS target for the display of additional information
Associated target : A target simultaneously representing a tracked target and a AIS target
which are decided as the same
Chirp : A type of transmission waveform with intra-pulse frequency
modulation used by solid-state radars. Its radio wave type is classified
as Q0N.
Clutter : Unwanted reflections on a radar screen, from sea surface, rain or
snow.
Display : Screen displayed on the LCD
Frequency deviation range : The range of variation of the Q0N frequency used for transmission
waves of a solid-state radar. Generally, the greater the frequency
deviation range, the higher the resolution in the range direction.
Interswitch Unit : A device to switch over two or more radar display units and two or
more radar antennas
Leg : Line between two consecutive waypoints
Lost AIS target : A target symbol representing the last valid position of an AIS target
before the reception of its data was lost, or its last dead-reckoned
position.
Lost tracked target : One for which target information is no longer available due to poor, lost
or obscured signals.
Power amplifier : A radio frequency amplifier circuit consisting of semiconductor
elements used for solid-state radars. It employs a high frequency, high
power FET.
Primary : Main positioning sensor