JRC JMA-3400 Series User manual

JMAJMA-3400Series3400Series
MARINE RADARMARINE RADAR
EQUIPMENTEQUIPMENT
INSTRUCTIONINSTRUCTION
MANUALMANUAL
ISO 9001, ISO 14001 Certified
APR. 2020 Edition 2CODE No.7ZPRD1007
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

PRECAUTIONS BEFORE OPERATION
i
PRECAUTIONS BEFORE OPERATION
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
ofElectricShock
 
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.
Breathing may stop if current flows through the respiration center 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. It is necessary to perform first aid immediately.
7ZPRD1007

FIRST-AID TREATMENTS
ii
FIRST-AID TREATMENTS
Method of First-Aid Treatment
Precautions for First-Aid Treatments
Apply artificial respiration to the person who collapsed, minimizing moving as much as
possible avoiding risks. Once started, artificial respiration should be continued rhythmically.
(1) Refrain from touching the patient carelessly as a result of 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.

FIRST-AID TREATMENTS
iii
 Treatment to Give When the Patient Has a
Pulse Beating but Has Ceased to Breathe
Performing mouth-to-mouth artificial respiration - Fig. 1
(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. Give rescue breathing twice in
about 1 second and check if the chest rises. (always with the patient's nostrils
closed).
(4) Immediately, perform chest compressions.(perform uninterrupted chest
compressions of 30 at the rate of about 100 times per minute. With each
compression, depress the chest wall to a depth of approximately 4 to 5 cm.)
Rapidly, give 2 rescue breaths. Continuously perform the combination of 30 chest
compressions and 2 rescue breaths without interruption. (Perform the cardiac
massage and mouth-to-mouth respiration)
(5) Continue
the cardiac massage and mouth-to-mouth respiration until natural
respiration is restored.
(6) 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.
(7) 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.o[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 noseo[2].
Alternatively, hold the patient's nose
with your finger to prevent air leak
o[3].
[3]
(3) Blowing air into the patient's lungs.
Blow air into the patient's lungs until
chest is seen to rise. (always with
the patient's nostrils closed) Give
rescue breathing twice in about 1
second and check if the chest rises.
Fig. 1 Mouth-to-mouth artificial respiration

FIRST-AID TREATMENTS
iv
 Treatment to Give When the Patient Has No
Pulse Beating and Has Ceased to Breathe
Performing cardiac massage - Fig. 2
If the patient has no pulse beating, with the pupils open and no heartbeat being heard, the
patient has a cardiac arrest and requires immediate artificial respiration. Continue this until
a medical specialist arrives, and follow his or her directions after that.
(1) Putting one hand on about the lower one third of the patient's ribs and the other hand
over the back of the first, with your elbow fully stretched (with bended elbow, you can’t
press to the extent the patient’s ribs are depressed), apply your body weight to the
hands to press the patient's body until it is depress the chest wall to a depth of
approximately 4 to 5 cm. (Chest compressions of 30 at the rate of about 100 times
per minute.). (Cardiac massage)
(2) If only one first-aider is available, perform a cardiac massage about 30 times and then
give mouth-to-mouth artificial respiration 2 times. Repeat this sequence.
If two first-aiders are available, while one person performs a cardiac massage 30
times, the other should give mouth-to-mouth artificial respiration 2 times. Repeat this
sequence. (Combined cardiac massage and mouth-to-mouth artificial respiration
method)
(3) Check the patient's pupils and feel the pulse from time to time. When the pupils are
restored to normal and the pulse begins to beat regularly, stop treating and keep the
patient calm while giving him or her coffee, tea or any other hot drink to keep him or
her warm while watching him or her carefully.
Fig. 2 Cardiac massage
Procedure for Cardiopulmonary Resuscitation (CPR) Using the AED
[2]
[4]
[3]
[1]

FIRST-AID TREATMENTS
v
(Automated External Defibrillator)

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.
Call an ambulance ( 911,119,112,999 etc)
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; omit table Note (
1
).
Give CPR.
30 chest compressions
Give 2 rescue breaths; omit table 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
The AED
automatically
analyzes the
heart rhythm
every 2 min.

FIRST-AID TREATMENTS
vi
Procedure for Cardiopulmonary Resuscitation (CPR) Using the AED
(Automated External Defibrillator)
1
䠊
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
䠊
Check for responsiveness
a) Tap the shoulder of the injured or ill and shout in the ear saying, "Are you OK?"
b) It 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
䠊
If responding
a) Give first-aid treatment.
4
䠊
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. (Call 911,119,112,999 etc. by local
number)
• Please bring an AED.
• If there is nobody to help, call an ambulance by yourself.
5
䠊
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
䠊
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.
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.
Please
bring an AED.
Please call
an ambulance
Roll gently in the opposite
direction every 30 minutes.
Are you OK?

FIRST-AID TREATMENTS
vii
7
䠊
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
䠊
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 center of the chest, approximately between the nipples,
and place your other hand on top of the one that is in position.
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.
CPR mask
Compress
with these
parts
(the heels of
both hands).
30 times
2 times
Mouthpiece for
rescue breathing

FIRST-AID TREATMENTS
viii
9
䠊
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
䠊
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 theAED.
11
䠊
Attach the electrode pads to the injured or ill person's bare chest
a) Remove all clothing from the chest, abdomen, and arms (male or female).
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 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) SomeAED models require to connect a connector by following voice
prompts.
d) Do not put child pads on adults (older than 8 years).
12
䠊
Electrocardiogram analysis
a) The AED automatically analyzes 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 analyze
the heart rhythm.
13
䠊
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, "Push 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.
Turn on the power.
Press the shock button.

FIRST-AID TREATMENTS
ix
14
䠊
Resume cardiopulmonary resuscitation (CPR)
Resume CPR consisting of 30 chest compressions and 2 rescue
breaths by following the voice prompts of theAED.
15
䠊
Automatic electrocardiogram analysis
a) When 2 minutes have elapsed since you resumed cardiopulmonary resuscitation (CPR), the
AED automatically analyzes 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.
16
䠊
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.

PREFACE & CHECKING THE SUPPLIED ITEMS
x
PREFACE
Thank you very much for purchasing the JRC marine radar equipment, JMA-3400 series.
This equipment is a marine radar equipment designed to obtain safe operation of marine ships.
This equipment consists of a scanner unit and a display unit as its main units.
zBefore operating the equipment, be sure to read this instruction manual carefully for correct
operation.
zMaintain this instruction manual so that operators can refer to it at anytime.
Refer to this manual when any inconvenience or defect occurs.
About equipment type names:
JMA-3400 is a radar series model name.
Individual name is changed according with the combination of units.
JMA-3400 Series
JMA-3404 Display Unit NCD-2364 + Scanner Unit NKE-2043
JMA-3406 Display Unit NCD-2364 + Scanner Unit NKE-2063A/AHS
JMA-3411-4 Display Unit NCD-2364 + Scanner Unit NKE-2103-4/4HS
JMA-3411-6 Display Unit NCD-2364 + Scanner Unit NKE-2103-6/6HS
CHECKING THE SUPPLIED ITEMS
STANDARD SUPPLY ITEMS
Standard supply items are as follows.
Optional special length cables are prepared by JRC if request.
Option cable is provided with a length of 5m, 10m, 15m, 20m, or 30m. (Please order it if
necessary)
SCANNER UNIT 1 set / DISPLAY UNIT 1 set
POWER CABLE (DC input cable 3m) 1 Piece
INSTRUCTION MANUAL 1 Piece (This book)
NOTE:
This radar display is possible to use AIS, TT, LL_ position, Depth, and N-UP functions.
But those all functions need the signal input from GPS, AIS, GYRO, LOG, ECHO SOUNDERS.
ALL external signals are connected using NMEA cable. This cable is sold separately as an
optional accessory, it is not included in the standard supply items.
OPTION UNITS (Not included in standard supplied items)
Please order to JRC agent or factory if necessary.
ყ
SCANNER to DISPLAY Cable: 5m, 10m, 15m, 20m, 30m
ყ
NMEA Signal connection cable: GPS, NMEA0183, CAN
ყ
Rubber cap for SCANNER to DISPLAY Cable

BEFORE OPERATION
xi
BEFORE OPERATION
PICTORIAL INDICATION
Various pictorial indications are included in this manual and are shown on these equipment so
that you can operate them safety 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.
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 these
equipment are 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
these equipment are not operated correctly.
EXAMPLES OF PICTORIAL INDICATION
Electric
Shock
The Umark 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
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

Instruction
The zmark represents instruction.
Detailed contents of the instruction ("Disconnect the power
plug" in the example on the left) is shown in the mark.




BEFORE OPERATION
xii
RUSSIA CTP MARK
According to the requirements of clause 20 of Technical Regulations about safety of Maritime
transport objects, approved by Resolution of the Russian Federation Government #620 dated
August 12, 2010 and requirements Technical Regulation of the Russian Federation Government
#623 dated August 12, 2010 navigation & radiotelephone equipment should be marked by
company – manufacturer with market-circulation mark the way it is determined by Legislation of
the Russia federation on technical regulation.
According to the article 27 PZ No184 –FZ of Federal Law about Technical Regulation dated
December 12, 2002 and Resolution of the Russian Federation Government dated 19.11.03
No0696 navigation equipment has an appropriate marking. The marking can be performed by
one of four variants, depending on surface colour of equipment.
The images should be grey scale and should contrast against the surface colour (ref. to the
Resolution of the Russian Federation Government No696 <<About market circulation mark>>
dated November 19, 2003).
The marking of Radio and navigation equipment should be done by the manufacturer (supplier)
according to the clause 2 of the article 27 of the Federal Law No.184 –FZ << About technical
Regulation>> and should be applied right to device surface.
Type 1
Type 2
Type 3 Type 4

BEFORE OPERATION
xiii
WARNING STATEMENTS FOR INDUSTRY CANADA
ENGLISH:
This device complies with Industry Canada license-exempt RSS standard(s).
Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept
any interference, including interference that may cause undesired operation
of the device.
FRANÇAIS:
Le présent appareil est conforme aux CNR d'Industrie Canada applicables
aux appareils radio exempts de licence. L'exploitation est autorisée aux deux
conditions suivantes:
(1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil
doit accepter tout brouillage radioélectrique subi, même si le brouillage est
susceptible d'en compromettre le fonctionnement.
Microwave radiation level:
Keep away from a scanner when it is transmitting.
The high level of microwave is radiated from the front face of the
scanner specified below. The microwave exposure at close range
could result in injuries (especially of the eyes).
Information:
Item under test 50W/m210W/m22.5W/m2
NKE-2043 NA 40cm NA
NKE-2063A NA 22cm NA
NKE-2103-4 NA 26cm 123cm
NKE-2103-6 NA 26cm 123cm
https://www.canada.ca/en/health-canada/services/publications/health-
risks-safety/limits-human-exposure-radiofrequency-electromagnetic-
energy-range-3-300.html#s2

BEFORE OPERATION
xiv
FRANÇAIS:
Micro-ondes niveau de rayonnement:
Tenir à l'écart à partir d'un scanner lorsqu'il transmet.
Le niveau élevé de micro-onde est rayonnée à partir de la face avant de
l'analyseur décrit ci-dessous. L'exposition aux micro-ondes à courte portée peut
entraîner des blessures (notamment des yeux).
Information:
Article en cours
de test 50W/m210W/m22.5W/m2
NKE-2043 NA 40cm NA
NKE-2063A NA 22cm NA
NKE-2103-4 NA 26cm 123cm
NKE-2103-6 NA 26cm 123cm
https://www.canada.ca/en/health-canada/services/publications/health-
risks-safety/limits-human-exposure-radiofrequency-electromagnetic-
energy-range-3-300.html#s2

PRECAUTIONS
xv
PRECAUTIONS
DANGER
Never carry out internal inspection or repair work of the equipment by users.
Inspection or repair work by unauthorized personnel may result in fire hazard
or electric shock.
For inspection and repair work of equipment components, consult with our
branch office, branch shop, sales office, or our distributor in your district.
When conducting maintenance, make sure to turn the main power off.
Failure to comply may result in electrocution.
Turn off the main power before cleaning the equipment. Especially
when a rectifier is used, make sure to turn it off since voltage is still output
from the rectifier even after the radar is turned off.
Failure to comply may result in equipment failure, electric shock or serious
injury.
When conducting maintenance work on the antenna, make sure to
turn its main power off.
Failure to comply may result in electrocution or injuries.

PRECAUTIONS
xvi
Never directly touch the internal components of the antenna,
receiver/transceiver, or indicator.
Direct contact with these high voltage components may cause electrocution.
For maintenance, inspection, or adjustment of equipment components,
consult with our branch office, branch shop, sales office, or our distributor
in your district.
Microwave radiation level:
Keep away from a scanner when it is transmitting.
The high level of microwave is radiated from the front face of the
scanner specified below. The microwave exposure at close range
could result in injuries (especially of the eyes).
Item under test 50W/m210W/m22.5W/m2
NKE-2043 NA 40cm NA
NKE-2063A NA 22cm NA
NKE-2103-4 NA 26cm 123cm
NKE-2103-6 NA 26cm 123cm
Make sure to install the antenna at a place higher than human height.
Direct exposure to electromagnetic waves at close range will have adverse
effects on the human body.
Direct exposure to electromagnetic waves at close range will have adverse
effects on the human body. When it is necessary to get close to the antenna
for maintenance or inspection purposes, make sure to turn the indicator
power switch to "OFF" or "STBY."
When conducting maintenance work, make sure to turn off the power and
unplug the power connector J1 of the display unit 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 without
unplugging the power connector may result in electrocution, equipment
failure, or accidents.
Do not take apart, and do not remodel the display unit. This could cause water
to seep inside the display unit.

PRECAUTIONS
xvii
A malfunction may occur if the power in the ship is instantaneously
interrupted during operation of the radar. In this case, the power should be
turned on again.
Always use the automatic tuning mode.
Use the manual tuning mode only when the automatic tuning mode does not
provide the best tuning state due to deterioration of magnetron for example.
If sensitivity is set too high, unnecessary signals such as noises in the
receiver and false echoes increase to lower target visibility.
At the same time, if sensitivity is set too low, detection of targets such as
ships and dangerous objects may be hindered.
Therefore, sensitivity must always be set to an optimal level.
When using the sea clutter suppression function, never set the suppression
level too high canceling out all image noises from the sea surface at close
range. Detection of not only echoes from waves but also targets such as
other ships or dangerous objects will become inhibited.
When using the sea clutter suppression function, make sure to choose the
most appropriate image noise suppression level.
When using the rain/snow reflection suppression function, never set the
suppression level too high canceling out all image noises from the rain or
snow. Detection of not only echoes from the rain or snow but also targets
such as other ships or dangerous objects will become inhibited.
When using the rain/snow reflection suppression function, make sure to
choose the most appropriate image noise suppression level.
Use the radar only as a navigation aid.
The final navigation decision must always be made by the operator
him/herself.
Making the final navigation decision based only on the radar display may
cause accidents such as collisions or running aground.
Use the target tracking function (TT) only as a navigation aid.
The final navigation decision must always be made by the operator
him/herself.
Making the final navigation decision based only on the target tracking
function (TT) information may cause accidents.
The target tracking function (TT) information such as vector, target numerical
data, and alarms may contain some errors. Also, targets that are notdetected
by the radar cannot be acquired or tracked.
Making the final navigation decision based only on the radar display may
cause accidents such as collisions or running aground.
When a large value is set as an association condition, a tracked target near
an AIS target is identified as the AIS target and may thus disappear from the
display.
For example, when a pilot vessel equipped with the AIS function (a small
target which is not a tracked target) goes near a cargo vessel which is a
tracked target without the AIS function, the tracked target symbol for the
cargo vessel may disappear.

PRECAUTIONS
xviii
Since these alarms may include some errors depending on the target
tracking conditions, the navigation officer himself should make the final
decision for ship operations such as collision avoidance.
Making the final navigation decision based only on the alarm may cause
accidents such as collisions.
When setting an automatic acquisition zone, make sure to properly adjust
gain, sea-surface reflection suppression level, and rain/snow reflection
suppression level so that the optimal target images are always on the radar
screen. The automatic acquisition zone alarm will not be activated for targets
undetected by the radar, and it may result in accidents such as collisions.
Any adjustments must be made by specialized service personnel.
Incorrect settings may result in unstable operation.
Do not make any adjustments during navigation. Failure to comply may
result in adverse effects on the radar function which may lead to accidents
or equipment failure.
Any adjustments must be made by specialized service personnel.
Failure to comply may result in accidents or equipment failure.
Make sure to shut off the main power before replacing parts.
Failure to comply may result in electrocution or equipment failure.
When replacing magnetrons, make sure to shut off the main power and let
the equipment stand for more than 5 minutes to discharge the high-voltage
circuit.
Failure to comply may result in electrocution.
Make sure to take off your watch when your hand must get close to
the magnetron. Failure to comply may result in damage to the watch since
the magnetron is a strong magnet.
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 to comply will result in damage to the screen surface.
Do not take apart, and do not remodel the display unit. It may cause a fire,
the electric shock, and the breakdown.
Before using a USB memory to read or write files, make sure that there are
no computer viruses in the USB memory. If the display unit is infected with a
virus, it may affect other equipment and cause a failure.
When removing the USB memory, check the USB memory access lamp to
make sure that the USB memory is not being accessed before removing it.
If you insert or remove the USB memory during access, the data may be
damaged and a failure may occur.