Furuno BBDS1 User manual

Bottom Discrimination Sounder
BBDS1
OPERATOR'S MANUAL
www.furuno.co.jp
MODEL

i
IMPORTANT NOTICES
General
• The operator of this equipment must read and follow the descriptions in this manual. Wrong op-
eration or maintenance can cancel the warranty or cause injury.
• Do not copy any part of this manual without written permission from FURUNO.
• If this manual is lost or worn, contact your dealer about replacement.
• The contents of this manual and equipment specifications can change without notice.
• The example screens (or illustrations) shown in this manual can be different from the screens
you see on your display. The screens you see depend on your system configuration and equip-
ment settings.
• Save this manual for future reference.
• Any modification of the equipment (including software) by persons not authorized by FURUNO
will cancel the warranty.
• All brand and product names are trademarks, registered trademarks or service marks of their
respective holders.
How to discard this product
Discard this product according to local regulations for the disposal of industrial waste. For disposal
in the USA, see the homepage of the Electronics Industries Alliance (http://www.eiae.org/) for the
correct method of disposal.
How to discard a used battery
Some FURUNO products have a battery(ies). To see if your product has a battery(ies), see the
chapter on Maintenance. Follow the instructions below if a battery(ies) is used.
In the European Union
The crossed-out trash can symbol indicates that all types of batteries
must not be discarded in standard trash, or at a trash site. Take the
used batteries to a battery collection site according to your national
legislation and the Batteries Directive 2006/66/EU.
In the USA
The Mobius loop symbol (three chasing arrows) indicates that Ni-Cd
and lead-acid rechargeable batteries must be recycled. Take the used
batteries to a battery collection site according to local laws.
In the other countries
There are no international standards for the battery recycle symbol. The number of symbols can
increase when the other countries make their own recycle symbols in the future.
Cd
Ni-Cd Pb

ii
SAFETY INSTRUCTIONS
Do not operate the equipment with
wet hands.
Electrical shock can result.
Do not place liquid-filled containers
on the top of the equipment.
Electrical shock can result.
Do not install the equipment
where it may be subjected to rain or
water splash.
Fire or electrical shock can result if water
gets inside the equipment.
Use the proper fuse.
Use of a wrong fuse can damage the
equipment and may cause fire.
WARNING
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
Warning, Caution
Mandatory Action
Prohibitive Action
The user and installer must read the appropriate safety instructions before attempting to install
or operate the equipment.
WARNING
WARNING
Do not open the equipment.
Only qualified personnel should work
inside the equipment.
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury can
result.
Turn off the equipment immediately if
it is emitting smoke or fire.
Fire or electrical shock can result if the
power is left on.
Turn off the power immediately if water
leaks into the equipment or an object
is dropped inside the equipment.
Continued use can cause fire or electrical
shock.
Turn off the power immediately if you
feel the equipment is acting abnormally.
If the equipment is very warm or is
emitting strange noises turn off the
power immediately and contact your
dealer for advice.
WARNING
Safety instructions for the operator
WARNING
To avoid electrical shock,
do not remove cover. No
user-serviceable parts
inside.
Name: Warning Label (1)
Type: 86-003-1011-3
Code No.: 100-236-233-10
A warning label is attached to the equipment.
Do not remove the label. If a label is missing
or illegible, contact a FURUNO agent or dealer
about replacement.

SAFETY INSTRUCTIONS
iii
Standard
compass
Steering
compass
0.30 m 0.30 m
CAUTION
CAUTION
The transducer cable must be handled
carefully, following the guidelines
below.
• Keep fuels and oils away from the
cable.
• Locate the cable away from chemicals.
• Locate the cable away from locations
where it might be damaged.
Do not turn on the power with the
transducer exposed to air.
Damage to the transducer may result.
Observe the following compass safe
distances to prevent interference to a
magnetic compass:
WARNING
WARNING
Do not open the equipment.
Only qualified personnel should work
inside the equipment.
Turn off the power at the main switchboard
before beginning the installation.
Fire or electrical shock can result if the
power is left on.
Confirm that there is no water leakage at
the transducer and temperature
sensor.
Water leakage can sink the vessel. Also,
confirm that neither the transducer or
sensor is loosened by vibration. The
installer is solely responsible for the
installation.
Confirm that the power supply voltage
is within the rating of this equipment.
Incorrect voltage will damage the equip-
ment and may cause fire.
Safety instructions for the installer

iv
TABLE OF CONTENTS
FOREWARD ................................................................................................................v
SYSTEM CONFIGURATION ......................................................................................vi
EQUIPMENT LIST .....................................................................................................vii
1. Mounting...............................................................................................................1
1.1 Bottom Discrimination Sounder.................................................................................1
1.2 Transducer 520-5PSD, 520-5MSD ...........................................................................2
1.2.1 Mounting location...............................................................................................2
1.2.2 Acceptable mounting locations..........................................................................3
1.2.3 Installation Procedure........................................................................................3
1.3 Transducer 525-5PWD (transom mount)..................................................................4
1.3.1 Installation for flat hulls ......................................................................................5
1.3.2 Installation for deep-V hulls ...............................................................................5
1.3.3 Transducer preparation .....................................................................................6
1.4 Optional Water Temperature Sensor ST-02MSB, ST-02PSB...................................6
1.5 Optional Temperature Sensors.................................................................................7
1.5.1 Transom mount temperature sensor T-02MTB .................................................7
1.5.2 Thru-hill temperature sensor T-02MSB, T-03MSB ............................................7
1.6 Optional Triducers.....................................................................................................9
1.6.1 Thru-hull triducer 525STID-MSD .......................................................................9
1.6.2 Transom route triducer 525STID-PWD..............................................................9
2. WIRING ...............................................................................................................14
2.1 Connections ............................................................................................................14
2.2 Optional Temperature/Speed Sensor, Temperature Sensor. .................................15
2.3 Wiring Optional 1 kW Transducer ...........................................................................16
3. INITIAL SETTINGS, OPERATION......................................................................18
3.1 MODE SW...............................................................................................................18
3.2 Operation Check (LED)...........................................................................................19
4. MAINTENANCE..................................................................................................20
4.1 Maintenance............................................................................................................20
4.2 Replacing the fuse ..................................................................................................21
SPECIFICATIONS .................................................................................................SP-1
PACKING LIST........................................................................................................A-1
OUTLINE DRAWINGS.............................................................................................D-1
INTERCONNECTION DIAGRAM ............................................................................S-1

v
FOREWARD
A Word to the Owner of the BBDS1
Congratulations on your choice of the BBSD1 Bottom Discrimination Sounder. We are confident
you will see why the FURUNO name has become synonymous with quality and reliability.
For over 60 years FURUNO Electric Company has enjoyed an enviable reputation for innovative
and dependable marine electronics equipment. This dedication to excellence is furthered by our
extensive global network of agents and dealers.
Your equipment is designed and constructed to meet the rigorous demands of the marine envi-
ronment. However, no machine can perform its intended function unless properly operated and
maintained. Please carefully read and follow the operation and maintenance procedures set forth
in this manual.
Thank you for considering and purchasing FURUNO.
We would appreciate feedback from you, the end-user, about whether we are achieving our pur-
poses.
Features:
The BBDS1 features the following:
• Onboard bottom discrimination capability to assist with fishing.
• Displays fish icons which allow the user to easily discern the actual size of fish (ACCU-FISH).
Caution when operating:
Please keep the following in mind when using the Bottom Discrimination Sounder:
• The BBDS1 is for use with NavNet 3D only.
• Use at a depth of 5 m - 100 m.
• Use a ship speed of 10 kt or less.
• Enter the ship’s draft value via the MFD8/12/BB.
• To show a consistent display of the actual bottom, set the range display of the fish finder screen
to “auto”.

vi
SYSTEM CONFIGURATION
Bottom Discrimination Sounder
BBSD1
12-24 VDC
Transducer
520-5PSD
525-5PWD
520-5MSD
Triducer
525STID-MSD
525STID-PWD
Rectifier
PR-62
100/110/220/230 VAC,
1φ, 50/60 Hz Speed/temperature
sensor
ST-02MSB
ST-02PSB
Temperature
sensor
T-02MTB
T-02MSB
T-03MSB
*: HUB-101 may be connected to 3 sets of MFB8/12/MFDBB
NavNet 3D
NavNet 3D
for
1 kW
transduce
r
Matching Box
MB-1100
Transducer
50/200-1T
50/200-12M
MFD8/12
MFDBB
MFD8/12
MFDBB
MFD8/12
MFDBB
HUB-101
MFD8/12
MFDBB

vii
EQUIPMENT LIST
Standard supply
Optional supply
Name Type Code No. Qty Remarks
Bottom Dis-
crimination
Sounder
BBDS1 - 1
Spare Parts SP02-05201 001-007-860 1 set Fuse
Installation
Materials CP02-08700 000-017-040 1 set See Packing List
Name Type Code No. Remarks
Matching Box MB-1100 000-041-353 For 1 kW
Cable Assy MOD-Z072-020+ 000-167-175-10 2 m LAN cable
MOD-Z072-100+ 000-167-177-10 10 m LAN cable
Triducer 525STID-MSD 000-011-783 Thru-hull mount, metal
525STID-PWD 000-011-784 Transom mount, resin
Transducer 520-5PSD 000-015-204 Thru-hull mount, resin
520-5PWD 000-146-966 Transom mount, resin
520-5MSD 000-015-212 Thru-hull mount, metal
50/200-1T 000-015-170 10 m, 1 kW
50/200-12M 000-015-171 10 m, 1 kW
Speed/
Temperature
sensor
ST-02MSB 000-137-986 Thru-hull mount, metal
ST-02PSB 000-137-987 Thru-hull mount, resin
Temperature
sensor T-02MTB 000-040-026 Transom mount
T-02MSB 000-040-040 Thru-hull mount
T-03MSB 000-040-027 Thru-hull mount
Cable Assy. 02S4147 000-141-082 For Speed/Temp sensor,
Temp. sensor
Rectifier PR-62 000-013-484 100 V AC
000-013-485 110 V AC
000-013-486 220 V AC
000-013-487 230 V AC

1
1. MOUNTING
1.1 Bottom Discrimination Sounder
The Bottom Discrimination Sounder can be installed on a desktop, deck or on a bulkhead. When
selecting a mounting location for the Bottom Discrimination Sounder, keep the following in mind:
• Locate the unit away from areas where rain and splash can occur.
• The temperature and humidity should be moderate and stable.
• Locate the unit away from exhaust pipes and vents.
• Locate the unit where shock and vibration are minimal.
• The mounting location should be well ventilated.
• Keep the unit away from electromagnetic field-generating equipment such as motors and gen-
erators.
• Leave slack in cables for maintenance and servicing ease.
• A magnetic compass will be affected if the unit is placed too close to it. Observe the compass
safe distances noted in the safety instructions to prevent disturbance to the magnetic compass.
• Fasten the Bottom Discrimination Sounder to the mounting location with four self-tapping
screws (4×20, supplied). Fasten as specified by the drawing at the end of this book. If fastening
to an upright wall or bulkhead, mount the unit vertically, not sideways.
CAUTION
CAUTION
Do not apply paint, rust protection, etc, to coated surface parts of the unit.
These may damage the coated surface areas.
Be especially careful not to apply chemicals to the coated connectors.
(0.2”)
(9.0” 0.04”)
(10.0”)
(2.8”) (2.8”)
(2 - 0.2”)
(3.5”)
(1.7”)
(0.5”)
(8.6”)
(3.3”)
(5.7” 0.04”)
(0.1”)

1. MOUNTING
2
1.2 Transducer 520-5PSD, 520-5MSD
1.2.1 Mounting location
The performance of this sounder is directly related to the mounting location of the transducer, es-
pecially for high-speed cruising. The installation should be planned in advance, keeping the stan-
dard cable length and the following factors in mind:
• When the boat has a keel, the transducer should be at least 15-30 cm (5.9” - 11.8”) away from
it. Typical thru-hull mountings are shown in the figure on the next page.
• Air bubbles and turbulence caused by movement of the boat seriously degrade the sounding
capability of the transducer. The transducer should, therefore, be located in a position where
water flow is the smoothest. Noise from the propellers also adversely affects performance and
the transducer should not be mounted nearby. The lifting strakes are notorious for creating
acoustic noise, and these must be avoided by keeping the transducer inboard of them.
• The transducer must always remain submerged, even when the boat is rolling, pitching or up
on a plane at high speed.
• A practical choice would be somewhere between 1/3 and 1/2 of the boat's length from the stern.
For planing hulls, a practical location is generally rather far astern, so that the transducer is al-
ways in water regardless of the planing attitude
Dimensions of transducers 520-5PSD, 520-5MSD
22 mm (0.9”) 24 mm (0.9”)
120 mm (4.7”) 120 mm (4.7”)
68 mm (2.7”)
68 mm (2.7”) 87 mm (3.4”)
30 mm (1.2”) 28 mm (1.1”)
520-5PSD 520-5MSD
Ship’s bow

1. MOUNTING
3
1.2.2 Acceptable mounting locations
Deep V-hull
High speed V-planning hull
1.2.3 Installation Procedure
1. With the boat hauled out of the water, mark the location selected for mounting the transducer
on the bottom of the hull. If the hull is not level within 15 degrees in any direction, fairing blocks
made out of teak should be used between the transducer and hull, both inside and outside, to
keep the transducer face parallel with the water line. Fabricate the fairing block as shown be-
low and make the entire surface as smooth as possible to provide an undisturbed flow of water
around the transducer.
* Position 1/2 to 1/3 length of the hull from stern.
* 15-30 cm from keel line (inside first lifting strakes).
* Within the submerged bottom area
* Deadrise angle within 15°

1. MOUNTING
4
The fairing block should be smaller than the transducer itself to provide a channel to divert
turbulent water around the sides of the transducer rather than over its face.
2. Drill a hole just large enough to pass the threaded stuffing tube of the transducer through the
hull, making sure it is drilled vertically.
3. Apply a sufficient amount of high quality caulking compound to the top surface of the trans-
ducer, around the threads of the stuffing tube and inside the mounting hole (and fairing blocks
if used) to ensure watertight mounting.
4. Mount the transducer and fairing blocks and tighten the locking nuts. Be sure that the trans-
ducer is properly oriented and its working face is parallel to the water line.
Note: Do not over-stress the stuffing tube and locking nuts through excessive tightening, since
the wood block will swell when the boat is placed in the water. It is suggested that the nut be tight-
ened lightly at installation and retightened several days after the boat has been launched.
1.3 Transducer 525-5PWD (transom mount)
This type of mounting is very commonly employed for outboard motor boats. Do not use this meth-
od on an inboard motor boat because turbulence is created by the propeller ahead of the trans-
ducer.
There are two methods of installation: flush with hull (for flat hulls) and projecting from hull (for
deep V-hulls).
Saw along slope of hull
Hole for stuffing tube
Upper half
Lower half
BOW
Flat washer
Rubber
washer
Deep-V Hull
Hull bottom
Fairing block
Flat Hull
Hull bottom

1. MOUNTING
5
1.3.1 Installation for flat hulls
A suitable mounting location is at least 50 cm (20.0”) away from the engine and where the water
flow is smooth.
1. Drill four pilot holes in the mounting location.
2. Attach the transducer to the bracket with self-tapping screws (supplied).
3. Adjust the transducer position so the transducer faces right to the seabed.
Note: If necessary, to improve water flow and minimize air bubbles staying on the transducer
face, incline the transducer about 5 degrees at the rear. This may require a certain amount of
experimentation for fine tuning at high cruising speeds.
4. Fill the gap between the wedge front of the transducer and transom with epoxy material to
eliminate any air spaces, and affix tape as shown.
1.3.2 Installation for deep-V hulls
This method is employed on deep-V hulls and provides good performance because the effects of
air bubbles are minimal. Install the transducer parallel with water surface; not flush with hull. If the
boat is placed on a trailer care must be taken not to damage the transducer when the boat is
hauled out of the water and put on the trailer.
Deep-V Hull
Flat Hull
(20.0”)

cm
M5x20
Tape

1. MOUNTING
6
1.3.3 Transducer preparation
Before putting the boat in water, wipe the face of the transducer thoroughly with a detergent liquid
soap. This will lessen the time necessary for the transducer to have good contact with the water.
Otherwise the time required for complete "saturation" will be longer, and the performance will be
reduced.
Note: Do not paint the transducer surface. Performance will be affected.
1.4 Optional Water Temperature Sensor ST-02MSB,
ST-02PSB
Select a suitable mounting location considering the following points:
• Select a mid-boat flat position. The sensor does not have to be installed perfectly perpendicular.
The sensor must not be damaged in dry-docking operation.
• Select a place apart from equipment generating heat.
• Select a place in the forward direction viewing from the drain hole, to allow for circulation of cool-
ing water.
• Select a place free from vibration.
Procedure
1. Dry-dock the boat.
2. Make a hole of approx. 51 mm (2.0”) in diameter in the mounting location.
3. Unfasten locknut and remove the sensor section.
4. Apply high-grade silicone sealant to the flange of the sensor.
5. Pass the sensor casing through the hole.
6. Face the notch on the sensor casing and tighten the locknut.
7. Set the sensor section to the sensor casing and tighten the locknut.
8. Launch the boat and check for water leakage around the sensor.
M5x14
M5x20
M5x20
No. 2

1. MOUNTING
7
1.5 Optional Temperature Sensors
1.5.1 Transom mount temperature sensor T-02MTB
• Fix the cable at a convenient location with cable clamp.
• When the cable is led in through the transom board, make a hole of approx. 17 mm (0.7”) in
diameter to pass the connector. After passing the cable, fill the hole with a sealing compound.
1.5.2 Thru-hill temperature sensor T-02MSB, T-03MSB
Select a suitable mounting location considering the following points:
• Select a mid-boat flat position. The sensor does not have to be installed perfectly perpendicular.
However, the location should not be such that the transducer may be damaged when the boat
is dry-docked.
• Locate away from equipment which gives off heat.
• Locate away from drain pipes.
• Select a location where vibration is minimal.
123mm (4.8”)
51
Brim
φ77
Locknut
Face “notch”
toward bow.
Flange nut
Coat with
silicone
sealant. (3.0”)
(2.0”)
D
Mount sensor flush with
hull bottom.
M5x20
D>50 cm (20.0”)

1. MOUNTING
8
Sensor Holder
Locknut
Locknut
Washer
Rubber gasket
Locknut
Washer
Rubber gasket
Apply silicone
sealant.
Apply silicone
sealant.
Sensor Cable
T-02MSB T-03MSB
Holder guide
21mm (0.83”)
Less than 25 mm (1.0”)
How to install:
1. Drill a 21 mm (0.83”) hole in the ship’s
bottom.
2. Feed the cable up from under the ship’s
bottom.
3. Insert the cable through the rubber gasket,
washer, and locknut, in that order.
4. Apply high quality silicone sealant to the
the surface of the flange, and affix the
sensor with the locknut (do not exceed a
torque of 59 Nm).
5. After launching the ship, check that the
area is free from water leakage.
How to install:
1. Drill a 25 mm (1.0”) hole in the ship’s bottom.
2. Coat the holder guise with a high quality silicone
sealant, and feed the holder guide up through the
ship’s bottom.
3. Place the the rubber gasket, washer, and locknut,
onto the holder guide (from the top down), in that
order.
4. Place the sensor holder onto the holder guide,
then affix with the nut.
5. After launching the ship, check that the area is free
from water leakage.
φ25mm (1.0”)

1. MOUNTING
9
1.6 Optional Triducers
1.6.1 Thru-hull triducer 525STID-MSD
See section 1.4 for how to install the 525STID-MSD.
1.6.2 Transom route triducer 525STID-PWD
Mounting location
To ensure the best performance, the sensor must be submerged in aeration-free and turbulence-
free water. Mount the sensor close to the centerline of the boat. On slower heavier displacement
hulls, positioning it farther from the centerline is acceptable.
Allow adequate space above the bracket for it to release and rotate the sensor upward.
79 mm
(3.1”)
Thread
133 mm
(5.2”)
51 mm
(2.0”)
7mm (0.3”)
140 mm
(5.5”)
27 mm
(1.1”)
Height to the screw
CAUTION
CAUTION
Do not install the triducer in the following
locations:
Near any water drain or vent
Near overhangs, braces, or behind fixtures
Near any unstable area of the ship’s bottom
Near any areas with peeling paint
Do not install the triducer where it can be a
hindrance during any of the following times:
When pulling a trailer
When launching
When being towed
When ship is in drydock









1. MOUNTING
10
Note 1: Do not mount the sensor in an area of turbulence or bubbles: near water intake or dis-
charge openings; behind strakes, struts, fittings, or hull irregularities; behind eroding paint (an in-
dication of turbulence).
Note 2: Avoid mounting the sensor where the boat may be supported during trailering, launching,
hauling, and storage.
Note 3: For single drive boat, mount on the starboard side at least 75 mm (3.0") beyond the
swing radius of the propeller.
Note 4: For twin drive boat, mount between the drives.
Installation of Bracket
1. Cut out the installation template (enclosed with transducer) along the dotted line.
2. At the selected location, position the template, so the arrow at the bottom is aligned with the
bottom edge of the transom. Being sure the template is parallel to the waterline, tape it in
place.
Warning: Always wear safety goggles and a dust mask.
3. Using a 4 mm, #23, or 9/64" bit, drill three holes 22 mm (0.9”") deep at the locations indicated.
To prevent drilling too deeply, wrap masking tape around the bit 22 mm (0.9") from the point.
Fiberglass hull: Minimize surface cracking by chamfering the gelcoat. If a chamfer bit or
countersink bit is not available, start drilling with a 6mm or 1/4" bit to a depth of 1 mm (0.04")
4. If you know your transom angle, the bracket is designed for a standard 13° transom angle.
11°-18° angle: No shim is required. Skip to step 3 in "Adjusting".
Height without
speed sensor
191 mm (7.5”)
Height with
speed sensor
213 mm (8.4”)
Height
75 mm (3.0”)
minimum beyond
the swing radius
Slope of hull parallel to
waterline.
Deadrise angle
Align template vertically
Align template with the
bottom edge of the

1. MOUNTING
11
Other angles: The shim is required. Skip to step 2 in "Adjusting".
If you do not know the transom angle, temporarily attach the bracket and sensor to the tran-
som to determine if the plastic shim is needed.
5. Using the three #10 x 1-1/4" self-tapping screws, temporarily screw the bracket to the hull. DO
NOT tighten the screws completely at this time. Follow the step 1-4 in "Attaching the sensor
to the bracket", before proceeding with "Adjusting".
Attaching the sensor to the bracket
1. If the retaining cover near the top of the bracket is closed, open it by depressing the latch and
rotating the cover downward.
2. Insert the sensor's pivot arms into the slots near the top of the bracket.
3. Maintain pressure until the pivot arms click into place.
4. Rotate the sensor downward until the bottom snaps into the bracket.
5. Close the retaining cover to prevent the accidental release of the sensor when the boat is un-
derway.
Adjusting
1. Using a straight edge, align the underside of the sensor relative to the underside of the hull.
The stern of the sensor should be 1-3 mm (1/16-1/8") below the bow of the sensor or parallel
to the bottom of the hull.
Note: Do not position the bow of the sensor lower than the stern because aeration will occur.
2. To adjust the sensor's angle relative to the hull, use the tapered plastic shim provided. If the
bracket has been temporarily fastened to the transom, remove it. Key the shim in place on the
back of the bracket.
Latch
Retaining
cover
Step 1 Step 2
Step 3
Step 4
Slot (2)
Pivot
Arm (2)