Dufour CATAMARAN 48 User manual

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DY CAT 48
DESIGN CATEGORY: A
According to European directive 2013/53/UE
USER’S GUIDE

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Index
I. GENERAL SPECIFICATIONS.........................................................................................................6
Design Category............................................................................................................................................. 6
Certification................................................................................................................................................... 7
Hull Identification.......................................................................................................................................... 7
Building Plate................................................................................................................................................. 7
Degree of Danger........................................................................................................................................... 8
II. TECHNICAL SPECIFICATIONS ......................................................................................................9
Technical data................................................................................................................................................ 9
Stability........................................................................................................................................................ 10
III. ELECTRICAL SYSTEM................................................................................................................11
Safety and use instructions for the electrical system.................................................................................. 11
12 V Systems................................................................................................................................................ 11
Batteries ...................................................................................................................................................... 12
Fans.............................................................................................................................................................. 13
220 Volt Plant .............................................................................................................................................. 13
Generator .................................................................................................................................................... 15
IV. GAS SYSTEM ...........................................................................................................................17
Generalities.................................................................................................................................................. 17
Operation of gas system.............................................................................................................................. 18
System Check............................................................................................................................................... 19
Security Warnings........................................................................................................................................ 20
Barbeque ..................................................................................................................................................... 20
V. LIQUID SYSTEMS.....................................................................................................................21
Bilge System................................................................................................................................................. 21
Fresh Water System .................................................................................................................................... 22
Operating WC .............................................................................................................................................. 24
Sea Water System........................................................................................................................................ 26
VI. PREVENT FLOODING ...............................................................................................................27
VII. FIRE FIGHTING SYSTEM ...........................................................................................................28
Safety Advices.............................................................................................................................................. 29
VIII. ENGINE PROPULSION..............................................................................................................30
Starting the engine ..........................................................................................................................31
Wintering........................................................................................................................................33
IX. FUEL SYSTEM..........................................................................................................................34
X. STEERING SYSTEM ..................................................................................................................35

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Manouver Bar.............................................................................................................................................. 35
Emergency Tiller.......................................................................................................................................... 35
XI. NAVIGATION ..........................................................................................................................36
Before leaving the dock............................................................................................................................... 36
XII. PREVENTION OF FALLS AND MEANS OF REBOARDING .............................................................39
XIII. ENVIRONMENTAL PROTECTION AND SECURITY .......................................................................40
XIV. SECURITY WEAPONS............................................................................................................... 40
XV. HANDLING, TRANSPORTATION, DRY SETTING..........................................................................41
XVI. MOORING, ANCHORING AND TOWING....................................................................................41
Anchoring .................................................................................................................................................... 42
Lifting the anchor ........................................................................................................................................ 43
1. General plan ........................................................................................................................................ 45
2. Deck Plan ............................................................................................................................................. 47
3. Fly Plan................................................................................................................................................. 49
4. Sail Plan................................................................................................................................................ 52
5. Plan of halyards and tapping............................................................................................................... 54
6. Plan 220 V............................................................................................................................................ 55
7. Plan of electrical loads and power ...................................................................................................... 60
8. Electric panel 12 V ............................................................................................................................... 63
9. Plan of plugs 12 V ................................................................................................................................ 64
10. Electric plan 12 V ............................................................................................................................. 65
11. Electric plan 220 V ........................................................................................................................... 68
12. Fuse location plan............................................................................................................................ 69
13. Steering system plan ....................................................................................................................... 71
14. Gas plan & Sea water system .......................................................................................................... 73
15. Evacuation plan ............................................................................................................................... 75
16. Fresh water system plan.................................................................................................................. 77
17. Bilge system plan............................................................................................................................. 79
18. Thru-hull fittings plan ...................................................................................................................... 81
19. Mechanical plan............................................................................................................................... 83
20. Fuel plan .......................................................................................................................................... 86
21. Black water plan .............................................................................................................................. 87
22. Navigation lights.............................................................................................................................. 89

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DY CAT 48
INTRODUCTION
DUFOUR CATAMARANS is pleased to present this manual that will allow you to learn more about
your boat. This manual has been developed to help you use your boat safely and with pleasure. It
contains details about the boat, the equipment supplied or installed and its systems, as well as the
information about their use. Read it carefully and familiarize yourself with the boat before using it.
This owner's manual is not a course on the safety of navigation or the marine sense. If this boat is
your first boat or if you have changed it to a type of boat with which you are not familiar, for your
comfort and safety, be sure to gain experience on its manoeuvre and use before taking the
Commands. Your dealer, your national sailing Federation or powerboating or your yacht club will be
happy to inform you about the relevant sailing schools or instructors in the region.
Make sure that the wind and sea conditions are in line with the design category of your boat, and
that you and your crew are able to manoeuvre the boat under these conditions. Even when your
boat is adapted to it, the sea and wind conditions corresponding to the design categories A, B and
C vary from heavy storm for category A to severe conditions for the top of category C, subject to the
dangers of waves or gusts and anomalies, and are therefore dangerous conditions, in which only an
experienced crew, in good shape, and trained, maneuvering a well-maintained boat can navigate
satisfactorily. This owner's manual is not a detailed maintenance or repair guide. In case of difficulty
use the builder of the boat or his representative. If a service manual is provided, use it.
Always use the services of an experienced professional for maintenance, installation of accessories
or modifications. Modifications that may affect the safety characteristics of the vessel shall be
assessed, carried out, and documented by competent persons. The builder of the boat cannot be
held responsible for any changes that he would not have approved. In some countries a driver's
licence or authorisation is required or specific regulations are in force. Always properlymaintain your
boat and consider the deterioration that results from time or, if applicable, significant or improper
use. Any boat, however solid it may be, can be severely damaged if it is not used properly. This is
not compatible with safe navigation. Always adjust the speed and direction of the boat to the sea
conditions.
If your boat is equipped with a life raft, read the user manual carefully. The crew should have on
board all the safety equipment (lifejackets, harness, etc....) corresponding to the type of boat, the
weather conditions, distance from the coast, etc…. This material is mandatory in some countries.
The crew should be familiar with the use of all safety equipment and with emergency safety
manoeuvres (recovery of a man at sea, towing, etc.); sailing schools and clubs regularly organize
training sessions. It is recommended that all persons carry appropriate flotation aids (lifejackets,
personal flotation aid equipment) when they are on deck. It should be noted that in some countries
it is compulsory to wear flotation aid in accordance with national regulations all the time.
WARNING
Before taking the sea, the owner/user of the boat must read this manual and know its
contents, in particular all warnings regarding safe use and emergency procedures. It is
the owner's responsibility to ensure that the boat is equipped with all the safety equipment
required by law during navigation. The owner/user must also inform all other crew
members about the proper use of the boat and the equipment and emergency procedures.

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I. GENERAL SPECIFICATIONS
Design Category
The ship is designed for long journeys during which the wind may exceed force 8 (on the Beaufort
scale) and the waves of significant height of 4 metres, for which these ships are broadly self-
sufficient.
This ability to navigate also depends on the crew's skills, physical abilities, boat maintenance and
armament.
So be very careful before going to sea.
DUFOUR CATAMARANS can not guarantee the perfect working of the ship in exceptional sea
conditions (violent storm, hurricane, cyclone, whirlwind, ...)
REMINDER OF DESIGN CATEGORY
Check the weather before going to sea: take the sea, not the risks!
At the Harbor: The Harbor Master's Office displays daily weather reports and forecasts for the
following days.
Design
Category
Wind Force
(Beaufort)
Vitesse
du vent
Hauteur significative
de vague à
considérer
A
Beyond 8
Up to 28 m/s
Beyond 4 m
B
Up to 8 included
Up to 21m/s
Up to 4 included
C
Up to 6 included
Up to 17 m/s
Up to 2 included
D
Up to 4 included
Up to 13 m/s
Up to 0.5 included

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Certification
DUFOUR CATAMARANS has chosen the Institute for the Certification and Standardization in the
Nautisme as notified body to check the conformity of your boat with the ENAVE –Ente Navale
Europeo S.r.l., according to the module B.
Hull Identification
The hull identification number is located near the shore power connection. It consists of a series of
letters and numbers starting with IT-JJL
Building Plate
Design Category = A
Max number of people :
Category A = 12
Category B = 14
Category C = 20
Category D = 26
WARNING
Do not exceed the maximum number of people recommended. Regardless of the
number of people on board, the total mass of people and equipment must never
exceed the maximum recommended load.
Some of the information is given on the builder's plate
attached to the boat. A full explanation of this
information is given below.
: recommended by the manufacturer when the boat is
sailing in sea conditions corresponding to its design
category.

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Max Load Reccomended :
WARNING
When loading the boat, never exceed the maximum recommended load. Always load the boat
carefully and distribute the loads appropriately tomaintain the theoreticalattitude (approximately
horizontal). Avoid placing heavy loads in the tops.
Degree of Danger
DANGER
Indicates the existence of an extreme intrinsic risk that could give a
high probability of death or irreparable injury if appropriate
precautions are not taken
WARNING
Indicates the existence of a risk of injury or death if proper
precautions are not taken.
ATTENTION
Indicates a reminder of safety practices or draws attention to
dangerous practices that can cause injury to persons, damage
to the boat or its components, or to the environment.
Notes for the user:
All the explanation for standard equipment of the boat is written in black. When is blue, means the
part is an option that could be present or not on the boat.
recommended by the manufacturer including the mass of
all persons on board, provisions and personal effects, all
equipment not included in the light weight of the boat
excluding the contents of the tanks.

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II. TECHNICAL SPECIFICATIONS
Technical data
Model:
DUFOUR CATAMARAN 48’
Builder
JJL CATAMARANS, via
monda 128 Forlì (FC), Italy
Architecture:
Umberto Felci
Interior Design
DUFOUR Design
Design Category
A
Register Number
CE/2406
CIN Number
IT-JJL_________
Primary means of propulsion
Sails
Lmax
Length overall* with bowsprit
14.70 m
LH
Hull Length *
14.20 m
Bmax
Maximum beam *
8.00 m
BH
Hull beam *
7.60 m
Tmax
Draft *
1.30 m
Standard mainsail Surface (approx)
72 m²
Surface Jib (approx)
48 m²
Code Zero Surface (approx)
90 m²
Gennaker Surface (approx)
110 m²
Maximum permissible engine power on board
60 HP
Water heater capacity
60 lt
Total fresh water capacity
690 lt (3 x 230 lt)
Total Fuel capacity
900 lt (2 x 450 lt)
Total Holding tank capacity
250 lt (5 x 50 lt)
Engine batteries
2 x 105 Ah
Service batteries
3 x 140 Ah AGM (or 2 x 210
Ah as option)
MLC
Light Displacement
17287 kg
MLDC
Full load displacement
22035 kg

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Lmax: maximum length of the boat including normally fixed parts such as davits, balconies, etc…
LH: maximum length of the vessel including the structural parts and integral part of the boat and
excluding the removable parts.
Bmax: width of the boat measured between the outermost parts and which may include removable
parts such as strakes, railings, etc ...
BH: width of the boat measured between the outermost fixed parts and excluding any removable
parts
HA: vertical distance between the light water plane and the highest point of the mast structure. (This
measure does not take into account equipment such as lights and antennas that can be attached to
the masthead)
Tmax: the maximum draft is measured at the lowest point of the ballast on the boat
ML: The Maximum Load is the sum of the recommended maximum load (see nameplate) and the
total mass of liquids (consumables or not)
NB: the capacity of the various tanks of fresh water and diesel is generally not entirely usable
according to the attitude or the loading of the ship. For diesel, it is recommended to keep a
reserve of 20%.
Stability
Stability calculation are performed following ISO/FDIS 12217-2:2015 by Felci Yacht Design Studio.
To keep safety condition for boat and crew, a sail reduction table according to apparent wind is here
reported.
Transverse True Wind
Longitudinal True Wind
Full Mainsail + Full Jib
0 –15 knots
0 –18 knots
Reef1 Main + 2/3 Jib
15 - 20 knots
18 - 25 knots
Reef2 Main + ½ Jib
20 - 25 knots
25 - 30 knots
Reef3 Main + 1/3 Jib
25 - 30 knots
30 –35 knots

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III. ELECTRICAL SYSTEM
Safety and use instructions for the electrical system
WARNING
•Risk of fire or explosion can result from improper use of DC and / or AC systems.
Always:
•Check the condition of the batteries (charge and electrolyte level) and the charging
system before going to sea.
•Disconnect and remove the batteries for overwintering.
•Maintain battery voltage above 10.5 V during winter storage.
•Take spare bulbs for all navigation lights and interior lights. Respect the powers
especially for navigation lights.
•Check the operation of the navigation devices.
•Check the operation of the navigation lights before sailing at night.
Never:
•Work on a live electrical installation.
•Modify an installation and the relevant drawings, unless this is done by a qualified
electrician.
•Change or modify the breaking capacity of the overcurrent protection devices.
•Replace electrical devices or equipment with components exceeding the specified
capacity without recalibrating the conductors and their protection.
•Leave the vessel unattended when the electrical installation is live, possibly with the
exception of an automatic bilge pump and fire or theft protection circuits.
If a fuse or breaker continues to blow, a specialist should be consulted to determine the cause of the
short circuit.
12 V Systems
The main circuit is supplied in 12 V. 12 V service batteries are located in the port side engine room.
The batteries can be charged either by the engine alternator or by the 110 V - 220 V / 12 V - 80 A
battery charger.

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Batteries
The battery bank consists of a 420 Ah service battery as standard (there are 3 batteries of 140 Ah
each in portside engine room) and a 105 Ah battery for starting the engine (one in each after cabin,
under the bed). The bank of batteries is located on the left after opening the engine room hatch.
As a option, instead of AGM batteries is possible to have two GEL batteries for services of the boat.
Their capacity has been studied to meet the energy needs of the accessories of the edge. To avoid
any problem, it is necessary to ensure the proper charging and maintenance of the batteries

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ATTENTION !
•When installing newelectrical appliances, make sure that the overallconsumption of these
appliances is in keeping with the capacity of your batteries.
•Always disconnect the - terminal of the battery before the + terminal.
•Never put the two terminals of a battery into contact with conductive objects (tools, etc ...)
•When handling batteries, avoid leaking electrolytic liquid by holding them horizontally.
Wear gloves and clothing to avoid any risk of contact with the electrolyte liquid in case of
leakage.
•In the event of electrolyte splash, thoroughly rinse the contact area and consult a doctor.
The 12 V consuming appliances circuit breakers are located behind the electrical panel. They can
be wound by pressing a black lug
Fans
As an option, on the boat can be installed 12 V fans for cabins and dinette.
WARNING
Do not stop the fans manually by hands or other objects when they are moving.
220 Volt Plant
DANGER !
The 220 V installation onboard is protected by a circuit breaker and equipped with a differential
block. Additional onboard accessory wiring in 220 V must be carried out by professionals with
the necessary recalibration of the general circuit breaker.
-Do not modify the electrical installation of the vessel or the relevant diagrams. Installation,
modifications and maintenance should be performed by a qualified electrician. Check the
system at least every 2 years
-Disconnect the ship power connectors when the system is not in use.

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-Use electrical appliances with double insulation or grounding.
-A differential circuit breaker (DDR) test should be performed monthly if possible.
DANGER !
Your boat is delivered without a boat/dock power cable and without a plug on the dock terminal.
The cable should be provided for outdoor use. Its section must be adapted according to its length
and the power of the main circuit breaker (see electrical diagram). The socket must be adapted
to the socket of the dock (ask a professional if necessary).
Warning: To reduce the risk of electric shock and fire.
● Turn off the docking power at the on-board disconnect device before plugging in or
unplugging the boat/dock power cable.
● Connect the boat/dock power cable to the boat before plugging it into the dock terminal
● Unplug the boat/dock power cable from the dock terminal before disconnecting it to the boat
● Close the protection of the power inlet to the dock
Never:
● Modify the connections of the ship/dock power cable; Use only compatible connections.
● Swimming near a boat connected to a docking station: risk of electric shock!
ATTENTION !
When the vessel is docked, put the circuit breaker in the open position.
Location of the 220 V main circuit breaker: Starboard engine room. Check the system at least every
two years. When servicing out of water, put in the closed position to have earth protection via shore
power.
WARNING
Do not allow the end of the ship/dock power cable to hang in the water. This can result in an
electric field that could injure or kill the swimmers located nearby.

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Generator
As an option, on the boat can be installed a Generator of 12 kW of power. The generator is located
in the starboard engine room. Its function is to re-supply the batteries via the chargers and supply
220 V electricity on board.
STARTING OPERATION
After having turned ON the cut-outs located in the starboard engine room, the generator can be
turned on either on the generator itself or using its control located in dinette near the charter table.
1. Oil level control (ideal level: 2/3 MAX). The level should be about 2/3 of the maximum level
of a cold engine. Further, if installed, the oil level of the oil-cooled bearing must be controlled
before each start - see sediment bowl at generator front cover.

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2. State of cooling water. The external expansion tank should befilled up to 1/3 of themaximum
in a cold state. It is very important that a large expansion area remains above the cooling
water level.
3. Check if sea cock for cooling water intake is open.For safety reasons, the sea cock must be
closed after the generator has been switched off. It should be reopened before starting the
generator.
4. Check raw water filter. The raw water filter must be regularly checked and cleaned. The
impeller fatigue increases, if residual affects the raw water intake.
5. Visual inspection. Control fixing bolts, check hose connectors for leakages, control electrical
connections.
6. Switch off the load.The generator should only be started without load.
7. Open fuel valve, if installed.
8. Close battery main switch (on).
For the use and maintenance of the generator, please refer to its instruction guide.
Sea water in valve (left) & Sea water out valve (right) Cooling tank filled 1/3

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IV. GAS SYSTEM
The hatch on deck leftside of sliding door has been designed to store two gas tanks (see gas plan).
The circuits opening / closing valves are located in the forniture under the stove unit. Gas tank isn’t
supplied with the boat
Generalities
-Operating pressure: 30 mbar (see indication on gas box label and regulator valve)
-A gas-powered appliance uses the oxygen and releases combustion products. Ventilateyour
boat when you use this appliance through openings of hatches in dinette
-Do not obstruct the quick access to the elements of the gas installation (bottle chest, shut-off
valve)
-Regularly inspect the hoses, at least annually, and change them if there are any signs of
deterioration, if the expiry date has passed or if it is five years after the date of manufacture
written on the hose

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-Valves attached to empty bottles must be closed and disconnected. Protective caps, covers
or caps must be kept in place. The reserve gas tanks shall be in lodgings or boxes for LPG
cylinders with an outward ventilation circuit or stored outside the vessel, protected from
inclement weather and mechanical damage and from escaping gases to evacuate only
towards the outside of the boat
-LPG bottle chests must not be used for the storage of any other material
-Make sure that the gas cylinder and regulator comply with the recommendations of the stove
(flow, pressure, type of gas) and the regulations in force in the country of use
Operation of gas system
-Valves on supply lines and gas tank valves must be closed when appliances are not in use,
before filling and immediately in case of emergency
-Appliance faucets must be closed before opening the cylinder valve
-Limit the stove using when large angles of roll or heeling are likely
WARNING
Flame-burning appliances burning fuel consume oxygen from the cabin and release combustion
products into the vessel. Good ventilation is required: open the fly hatch when appliances are
running.

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System Check
The LPG system should be leak tested before each use as follows:
-Close the valve of the device, open the valve of the LPG cylinder, let the gauge pressure
stabilize, close the valve of the LPG cylinder, observe the pressure indicated by the
manometer located near the bottle for three minutes. The pressure indicated by the
manometer should be constant if there are no leaks in the system
-Information: the pressure gauge does not give an indication of the quantity of liquid LPG
remaining inthe bottle, but onlyits vaporpressure, which is aconstant at agiven temperature
If a leak of LPG is detected or suspected, immediately take the following measures:
-Turn off the power at the main supply tap (s).
-To extinguish open flames and other sources of ignition (heaters, cooking appliances, night
lights, etc.)
-Do not operate an electrical switch.
-Evacuate the area, if possible
WARNING
Do not use a leaked installation until it has been inspected and repaired by a competent person.
DANGER !
Never use an open flame to check for leaks.
-Note: The above tests do not replace the verification that is recommended to be done by a
professional periodically

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Security Warnings
WARNING
•Never leave the vessel unattended when open-flame appliances are operating
•Do not smoke or use a naked flame while replacing LPG cylinders. Close the empty bottle
valve before disconnecting to replace it. Ventilate the compartment housing the bottle when
replacing it.
•Do not use the stove / oven as a heater.
•If a leak is detected, close the LPG main supply valve and do not use LPG appliances.
•Never smoke while going down inside the boat when it was closed, make sure there is no
smell of gas.
•Do not modify the LPG system of the boat. Installation, modifications and maintenance
must be performed by a competent person. Have the system checked at regular intervals
or set by national requirements.
ATTENTION !
•Precautions must be taken to avoid contact with open flames and other hot areas.
•Do not use solutions containing ammonia during manual leak testing
Barbeque
The boat can be equipped with a BBQ as a option. As for the galley, the gas tank isn’t supplied
with the boat. Storage of gas tank for BBQ is under the BBQ.