Lagoon 620 User manual

www.cata-lagoon.com
LAGOON 620
EN
OWNER'S MANUAL

2

3
1. INTRODUCTION................................................................................................................................................ 4
2. SPECIFICATIONS.............................................................................................................................................. 6
2.1. Identication sheet of your boat....................................................................................................................... 6
2.2. Dimensions................................................................................................................................................................ 6
2.3. Load ............................................................................................................................................................................. 7
2.4. Rigging & sails .......................................................................................................................................................... 9
3. SAFETY................................................................................................................................................................. 12
3.1. Fire................................................................................................................................................................................ 12
3.2. Visibility ...................................................................................................................................................................... 15
3.3. Stability, danger of inltration............................................................................................................................ 15
3.4. Prevention of man overboard ............................................................................................................................ 16
3.5. Liferaft (not provided) ........................................................................................................................................... 17
4. EQUIPMENT....................................................................................................................................................... 18
4.1. Motorization ............................................................................................................................................................. 18
4.2. Steering system ....................................................................................................................................................... 19
4.3. Electrical system ...................................................................................................................................................... 20
4.4. Gas and fresh water system................................................................................................................................. 26
4.5. Waste holding tanks............................................................................................................................................... 28
4.6. Pumps, valves and sea-cock ttings................................................................................................................. 30
5. ANCHORING, MOORING AND TOWING................................................................................................ 32
6. HOISTING AND TRANSPORT ..................................................................................................................... 33
7. REFERENCES AND STANDARDS............................................................................................................... 34
Updated 02.2013
OWNER'S MANUAL
CONTENTS

4
Dear Sir / Madam,
You have just taken delivery of your new
LAGOON and, rst of all, we thank you for the trust
you have shown in buying a boat of our brand.
A LAGOON is made to last. From its design
to its construction and eventually to its launching,
every boat, includingthesmallest details, is considered
with the very care it deserves in order to ensure
you the years of joy you expect.
This manual is intended to help you enjoy your
boat in safety. It includes many details about the boat
specications, the provided or installed equipment
and also information on how to use it. Read it carefully
and familiarize yourself with the boat before sailing.
This Owner's manual is not a course on safety
at sea or good sailing sense. If this is your rst boat,
or if you are changing to a new type of boat with
which you are not familiar with, both for your comfort
and your safety, we would advise you to obtain some
training before taking the helm of your new boat.
Your retailer, your national sailing or motor vessel
federation or your yacht club would be delighted to
inform you about the local sailing schools or skilled
instructors in the area.
Make sure that the forecast wind and sea
conditions match with the build category of your boat,
and that you and your crew are capable of sailing safely
your vessel in such conditions. Even when your boat is
suited, the sea and wind conditions corresponding to
the build categories A, B and C may vary from heavy
storm for the A category to severe conditions for the
C category. These situations, during which may occur
exceptional waves and gusts, are therefore dangerous
and only an experienced crew, well trained and
prepared is able to sail a vessel, provided it is properly
maintained.
This Owner's manual is not a course in
maintenance and repair. In case of diculty, do not
hesitate to ask your builder or representative. If a
maintenance manual is provided, do not hesitate to
use it. Always ask an experienced professional for the
maintenanceor your boat, for the installation offurther
accessories or for any modication. Any modication
which may alter the safety specications of the boat
have to be estimated, carried out and documented
by qualied people. The builder can not be liable for
modication that would not have been approved.
Please note that, in some countries, a sailing
license or authorization is required or specic
regulation has to be observed.
Always keep your boat correctly maintained
and take into account the damages due to time or,
if applicable, due to an intensive or inappropriate
usage of the boat. Any boat, as solid as it can be,
may be severely damaged if not sailed properly.
This is not compatible with a safe sailing experience.
Always adapt the speed and the direction of the boat
to the sea conditions.
If your boat is tted with a life raft, read
carefully its user's guide. It is necessary that the
crew can nd on board all the safety equipment
(life jacket, harness, etc.) corresponding to the vessel,
to the weather conditions, etc. This equipment
has been made mandatory by some countries. It is
necessary for the crew to be familiarized with the use
of all the safety equipment and with the emergency
safety procedures (MOB, towing, etc.). Sailing schools
and yacht clubs often oer training sessions.
It is recommended that everybody wears
appropriate safety equipment (life jacket, individual
buoyancy aids) when they are on the deck. Please note
that, in some countries, always wearing a buoyancy
aid in conformity with the local standards has been
made compulsory.
1

5
The users of this boat are informed that:
All the crew members have to be properly trained.
Do not sail at maximum speed in areas of dense trac
or in case of reduced visibility, strong winds or high
waves. Reduce the speed and the wake of the boat, by
respect to others but also as a measure of safety, both
for them and for yourself. Respect the speed and wake
limits when zones are dened.
Respect the priority rules set by the navigation
regulations and laid down by the COLREG.
Make sure that you always have a sucient distance to
stop or steer the boat in order to avoid a collision.
The dierent warning used throughout this guide are
as follow :
xDANGER
Warns you about the existence of an extreme
hazard that is very likely to induce serious or fatal
consequences if the appropriate precautions are not
taken.
WARNING
Warns you about the existence of a hazard that may
have serious or fatal consequences if the appropriate
precautions are not taken.
!ATTENTION
Warns you about safety practices or draw your
attention to dangerous practices that may hurt people
or caused damages to the boat, its components or to
the environment.
KEEP THIS MANUAL IN A SAFE PLACE AND
PASS IT TO THE NEW OWNER SHOULD YOU
SELL THE VESSEL.
INTRODUCTION

6
2.1 .Identication sheet of your boat :
Number of people recommended per build category
WARNING
Do not overcome the recommended maximum
number of people. Regardless of the number of
people on board, the total weight of the people and
of the equipment should not exceed the maximum
recommended load. Always use the seating
provided.
* according to ISO 8666
NAME OF THE BUILDER CONSTRUCTION
NAVALE BORDEAUX
BUILD CATEGORY A
MAXIMUM RECOMMENDED
POWER
2 X 110CV
(2 X 81 KW)
CERTIFYING ORGANISATION
NUMBER CE0607
2. SPECIFICATIONS
Category Maximum number
of people
A14
B14
C16
D30
Category Wave height
(m)
Wind force
(Beaufort)
A > 4 > 8
B < 4 ≤ 8
C < 2 ≤ 6
D< 0.5 ≤ 4
LENGTH OF THE HULL 18,20 m*
HULL BEAM 10,00 m*
MAXIMUM LENGTH 18,90 m
MAXIMUM BEAM 10,00 m
KEEL DRAUGHT 1,55 m
MAXIMUM HEIGHT 31,00 m
Builder's plate: certain information is given on the
builder's plate xed to the vessel.
You will nd an extensive explanation of this
information in the dedicated chapter of this
manual.
REMINDER OF THE CATEGORIES
Category A: the boat is designed for sailing in winds that may
exceed force 8 on the Beaufort Scale and in waves of a signicant
height of 4 m or more and the boat is to a large extent self -
sucient. Unusual conditions such as hurricanes are excluded.
You may meet with such conditions when sailing long crossings,
for instance across the oceans, or close to the shore when you are
not protected from the winds and waves over several hundreds
of nautical miles.
Category B: the boat is designed for sailing in winds that may
not exceed force 4 on the Beaufort Scale and in corresponding
waves (waves of a signicant height of 4 m or less (see Note 1
below). You may meet with such conditions when sailing at open
sea during quite a sucient time, or close to the shore when you
are not protected from the winds and waves over several dozens
of nautical miles. You may also meet with such conditions when
sailing quite important inland seas which could produce waves
of this height.
Category C: the boat is designed for sailing in winds that may not
exceed force 6 on the Beaufort Scale and in corresponding waves
(waves of a signicant height of 2 m or less (see Note 1 below).
You may meet such conditions when sailing exposed inland
waters, estuaries and inshore waters with moderate weather
conditions.
Category D: the boat is designed for sailing in winds that may
not exceed force 8 on the Beaufort Scale and in corresponding
waves (occasional waves of 0.5 m maximum (see Note 1 below).
You may meet such conditions when sailing non exposed inland
waters and inshore waters under good weather conditions.
NOTE 1 - The signicant height of a wave is the average height of
the upper third of the waves, which corresponds more or less to
the height an experienced observer can assess. Some waves will
be twice as high as this value.
The sails are the principal means of propulsion of the
Lagoon 560.
The Lagoon 560 is in conformity with the Directive
2003 44 CE .
2.1 .Dimensions
2

7
2.3 .Charge
NAVIGATION CATEGORIES ABCD
Light vessel: 29 960 29 960 29 960 29 960
Safety equipment 50
Sail 410
Light displacement 30 520
Life-raft: (2) 160
Crew 1 050 1 050 1 200 2 250
Water 960
Fuel 1 040
Supplies and personal belongings:
ICNN instruction : 30kg minimum Cat
A, 20kg Cat B, 10kg Cat C, 5kg
Cat D
420 280 160 200
Optional equipment ABCD
Anchoring (anchors + chain + anchor
chain) 500
Spinnaker rigging + spinnaker 60
Gennaker rigging + spinnaker 60
Electric genoa sheet winch x2 64
Electric genoa sheet winch x2 52
Lazy bag + Lazy jack 13
Canvas surround with windows 18
Supplementary swimming ladder 7
Davits 350
Tenderlift 350
Teck option 235
Sunbathing cushion 7
Forward and aft cockpit cushion 35
2nd cockpit deck shower 2
Inlet valve for shore freshwater 2
Microwave oven 17
Dishwasher 28
Replacement with coolbox or supple-
mentary fridge 15
Watermaker ( x2) 130
Icemaker 18
Replacement with coolbox or supple-
mentary fridge 75
Ventilators in the saloon 2
Ventilators in the cabins 2
Heating (not compatible with air
conditionning) 56
Air conditionning 250
SPECIFICATIONS

8
NAVIGATION CATEGORIES ABCD
Berth cabin in port bow 60
Berth cabin or bathroom in starboard
bow 50
Entry door curtain 3
2 battery chargers 100 A 18
Inverter 12 V / 220 V 8
Genset + cocon 17 KVA - 220 V 450
Dual engine controls 12
Antifouling 88
Laser loader radio + 2 speakers 3
Cockpit watertight loudspeaker (x4) 2
VHF 1
GPS 2
Electronics:
Speedometer/depth sounder/plotter 5
Autopilot 10
Radar 3
Mooring lines and fender 50
Tenders + engine 450
Diving equipment 120
Others 450
MAXIMUM LOAD DISPLACEMENT (kg) 38 290 38 150 38 180 40 020
MAXIMUM LOAD (kg) 7 770 7 630 7 660 9 500
MAXIMUM LOAD = maximum load displacement - light vessel
The recommended maximum load includes the
weight of all people on board, of the supplies and
personal belongings, of all the equipments which
are not included in the weight of the light vessel, of
the freight (if applicable) and of all the consumable
liquids (water, fuel, etc. ).
WARNING
When loading the boat, you should never exceed
the recommended maximal load. You should always
load the boat with caution and distribute the loads
thoroughly in order to preserve the theoretical trim
(approximately horizontal). Avoid placing heavy loads
in the upper storage space.
2

9
VOILE SURFACE Dimensions
MAIN SAIL 146 m I 25.36 m
GENOA MAXI 97 m J 6,289 m
STAYSAIL 51 m P 24,7 m
GENNAKER 175 m E 8,26 m
SPINNAKER 300 m
P
LP
P
I
J
E
2.4 .Rigging & sails
2.4.2 . Maintenance of the rigging:
Regularly check the standing and running rigging,
at least once a year.
Considering the metal cables:
Have them changed as soon as the rst rust-
spot appears. Check for corrosion, particularly at
connections with the turnbuckles. Check that the end
ttings and the turnbuckles are in good condition.
Considering the synthetic ropes of the backstays,
halyards, sheets, mooring lines, etc.:
Have them changed as soon as the rst signs of wear
and tear or chang appear.
Regularly check the other parts of the rigging, sheets,
mooring lines, etc. and have them replaced if worn.
2.4.1 .Sails specications:
SPECIFICATIONS

10
2.4.3 .Mast handling diagram
1 - Spinnaker / gennaker halyard (option)
2 - Mainsheet
3 - Reef pendant 3
4 - Lu pendant - reef 3
5 - Mainsail topping lift
6 - Reef pendant 1
7 - Reef pendant 2
8 - Main halyard
9 - Lu pendant - reef 1
10 - Lu pendant - reef 2
11 - Staysail sheet
12 - Genoa sheet
13a-b -Spinnaker / gennaker sheet + spinnaker guy
14a -Portside control lines for mainsheet traveller
14b -Starboard control lines for mainsheet traveller
2

11
SAIL REDUCTION
ATTENTION
Any adjustment diering from these instructions may cause the rupture of the mast. In particular,
the 100% genoa with 2 reefs in the mainsail must be absolutely avoided.
MAX. TRUE WIND
WIND KNOTS SAILS
FORCE 1  4 20 MAINSAIL 100 %
GENOA 100%
WIND KNOTS SAILS
FORCE 5 25 MAINSAIL 1 REEF
GENOA85%
WIND KNOTS SAILS
FORCE 6 30 MAINSAIL 1 REEF
GENOA70%
OR STAYSAIL 100%
WIND KNOTS SAILS
FORCE 7 35 MAINSAIL 2 REEFS
STAYSAIL 85 %
WIND KNOTS SAILS
FORCE 8 40 MAINSAIL 3 REEFS
GENOA40%
WIND KNOTS SAILS
FORCE 9 45 MAINSAIL 3 REEFS
GENOA30%
!
SPECIFICATIONS

12
1
1 2 3
Version cuisine / coque
1 2 3
Version cuisine / carré
1 - Fixed extinguishing
system for the engine
bilge.
1 - Cut o device of generator
tank fuel supply (portside).
2 -Release mechanism of
portside engine bilge
extinguisher.
3 - Cut o device of portside
tank fuel supply.
1 - Cut o device of portside
tank fuel supply.
2 - Release mechanism of
portside engine bilge
extinguisher.
3 - Cut o device of generator
tank fuel supply (portside).
Access by the pull handles under the hob in
the gallery in the portside hull aft
Access by the pull handles behind the hatch
under the bedside storage at the aft end of the
port hull.
4 5
4 - Release mechanism of starboard
engine bilge extinguisher.
5 - Cut o device of starboard tank
fuel supply.
Access through the hole behind the WC in the
starboard hull aft.
Access in the engine bilges.
3.1 .Fire
3.1.1 .Risks
3.1.2 .Fire ghting equipment
Portable extinguishers: to be provided by the
owner.The enforcement of the national regulation
under the ag of which you are sailing is your
responsibility. The boat, when sailing, must be
tted with portable extinguishers.
We advise you to provide at least 1 extinguisher
within a 5 meter distance to each berth, within a
2 meter distance of the extinguisher access hole
to the engine compartment, within a 2 meter
distance to every appliance using a naked ame
and, eventually, 1 extinguisher within 1 meter of
the steering wheel.
We advise a total capacity of at least 8A / 68B for
all the portable extinguishers, each of them with a
least a capacity of 5A / 34B. The CO2 extinguishers
have to be used for the kitchen or electrical res.
The vessel is delivered with 1 CO2 extinguisher in
every engine compartment.
The location is dened in the diagram below. This
location is the same for any of the 3 versions.
3. SAFETY
The main risks are related to the motorization
(§4.1), to the electrical system (§4.3) and to the
gas system (§4.4).
Please refer to the appropriate sections.
Galley / hull version Galley / saloon version
3

13
1
4
3
4
3
2
1
2
3
1
1 - Emergency exit.
2 - Extinguisher.
3 - Release pull handle of engine extinguisher.
4 - Engine extinguisher.
5 - Distress ares.
6 - First aid kit.
7 - VHF (optional).
8 - ...........................................................................
9 - ...........................................................................
10 - .........................................................................
11 - .........................................................................
12 - .........................................................................
13 - .........................................................................
14 - .........................................................................
15 - .........................................................................
16 - .........................................................................
1 - "Manhole" hatch.
2 - Hammer to break the glass in the
event of capsizing.
Version cuisine / coque
Version cuisine / carré
3.1.3 .EMERGENCY EXITS
The recommended emergency exits are indicated on the opposite diagram:
RECOMMENDATIONS
Some elements do not have pre-determined location.
Fill-in this diagram with your own safety equipment.
Galley / hull version
Galley / saloon version
1 2
1
SAFETY

14
General points
WARNING
Do not install free hanging curtains or any other textile next to or over the cooking appliances or any other
naked ame devices.
Ensure the bilges remain clean and check regularly there is no vapor or leaks of fuel and gas.
Do not store ammable products in the engine compartment.
Do not leave the boat unsupervised when using cooking and or heating devices.
Do not smoke while handling fuel or gas.
Make sure the re ghting equipment can be
reached easily when people are on board. Inform
the crew of:
• the location and functioning of the re ghting
equipment.
• the location of discharge valves in the engine
compartment.
• the location of routes and exits.
In case you had to replace some elements of the
re ghting equipment, only use appropriate
appliances, bearing the same reference or having
similar technical specications and re resistance.
If non ammable products are stored in the engine
compartment, they must be stored in order not to
fall on the machinery and they should not prevent
neither the entrance nor the exit of the engine
compartment.
■Do not block the way out nor the hatchways.
■Do not block the safety control such as: fuel
valves, gas valves, electrical system switches.
■Do not block the access to the portable
extinguishers tted in the cupboards.
■Do not use gas lamp in the boat.
■Do not alter any equipment on board (especially
the electrical, fuel and gas systems) nor allow
non qualied people to alter any equipment of
the boat.
■Do not ll up the fuel tanks nor the gas cartridges
when the engine is running or when cooking or
heating devices are in use.
Fire ghting equipment maintenance
It falls to the owner / user:
To have the re ghting equipment regularly
checked, respecting the frequency indicated on
the equipment
■If the portable re ghting equipment has passed
its use-by date or if it is discharged, to replace it
with devices of same or superior extinguishing
capacity.
■If the xed extinguishing systems have passed
their use - by date or if they are discharged, to
have them lled up or replaced.
3

15
3.2 .Visibility
Visibility from the command post may be hindered
because of extreme leaning due to the vessel's trim
or because of other factors linked to one or several
of the following conditions:
• Load and load distribution
• Speed
• Sea conditions
• Rain and spray
• Obscurity and fog
• Light in the boat
• Position of the upper or lateral awnings
• Peopleorremovableequipmentinthehelmsman's
eld of view
• In motor-driven boats, rapid acceleration or
transition from drive-limit to hydroplaning
• Angle of the trim regulator with regard to the
engine (for the vessels equipped)
• Angle of the trim regulator with regard to the hull
(for the vessels equipped)
• Sailing heel, the sails reducing the visibility
leeward.
The international regulation to prevent collisions
at sea (COLREG) and course regulations make
mandatory a permanent and proper supervision
and the observance of priority. To observe these
rules is essential.
3.3 .Stability, danger of inltration
Reduce your speed before making tight bends in
order to avoid losing control.
While sailing, keep every porthole, window and
removable door closed.
Stability is reduced when upper storage spaces are
loaded.
Stability may be reduced when another boat is
towed or when heavy weights are lifted with the
davits or the boom.
Breaking waves are serious dangers both for
stability and water inltration.
Fasten the doors and hatchways in case of rough
seas.
Never sail a boat with a negative trim adjustment
(low stem) when sailing high speed.
This can induce the boat to heel over and therefore
cause an instability in the turns. Use a negative trim
when going from limit speed to hydroplaning and
at lower speed in the chop.
The compartment marked as being air pockets
should not be pierced.
If your boat is certied as unsinkable, it is capable of
bearing its passengers, even in case of inltration.
On boats where a bilge pump is not required, it is
the responsibility of the user / owner to have on
board at least a bucket / bailer equipped with a
mean to prevent its loss overboard.
SAFETY

16
3
3.4 .Prevention of man overboard
The swimming ladder is removable. It is stored in
the aft cockpit locker.
The deck areas which are not considered as being
part of the working deck and which should not
be used when sailing are hatched on the diagram
below.
Regularly check the lifelines:
Considering the metal lifelines, check the
appearanceof rust-spotsandcorrosion,particularly
at connection points.
Considering the synthetic lifelines, have them
changed as soon as the rst signs of wear and tear
appear because of chang or of UV.

17
1 - Location for life buoy.
2 - Deck eye for life line fastening.
3 - Emergency tiller.
4 - Emergency tiller cover.
5 - Location for life raft.
6 - Manual bilge pump.
7 - Extinguisher.
8 - .........................................
9 - .........................................
10 - .......................................
11 - .......................................
12 - .......................................
5
3
2
2
2
2
2
2
2
2
2
6
6
6
6
4
1
1
4
5
SAFETY
3.5 .Life raft (not provided)
Carefully read its user's guide.
Security equipment location (to complete with your own safety equipment if necessary).

18
4
For more information on the tted devices, read the provided manuals attached to the boat documentation.
4.1 .Motorization
4.1.1 .Directions for use
Do not install on this vessel a heavier or more
powerfulenginethanwhathasbeenrecommended:
this may induce a risk for the stability.
Stop the engine. Do not smoke when lling up the
fuel tank.
For outboard engines tted with a jerrican, ll
up the portable tank outside the boat in a well
ventilated area, far from any re risk.
Fuel stored somewhere else than in the tanks
(jerricans, feed tanks...) must be kept in a ventilated
place.
Before starting, ensure that the engine hold is clean
and dry. Any trace of fuel in the bilges should make
you postpone your departure.
Avoid any contact between ammable products
and hot parts of the engine.
Locate the extinguisher access hole which would
allow you to knock down a re in the engine hold.
For boats equipped with a petrol engine, ventilate
the engine compartment using the engine blower
during 4 minutes in order to evacuate any possible
petrol vapors.
For certain models, a xed extinguisher system,
allowing knocking down a re in the engine hold,
is provided. Learn where to nd its activation
switch and how it works (see 3.1.2). It is necessary
to ventilate the engine hold after having used it.
Check that the apertures for ventilation are clear of
any obstruction.
Do not block nor modify the ventilation system.
Before starting, ensure that:
- the engine control is not engaged,
- the water control intake valve of the cooling
system is open and check that there is some
water actually coming out of the exhaust when
the engine has started (water may be mixed with
exhaust gas in case of wet exhaust).
It is not recommended to work on moving parts or
next to them (engine, line shaft, etc.).
If an intervention is made necessary:
- stop the engine and or the rotation of the line
shaft before working on one of their parts.
- beware of loose - tting clothing, hair, rings which
may get caught up. Wear appropriate clothes
(gloves, hat, etc.).
If equipped with a petrol engine, beware of the
danger of falling asleep because of carbon dioxides
fumes.
In case of fuel spillage on the deck when lling up,
have it cleaned before starting.
Anticipate the deterioration of fuel pipes.
Fuel hoses have to be replaced by hoses bearing
the same markings.
4. EQUIPMENT

19
1
4
6
3
5
2
7
8
1 - Fuel tanks.
2 - Fuel closing pull handle.
3 - Sea water lter.
4 - Fuel lter.
5 - Engine water inlet valve .
6 - Engine.
7 - Expansion tank.
8 - Diesel oil tank llers.
Each hull has the same components.
Nota : each valve in the boat is identied.
EQUIPMENT
4.1.2 .Fuel tanks: 2x650 liters DIESEL
4.2 .Steering system
The steering system is hydraulic.
AB
C
D
FLY
COQUE
HULL

20
2
1
3
4
4
Emergency tiller
For the boats equipped with a steering wheel, an
emergency tiller is provided. Ensure it can be easily
reached anytime.
Unscrew the tiller cover on the aft step, push the
emergency tiller in the print in the rudder head.
Fasten the emergency tiller with the screw and the
nut (#3).
The emergency tiller is designed for sailing at
reduced speed only, in the event of a wheel
failure.
4.3.1 .Electrical panel and circuit and 12V – 24V
Never work on a live electric circuit.
The batteries must be thoroughly fastened.
Do not block the battery ventilation conducts:
some of them let out hydrogen, which could be an
explosion risk.
Batteries have to be handled with care. In the event
of electrolyte projection, abundantly rinse the part
of the body which has been aected and consult
a doctor.
In order to avoid short-circuiting between the two
poles of the battery, do not store any conductive
objects next to the batteries (metallic tools...).
When charging, connecting or disconnecting the
batteries, switch o the battery cut-outs.
Never modify the specications of the appliances
protecting against overloads.
Never modify an installation. Ask a technician
skilled in marine electricity to do so.
Never install or replace electrical equipment or
appliances by new components exceeding the
circuit amperage.
Do not leave the boat unsupervised when the
electrical system is under power, this excepting
the automatic bilge pump and the re and burglar
protection systems.
Please note that the 12 V circuit wires are red for
live and black for negative.
Those of the 24 V circuit are white or brown for live
and blue for negative.
4.3 .Electrical system
1 - Steering ram valve.
2 - Emergency tiller.
3 - Emergency tiller screw and nut.
4 - Valve of the ram in the by-pass position.