Lagoon 380 User manual

UUsseerr’’ssgguuiiddee

We share a common passion for the sea: we, LAGOON, as boatbuilders and
you, who want to live out your enthusiasm for the oceans.
We are delighted to welcome you to the great family of LAGOON boat owners
and we would like to congratulate you on your purchase.
This instruction guide is intended to help you to enjoy your boat in comfort and
safety. It includes the boat specifications, the equipment provided or installed,
the systems on board and tips on her use and maintenance. Read this manual
carefully before you put out to sea so that you can make the most of her and
avoid any damage and difficulties. Read the manual and familiarize yourself
with the vessel before using it.
We are continuously concerned to bring you the benefit of the latest
technology, new equipment and material as well as our experience and
therefore the boats are regularly improved. It is for this reason that the
characteristics and information are not contractual and may be modified
without prior warning and without obligation of updating.
This owner's manual has a general purpose and it may mention some
equipment or accessories or deal with some points or questions that are not
relevant to your own boat ; if in doubt, refer to the inventory that you received
on delivery of your boat.
For your comfort and safety if this is your first vessel or if your are changing
to a new type of boat with which you are not familiar make sure that you
obtain experience in preparing and handling before "taking command" of the
vessel. Your dealer, international sailing association or yacht club will be able
to recommend local sailing schools or professional instructors
Although everything possible has been planned and designed with the safety
of the boat and its users in mind remember that sailing is highly dependent on
the weather conditions and the sea state, and that only an experienced and
very fit crew, handling a well-maintained boat, can sail satisfactorily.
The sea and wind conditions that correspond to design categories A, B and C
are changeable and are still susceptible to the risk of unusually large waves
or strong gusts of wind. Total safety cannot therefore be guaranteed, even if
your boat meets the requirements of a category.
Always consult the weather and shipping forecasts before
taking your boat out to sea.
Make sure that the sea and wind conditions forecast
correspond to the category of your boat, and that you and
your crew are able to handle the boat in these conditions.
Our network of LAGOON authorized dealers is available to
help you get acquainted with your boat and is best qualified
to take care of her maintenance.

The sea and the water are not Man's natural environment and we must
respect its laws and its strength.
Adapt the use of your boat to her condition, which deteriorates with time and
use.
Any boat, however well built, may be severely damaged if badly used. This is
not compatible with safe sailing. Always adapt the speed and direction of your
boat to the sea conditions.
The 'COLREG' international regulations for the prevention of collisions at sea,
published by the International Maritime Organization, specify the rules relative
to steering and courses, navigation lights etc. throughout the world.
In many countries, a licence, an authorization or training certificate will be
required.
Make sure you have the necessary legal authorization before you use your
boat.
Always ensure an experienced professional carries out the maintenance of
your boat, installs any accessories and the makes any small modifications.
The written authorization of the builder or his legal representative is
compulsory for modifications that alter the specifications of the boat, in
particular the vertical arrangement of forms (installing a radar, modifying the
mast, changing the engine, etc.).
Users of the boat are advised that:
- The entire crew must be properly trained.
- The boat must not carry a load heavier than the maximum load
recommended by the builder, in particular the combined weight of food
supplies, equipment not supplied by the builder and people on board. The
weight carried by the boat must be properly distributed.
- The water in the bilge must be maintained at a minimum.
- Stability is reduced when you add weight to the upper sections.
- In the event of heavy weather, the hatches, lockers and doors must be closed
in order to minimize the risk of water entering the boat.
- Stability may be reduced when towing another boat or when lifting heavy
weights using the davits or the boom.
- Breaking waves are a serious danger to stability.
- If your boat is equipped with a liferaft, read the instructions carefully. All the
proper safety equipment must be carried on board (harnesses, flares, liferaft,
etc) according to the type of boat, the country in which it is used, the weather
conditions, etc.
- The crew must be familiar with the use of all the safety equipment and all
emergency safety procedures (MOB, towing etc.).
- All people on deck must wear a life jacket or a buoyancy aid. Please note that
in some countries it is compulsory to wear an approved buoyancy aid at all
times.
Keep this user's guide in a safe place and pass it on to the
new owner if you sell the boat.
For essential or optional equipment (engine, electronics
etc.) refer to their respective manuals supplied with your
boat.

CONTENTS
Using your boat
1 Navigation .......................................................................................5
2 Winter storage...............................................................................23
3 Launching .....................................................................................27
Construction and Equipment
4 Hull & deck....................................................................................35
5 Layouts .........................................................................................41
6 Electricity.......................................................................................49
7 Plumbing .......................................................................................59
8 Motorization ..................................................................................69
9 Rigging & sails ..............................................................................79
10 Safety ............................................................................................89
11 General Specifications................................................................101
Notes
3
UPDATED 08/2008
Chapter Page number
This user's guide may sometimes list equipment or touch on certain topics which are not part of the standard specifications of your particular boat.
The guide covers all the versions and main options of these models

5
GETTING UNDERWAY . . . . . . . . . . . . . . . . . . 7
NAVIGATION VISIBILITY . . . . . . . . . . . . . . . 7
NAVIGATION UNDER MOTOR . . . . . . . 9
NAVIGATION UNDER SAIL . . . . . . . . . . . 11
MOORING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
TOWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
ANCHORING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DAVITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
ENVIRONMENT . . . . . . . . . . . . . . . . . . . . . . . . . 21
Navigation 1

GETTING UNDERWAY
6
NAVIGATION
LAGOON 42O
BLOCKING OF
SLIDING DOOR
BATTERY SWITCHES
- PORT ENGINE
+ HOUSE PORT AFT CABIN
ENTRANCE SWITCHES
11 - Saloon ceiling light switch.
2 - Galley ceiling light switch.
3 - Spotlight switch for rigid bimini (optional).
4 - Saloon ceiling light switch.
2
3
4
BATTERY SWITCHES - STBD
ENGINE + ENGINE COUPLING
STBD AFT CABIN

Getting Underway
The sliding door locks in three different positions: closed, ajar (airing
position) and open.
A latch on the doorframe enables locking from inside the saloon.
Switch on the mains power of the boat by activating the battery
switches located in the port and starboard aft cabins, then activate
the different accessory switches on the electrical panel.
Check the charge rate of the batteries, the water level in the tanks and
the fuel level (see ELECTRICITY and MOTORIZATION chapter).
Carry out the inventory of compulsory safety equipment and instruct
the crew concerning its location and operation.
Navigation visibility
The international regulations to prevent collision at sea (COLREG) and
course regulations make mandatory a permanent and proper
surveillance and the respect of priority. Make sure there is no other
boat in your course.
Visibility from the steering station may be obstructed by the following:
- Load and load distribution.
- Sea conditions, rain, spray, fog or darkness.
- Lights on inside the boat.
- People and mobile equipment in the helmsman's field of visibility.
NAVIGATION
7
NAVIGATION
1
LAGOON 380
RECOMMENDATION
While sailing lock the sliding door shut.
DANGER
Remember to disconnect the shore power supply
before casting off.

8
NAVIGATION
LAGOON 380
FUEL VALVES
1
2
1
2
1 - Fuel tank.
2 - Fuel valve.
FUEL VALVE

NAVIGATION
9
NAVIGATION
1
LAGOON 380
Navigation under engine
Before starting the engine:
- Make sure that the fuel valves are open.
- Open the valves for the engine cooling systems.
(see chapter MOTORIZATION).
To start the engines, refer to the manufacturer's manual too.
zSTARTING THE ENGINE
- Turn on the battery switches located in the port and starboard aft
cabins.
- Disengage the reverse gear (to allow acceleration in neutral).
- Start the engine.
After starting the engine check for cooling water running out of the
exhaust and observe the colour of exhaust gases.
zBATTERY COUPLING (OPTIONAL EXTRA)
In the case of low engine battery power use the battery coupling
function by turning on the coupling handle located in the starboard aft
cabin.
Once the engines have been restarted make sure that the coupling
handle is turned back to its original position.
zNAVIGATION
When using the engine, avoid making noise and wake near other
users.
Respect speed limits.
WARNING
Never switch off the ignition or the electrical system
when the engine is running.

RIGHTING MOMENT
10
NAVIGATION
LAGOON 380
Illustration showing the difference between
the righting moments of a single-hull vessel
and a catamaran of 10m length.
d: distance between centre of buoyancy and centre of
gravity.
RMmax: weight of vessel x d
(RMmax: maximum righting moment)
RRMMmmaaxxssiinnggllee-hhuullll: 10 tonnes x 0.5 meters
:55ttoonnnneess..mmeetteerrss
RRMMmmaaxxccaattaammaarraann: 10 tonnes x 3 meters
:3300ttoonnnneess..mmeetteerrss
CATAMARAN
Weight of vessel: 10 tonnes
SINGLE-HULL
Weight of vessel: 10 tonnes
D = 0.5 meters
D = 3 meters

NAVIGATION
11
NAVIGATION
1
LAGOON 380
Navigation under sail
zBEWARE
A catamaran presents 6 times greater heel resistance than a single-
hull vessel. In terms of ship design we speak of righting moment
(multiplication of the vessel's weight by the transverse distance
between the centre of gravity and the centre of flotation (or
buoyancy).
See illustration opposite.
This fact has real consequences for the handling and sail-trimming of
a catamaran.
The fact that the boat will not heel over could conceal an excessive
sail surface area in use, which could be dangerous for the crew and
the vessel. It is therefore essential to constantly monitor the real
windspeed and to trim the sail area as a priority according to this
speed.
These latter adjustments are valid in calm seas. In rough seas one
should take the precaution of reducing 10% earlier in terms of real
windspeed. Generally speaking, it is essential to constantly look to
relieve the vessel rather than to put it under stress.
One should always look for the sail angle of attack to be headed to the
apparent wind and the sails to be not over-trimmed so that the
airflows leaving the sail are parallel to each other, that is to say they
do not create turbulence behind the sail.
Failure to follow the above recommendations can be dangerous for
the boat and the crew, and the manufacturer cannot be held
responsible in the event of an accident.
zCLOSE HAULED TRIMMING (between 75 and 50° to true wind)
WWiinnddffoorrcceeggiivveenniinnaappppaarreennttwwiinndd
- FFrroomm00ttoo1166kknnoottss: full sail ; main sail traveller 30 cm above the
boat centre, main sail trimmed with a slightly opened leech (boom
centred).
The genoa jib is trimmed to near the spreader, the genoa traveller is
placed so that the angle of the genoa sheet forms a straight line with
the clew and the luff, at 40% of its height.
- FFrroomm1166ttoo2200kknnoottss: full sail; the main sail traveller moves up to
60cm above boat centre, main sail trimmed with a slightly more open
leech (boom still in line: so the sheet will have to be slackened).
- FFrroomm2200ttoo2266kknnoottss: 1 reef, full genoa; the main sail traveller comes
back to 30cm above boat centre.
The genoa traveller does not change position but the sheet is
slackened slightly so that the leech is 20 cm from the spreader.
- FFrroomm2266ttoo3300kknnoottss: 1 reef, 75% of the genoa, the main sail
traveller goes to 60 cm above the boat's centre.
The genoa traveller remains in place or moves slightly forward but it
is adjusted so that the leech acts as a propeller, the upper part
dumping air out in strong wind conditions.
- FFrroomm3300ttoo3366kknnoottss: 2 reefs, 60% of the genoa, the main sail
traveller returns to the 30 cm above centre position, the boom is
slackened to fly 50 cm leeward.
The genoa traveller is moved slightly forward, the adjustment remains
the same.

MAIN SAIL AREA
Main sail high: 47 m2.
Main sail 1 reef: 32,43 m2.
Main sail 2 reefs: 20,21 m2.
SAILS
12
NAVIGATION
LAGOON 380

- FFrroomm3366ttoo4455kknnoottss: 2 reefs, 40% of the genoa. The main sail
traveller is dead centre and the boom veers 1 metre to leeward.
The genoa traveller moves forward slightly, the sheet is slackened to
open wide in strong wind conditions.
- FFrroomm4455ttoo5555kknnoottss: 3 reefs alone (either storm sail or lie to),
traveller in the centre, main sail out by 1meter.
The boat will be more at ease scudding in this weather.
- OOvveerr5555kknnoottss: lie to, drag anchor or, preferably, scud bare poles.
zCLOSE REACHED TRIMMING (between 75 and 130° to true wind)
- FFrroomm00ttoo2233kknnoottss: full sail; the traveller is positioned between 1
meter from centre up to the end of the track depending on the wind
angle, the sheet is slackened so that boom is veering out anything
from 50 cm in calm weather to 2 meters when the wind is forcing.
In every case no more than one batten should be allowed to chafe the
shroud at the fastest speeds.
The genoa jib is slackened so that its average attack angle is head on
to the apparent wind.
- FFrroomm2233ttoo2288kknnoottss: 1 reef, all the genoa. The adjustments are
identical.
- FFrroomm2288ttoo3333kknnoottss: 2 reefs, 80% of the genoa. The adjustments
remain identical.
- FFrroomm3333ttoo3388kknnoottss: 2 reefs, 60% of the genoa. The adjustments
remain identical.
- FFrroomm3388ttoo4455kknnoottss: 3 reefs (or main sail lowered and a little more
genoa), 40% of the genoa. The adjustments remain identical.
- FFrroomm4455ttoo5555kknnoottss: main sail lowered, 40 to 30% of the genoa,
sufficiently trimmed so as not to flap.
- OOvveerr5555kknnoottss: scudding, depending on the sea conditions the
mooring lines can be looped round behind the vessel and attached on
the opposite side to act as a brake.
These indications are given for your information only and are
dependant on outside conditions.
NAVIGATION
13
NAVIGATION
1
LAGOON 380
WARNING
Your boat is designed to sail without the need to
climb onto the roof for any manœuvres.
It is dangerous to climb or stay on the roof
particularly in the event of gybing.
Keep children under close supervision.

14
NAVIGATION
LAGOON 380

zREDUCTION OF SAILS
The boat is fitted with 3 reefs.
Reefs are automatics.
Putting in reefs no.1 and no.2:
1 - Head the boat into the wind.
2 - Haul taut the topping lift.
3 - Slacken the main sail sheet.
4 - Slacken the main sail halyard and then trim reef line no.1 or no.2,
as needed, until the reefing blocks which correspond to the luff and
the main sail leech are a few centimetres from the boom.
5 - Close the line camcleat of the respective reef.
6 - Hoist taut the main sail halyard.
7 - Slacken the topping lift and take in the main sail sheet.
Refer to the running rigging diagram (chapter on RIGGING AND SAILS)
for identification of ropes.
zSAILING WIND ASTERN
- Do not fall off more than 150° to the apparent wind.
- Put the traveller out as far as possible and slacken the sheet slightly.
- Make sure the main sail does not touch the shrouds; the rubbing of
the battens will wear the material and cable very rapidly.
- Keep main sail + jib up to 15 knots speed and put in one reef or
more if the accelerations are sudden and strong or if sea conditions
deteriorate.
NAVIGATION
15
NAVIGATION
1
LAGOON 380
RECOMMENDATION
For safety, the reef line used should always stay on
the winch with 3 turns around the gipsy.
Re-close the camcleat for greater safety.

DECK LAYOUT
16
NAVIGATION
LAGOON 380
1 - Swimming ladder.
2 - Mooring cleat and jackline fastening.
3 - Midship cleat for towing.
4 - Anchor bridle fastening.
22
4
1
3
3
2
2 22
4

NAVIGATION
17
NAVIGATION
1
LAGOON 380
Mooring
A sufficient number of dockside lines of a size suitable for the
environment should be on board for mooring your boat.
- Always manoeuvre your boat using the engine.
- Make allowances for currents and wind when handling your boat.
- Protect your boat properly with suitably sized fenders.
- Always keep the dockside lines clear and stored away.
- Manoeuvre at a reduced speed.
AFTER MOORING
- Protect the dockside lines from chafing with plastic sleeves.
- Allow for tide variations if necessary.
Towing
TOWING
- Tow another boat at a reduced speed and as smoothly as you can.
- Be particularly careful when throwing or catching the towing line (it
may catch on the propeller).
NB: Stability may be reduced when towing a boat.
BEING TOWED
- Keep steering your boat and ensure you stay in the wake of the
towing boat.
Anchoring
As a rule, set the anchor in at least 3 times the water depth.
zPREPARATION OF ANCHORING (illustrations following page)
- Install the bridle by fixing it to the chain plates located at the ends
of the fore beam.
- Put the bridle through the stem bow roller.
- Shackle the bridle to the central cleat during the lowering of the
chain.
zMANUAL ANCHORING
- Point your boat into the wind and at zero speed.
- Release the gypsy brake.
- Pay out the chain while reversing slowly.
- Secure the anchor chain on the bridle.
- Lead out the chain until the bridle becomes taut.
DANGER
Do not try to stop the boat with your foot, your hand
or a boat hook.
RECOMMENDATION
Before anchoring check the depth of water, the
power of the current and the nature of the sea bed.

ANCHORING
18
NAVIGATION
LAGOON 380
WINDLASS CIRCUIT
BREAKER (PORT AFT CABIN)
SHACKLE THE BRIDLE
TO THE CHAIN
FIX THE BRIDLE TO
THE FORWARD BEAM
PASS THE BRIDLE
THROUGH THE BOW ROLLER
WINDLASS
CONTROL