Lagoon 380 – Catamaran
Photo: Luissilveira, CC BY-SA 3.0, via Wikimedia Commons (cropped)

Lagoon · Catamaran

Lagoon 380

The Lagoon 380 is an 11.55 m cruising catamaran designed by VPLP (Marc Van Peteghem and Vincent Lauriot-Prévost), with an interior by Xavier Faÿ, and built by Lagoon in Bordeaux from 1999. Long the smallest Lagoon, it was by Lagoon’s count the world’s best-selling liveaboard multihull for many years, and its vertical windows set the style for later models such as the Lagoon 470 and 570. This page covers the original 380 and the 380 S2 (listed under that name on Lagoon’s website by 2005). Both came as an owner’s version with 3 cabins or a charter version with 4, with two saildrive diesels of 18 to 21 hp as standard.

Manuals & documents

The links go to Lagoon’s own documents — some as archived copies of pages the maker has since taken down. We host no manuals or drawings.

Equipment & its manuals

Standard equipment as the builder’s documents list it. Boats were ordered with options and refitted since — check what is actually aboard.

ItemModelManual / pageNote
EngineYanmar 3YM20 × 21Standard in the September 2015 inventory: 21 hp each, saildrive; options up to 2 × 30 hpYanmar operation manual YM series (2YM15, 3YM20, 3YM30AE), 2025Lagoon does not name the engine of the 30 hp option, so check the type plate. Mechanical throttles at the helm; the engine rooms behind the transom hatches have natural and forced ventilation.
EngineDiesel × 22,3,4Lagoon documents of 2010 to 2014 (website 2010, user guide 02/2010, spec sheet 01/2012): 20 hp each, saildrive; maker not named—Dual-lever engine control at the helm, raw-water filter, fuel filter with water separator and engine blower (2012 sheet).
EngineYanmar × 25,6Lagoon pages of 2000 and 2005: Yanmar saildrive engines (“SD”) of 18 hp each; no engine model given—Lagoon’s 2000 page places the engines in the transom steps.
SaildriveYanmar SD × 25,4All years; Lagoon gives no leg type, so check the plate on each legYanmar operation manual SD20 / SD50 / SD50-4T saildrives, March 2009Lagoon’s user guide: replace the leg anodes before they are half worn, make sure they have good metal contact with the drive and never paint them. Yanmar’s manual covers the SD20 and SD50 legs.
Propeller2-blade fixed (folding: option)1,42-blade fixed propellers in the 2015 inventory; folding propellers optional (user guide 2010)—Lagoon chose the standard propellers in trials with the engine maker and advises against changing them without a specialist. Take folding propellers off after each season, clean and grease them, and check that the blades move freely.
Winches44.2 STC + 40.2 STC; 46.2 STA + 40.2 STA (2015)3,1Spec sheet 01/2012: genoa winch 44.2 STC and halyard winch 40.2 STC; September 2015 inventory: 46.2 STA for the genoa sheet and 40.2 STA for the halyardsHarken Radial 46.2 ST installation and maintenance manualOnly two winches as standard, both on the port side of the coachroof by the helm. Lagoon gives the sizes in Harken’s code format without naming the maker, so check the drum before ordering parts.
WindlassQuick Hector 1000 W, 12 V7,3,1,4Named in Lagoon’s anchor package sheet of 02/2015; the 2012 spec sheet gives only 12 V/1000 W, the 2015 inventory a horizontal gypsy for 10 mm chainQuick Hector 700/1000/1500 W (HC3) user’s manual, rev. 08A (multilingual)Gypsy for 10 mm and 3/8″ chain plus rope; US-spec boats have an inch gypsy. Lagoon’s user guide: anchor with the port engine running, motor up to the anchor instead of winching the boat, use a winch handle on the windlass if the power fails, and rinse it with fresh water after every trip.
AnchorDelta 20 kg · 75 m × 10 mm · 48 m × 18 mm7Lagoon anchor package, 02/2015: 75 m of 10 mm (3/8″) chain and 48 m of 18 mm rope—Bridle of 2 × 6.20 m, 16 mm, with an 8 mm high-resistance shackle; 4 mooring lines of 12 m, 16 mm.
ToiletManual marine head × 23,1,4Spec sheet 01/2012 and September 2015 inventory (“full-size”/“big size” manual toilet); maker not named—The port toilet drains to the 80 l holding tank with deck pump-out; a tank for the starboard toilet was optional, otherwise it discharges through a seacock. US-spec boats have a holding tank in each head.
Fridge12 V, 190 l (2012) / 184 l (2015)3,1Spec sheet 01/2012 and September 2015 inventory; maker not named—
StoveGas, 3 burners + oven3,1,53 burners and an enamelled oven in 2012 and 2015; the original 380 (2000) had 2 burners and an oven—Gas locker in the cockpit, for two 10 kg bottles (2015). US-spec boats have a propane system.
Water pump12 V pressure pump3,1Spec sheet 01/2012 and September 2015 inventory; maker not named—One main pump group in the forward port cabin. Shower and basin water runs to a grey-water sump with an automatic pump; cold deck shower on the port transom.
Water heater22 l, 220 V + engine heat exchanger3,1Spec sheet 01/2012 and September 2015 inventory (heated by the starboard engine)—US-spec boats have a 110 V heating element.
Bilge pump12 V automatic + manual3,1,42012: 2 automatic 12 V pumps and 2 manual pumps; 2015: 1 automatic pump in each hull and 1 manual pump in the aft cockpit—Each hull has a main sump; the automatic pump sits in the head cabinet. The forward compartments and engine rooms are watertight, with valved drains to the sumps that stay closed in normal use.
Batteries12 V: 2 engine + 2 house3,1,42012: 2 × 70 Ah engine and 2 × 140 Ah house batteries; 2015: 2 × 110 Ah start and 2 × 140 Ah service batteries, two 80 A alternators—Battery breaker under the berth of the aft starboard cabin (2015). The optional coupling lever in that cabin lets one engine battery help start the other engine.
SteeringCable, wheel with brake, emergency tiller3,4,5Spec sheet 01/2012; helm station on the port side behind the coachroof since 1999—Rudders and rudder stocks in glass/epoxy. The steering gear is reached through the engine compartment.
Mast & riggingAluminium, deck-stepped, single spreaders3,4Anodised aluminium mast of 15 m on the coachroof (2012 sheet); the user guide gives 15.45 m for European boats—Boom 3.40 m; I 13.13 m, J 3.57 m, P 13.65 m, E 5.40 m (user guide). Two hull-mounted shroud chainplates, forestay chainplate on the crossbeam, lazy-jacks.

Specifications

Years builtFrom 1999; Lagoon now lists the 380 among its earlier models (Lagoon Heritage)8
Versions380 (1999) and 380 S2 (“380S2” on Lagoon’s 2005 website, later simply “380” again); owner’s version with 3 cabins or charter version with 4; “Infinity” special edition (2015) with a composite bimini carrying three 120 W solar panels8,6,2,3,9
Hulls builtClose to 700 by September 2014 (Lagoon brochure)10
DesignerMarc Van Peteghem & Vincent Lauriot-Prévost (VPLP); interior Xavier Faÿ3,5
BuilderLagoon, Bordeaux (France), part of Groupe Beneteau1,10
Length overall11.55 m (37’11″)3,8
Waterline length11.00 m (36’1″)3,4
Beam6.53 m (21’5″)3,8
Draft1.15 m (3’9″); Lagoon’s 2000 page gave 1.20 m for the original 3803,8,5
Displacement7.26 t light (CE); 10.46 t maximum laden, 3.2 t maximum load (user guide 2010); 5.9 t on Lagoon’s 2000 page8,4,5
Air draft17.32 m above the waterline (56’10″); the user guide gives 17.35 m3,4
Bridgedeck clearance0.72 m from the waterline to the underside of the bridgedeck4
Sail area77 m² upwind (47 m² mainsail + 30 m² genoa); original 380 (2000): 51 m² mainsail + 34 m² jib8,1,5
Mainsail47 m² full-batten (506 sq ft); 32.4 m² with 1 reef, 20.2 m² with 2 reefs; 52 m² square-top mainsail as an option3,4,1
Genoa30 m² furling genoa (323 sq ft); gennaker of 52–53 m² as an option3,4,1
Engine2 × 18 hp (Lagoon pages 2000 and 2005), 2 × 20 hp (2010–2014 documents), 2 × 21 hp standard with options up to 2 × 30 hp (2015)5,6,2,3,1
Fuel tank2 × 100 l (2 × 26 US gal)3,1
Water tank300 l (79 US gal)3,8
Holding tank80 l in the port hull, gravity drain and deck pump-out; a starboard tank was optional, US-spec boats have one in each head1,3,4
Cabins3 (owner’s version: the whole starboard hull for the owner, with a large head forward and a separate shower) or 4 (charter version); 2 heads in both3,5
Berths6 to 8 (2015 inventory); Lagoon’s heritage page says 6 to 121,8
HullPolyester with anti-osmosis resin; sandwich hulls (foam core in the 2012 sheet, balsa core and infusion in 2015) with solid laminate below the waterline; balsa-cored deck and bridgedeck; laminated plywood bulkheads3,1
CE categoryA: 8 people, B: 10, C: 12 (D: 14 in the user guide)3,4

Good to know

  • Lagoon no longer offers the 380’s owner’s manual as a download. If your dealer cannot supply it for your hull, Lagoon sends the PDF on request to info@catamarans-lagoon.com.11
  • Check which engines a used 380 really has before ordering parts: Lagoon quoted 2 × 18 hp Yanmar saildrives in 2000 and 2005, 2 × 20 hp in the 2010–2014 documents and Yanmar 3YM20 with 21 hp from 2015, with options up to 30 hp. The type plate decides which filters and impellers fit.5,6,2,1
  • Lagoon catamarans built between 2007 and 2019 with fixed Goiot emergency hatches fall under a recall: a retaining kit is fitted, and Goiot now advises replacing these hatches every 10 years, kit or not. Contact a Lagoon dealer or service centre with the model and HIN.12
  • At haul-out, renew the hull and saildrive anodes before they are half worn, check their metal contact and never paint them; check that the propeller blades move freely and refit folding propellers before launching.4
  • For the yard or road transport: the hull centrelines are 4.50 m apart, the boat stands 4.08 m high on its keels without the mast, and the mast is 15.45 m long with a 3.40 m boom.4
  • Lagoon’s reefing guide for the 380, in apparent wind: upwind take the first reef at 20 knots and the second, with 60 % of the genoa, at 30 knots; off the wind the first at 23 and the second at 28 knots. The mainsail shrinks to 32.4 m² with one reef and 20.2 m² with two.4

On the marketplace

Looking for a part for the Lagoon 380? Post a wanted ad in the app — it is free, it sits on the live map, and boaters nearby who have the part aboard can answer.

Got spares you no longer need? List them in a minute. No commission, ever.

Get the app

Sources

  1. web.archive.org/web/20151221093923/http://www.cata-lagoon.com/documentation/pdf/specs_LAG…
  2. web.archive.org/web/20101005061728/http://www.cata-lagoon.com/380_specs_uk.php
  3. web.archive.org/web/20131228151510/http://www.cata-lagoon.com/documentation/pdf/spec_l380…
  4. web.archive.org/web/20151106073003/http://www.cata-lagoon.com/documentation/pdf/user_guid…
  5. web.archive.org/web/20000229182349/http://www.cata-lagoon.com/eng/doc/380/380spec_gb.htm
  6. web.archive.org/web/20051204030014/http://www.cata-lagoon.com/380_specs_uk.php
  7. web.archive.org/web/20151106031728/http://www.cata-lagoon.com/documentation/pdf/anchor_ki…
  8. catamarans-lagoon.com/boats/lagoon-380
  9. web.archive.org/web/20150911100105/http://www.cata-lagoon.com/documentation/pdf/brochure_…
  10. web.archive.org/web/20150330104748/http://www.cata-lagoon.com/documentation/pdf/Lagoon380…
  11. help.catamarans-lagoon.com/hc/en-us/articles/7408853722525-Owner-s-manual
  12. catamarans-lagoon.com/news/article/recall-goiot-products

Lagoon is a trademark of its owner; boatparts.app is not affiliated with it. Part numbers are quoted for identification only. Spotted an error? Write to mail@boatparts.app.