Lagoon 450 – Catamaran
Photo: _dChris, CC BY 2.0, via Flickr (cropped)

Lagoon · Catamaran

Lagoon 450

The Lagoon 450 is a 13.96 m cruising catamaran designed by VPLP (Marc Van Peteghem and Vincent Lauriot-Prévost), with interiors by Nauta Design, and built by Lagoon (CNB, Groupe Beneteau) in Bordeaux with infused hulls and deck. Presented in 2010 to replace the Lagoon 440, it kept the flybridge helm reached from both sides of the cockpit and the forward cockpit, as an owner’s version with three cabins or with four cabins. From 2015 the flybridge boat was sold as the 450 F alongside the 450 S SporTop, which has its helm on the aft coachroof bulkhead. In 2021 the Lagoon 46 replaced the model, after nearly 800 boats.

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 4JH45 × 21,2,3450 F and 450 S from 2015 (Lagoon inventories, September 2015): 45 hp common rail with saildrive, option up to 2 × 57 hp; Lagoon’s current pages give 2 × 57 hpYanmar JH operation manual, 4JH45 and 4JH57The 450 S owner’s manual shows the engine room in a Yanmar and a Volvo version, so some boats may have Volvo engines (model not named). Two-blade fixed propellers as standard. Yanmar’s JH manual also covers the 57 hp 4JH57.
Engine2 × 40 hp4,5Lagoon 450, 2010–2014 (spec sheet 2012, French user guide): diesel with saildrive—Lagoon’s documents of these years do not name the engine make; the French user guide leaves it blank for the owner to fill in. Read the engine plate before ordering filters, impellers or belts.
WindlassQuick 12 V 1700 W4,1,6,3All years: vertical windlass in the anchor locker with a 12 mm gypsy (2012 sheet; wireless remote in the 2015 inventories); Lagoon’s anchor-package sheet of February 2015 names Quick—Quick’s model name is not given. The windlass only runs with an engine running (interlock relay); US boats have a 1/2″ gypsy.
AnchorDelta 25 kg6Lagoon anchor package, February 2015—With 85 m of 12 mm chain, 22 m of 22 mm rope and a bridle of two 16 mm lines of 6.20 m with shackle.
Winches60.2 STA × 31,2450 F and 450 S, Lagoon inventories of September 2015: three manual winchesHarken Radial 46.2 ST installation and maintenance manualLagoon gives the size in Harken’s Radial designation (two-speed, self-tailing, aluminium drum) but does not name the maker; check the winches aboard before ordering spares.
Winches2 × 60 + 2 × 504Lagoon 450, spec sheet 2012: size 60 at the helm (main halyard, reefs, genoa) and for the genoa to port; size 50 for the genoa halyard, spinnaker and topping lift, and for the mainsheet and traveller—Maker not named in the 2012 documents.
Batteries2 × 110 Ah + 3 × 140 Ah · 12 V4,1,5Two engine starting batteries and a service bank of three, all years (2012 sheet, 2015 inventories); two 12 V 80 A alternators—Options: three more 140 Ah service batteries and a 110 Ah generator battery. A coupling switch lets you start an engine from the other battery.
Charger12 V · 60 A5Lagoon 450, French user guide: 110–220 V charger for service and engine batteries; depending on the finish a second 40 A charger—The chargers sit in the starboard engine compartment; a 12 V to 110–220 V inverter was an option.
Generator—4,1,5,3Option, all years: locker in the forward cockpit (starboard per the 2012 sheet and the French user guide; under the port seat in the 2015 inventory)—Maker not named. It has its own 110 Ah starting battery, seawater intake and exhaust.
Fridge12 V · 130 l4,1,5Front-opening galley fridge, all years; options: a second 130 l fridge or a 110 l freezer in the saloon and an 80 l cockpit fridge (French user guide)—
Water heater60 l · 220 V4,1,5All years (2012 sheet, 2015 inventories): electric and heated by the engine through an exchanger—In the aft port cabin (French user guide); US boats have a 110 V element. Fresh water comes from one main water pump unit in the port companionway.
Toilet—4,1,3Manual marine toilet in every head (2012 sheet, 2015 inventories); the 450 S owner’s manual lists electric toilets in the port forward, port aft and starboard aft heads—Maker not named. Holding tanks: see the specifications.
Bilge pump32 · 125 · 20 l/min4,1,3,5Per hull, all years: a manual pump worked from the cockpit (32 l/min), an automatic submersible electric pump (125 l/min) and a non-submersible electric pump with a manual switch (20 l/min)—Flow rates from the 450 S owner’s manual. Lagoon advises testing the bilge pumps before every trip and leaving the automatic ones switched on.
Steering—3,4All years: cable steering with wheel; flybridge helm (450, 450 F) or helm on the coachroof bulkhead (450 S)—Have a professional inspect the system once a year; check the cable tension regularly, grease the chains and sprockets, but never the cables or sheaves.

Specifications

Length overall13.96 m (45′10″); 14.45 m with the spinnaker pole7,3
Waterline length13.38 m (43′11″)4,1
Beam7.84 m (2012 spec sheet); 7.87 m in the 2015 inventories and the owner’s manual4,1,3
Draft1.30 m (1.305 m on the 2012 sheet); 1.31 m fully laden (owner’s manual)7,4,3
Displacement15.5 t light (EC, 2012 spec sheet); 15.1 t (450 F) and 15.0 t (450 S) in the 2015 inventories; 450 S owner’s manual: 14917 kg light, 20032 kg with maximum load (category A); the French user guide of the early boats gives 16900 kg light4,2,1,3,5
Air draft23.05 m (75′8″) for the 450 and 450 F; 450 S: 22.33 m (73′3″) on Lagoon’s current page, but 23.05 m in the 450 S owner’s manual4,7,8,3
Sail area134 m² upwind (brochure 2014); 130 m² in the 2015 inventories; Lagoon’s current pages: 128 m² (450 F), 130 m² (450 S). Rig (450 S owner’s manual): I 16.84 m, J 4.70 m, P 17.65 m, E 6.63 m9,1,2,7,8,3
Mainsail82.5 m² full-batten, square top 85 m² option (2012 sheet); 79 m², square top 81 m² option (2015 inventories); 450 S owner’s manual: 79 m², square top 86 m²4,1,3
Genoa51.8 m² furling genoa (2012 sheet); 51 m² (2015 inventories); 50 m² (450 S owner’s manual); Code 0 option 93 m²4,1,3
Engine2 × 40 hp (2010–2014); from 2015 2 × 45 hp common rail as standard, up to 2 × 57 hp; Lagoon’s current pages: 2 × 57 hp. Owner’s manual: at most 2 × 41.9 kW at the propeller4,5,1,7,3
Fuel tank2 × 500 l, aluminium tanks (2012 sheet); 2 × 520 l (2015 inventories, owner’s manual)4,1,3
Water tank2 × 175 l (350 l); option: another 2 × 175 l3,5
Holding tank80 l in the aft port head on European boats (2012 sheet, 2015 inventories); one per head on US boats and in the 450 S owner’s manual4,1,3
Cabins3 (owner’s version: the whole starboard hull for the owner) or 4, each with its own bathroom and separate shower; Lagoon’s current 450 F page also lists 5- and 6-cabin layouts10,4,7
Berths6 to 127,1
CE categoryA (12 people), B (14), C (20), D (30)4,7,3
HullPolyester with anti-osmosis resin, hull and deck infused; balsa-core hulls with solid laminate below the waterline; balsa-core bridgedeck and deck4,3
DesignerMarc Van Peteghem & Vincent Lauriot-Prévost (VPLP); interior: Nauta Design4
BuilderC.N.B. (Lagoon), Bordeaux, France3,4
VersionsLagoon 450 (2010–2014, flybridge; at launch with Essential, Cruising and Comfort equipment packs); from 2015 the 450 F (flybridge) and the 450 S SporTop (helm on the coachroof bulkhead)10,11,7,8
Years built2010–202110,12
Hulls builtnearly 800 (Lagoon news page of February 2021, quoting SAIL Magazine)12

Good to know

  • Forward bulkhead: Lagoon reported in 2021 that on a fair number of 450s the side parts of the forward bulkhead, next to the cabin doors, buckle or crack. Lagoon and VPLP say this is not a safety issue but recommend reinforcing or repairing it: a Lagoon dealer or service centre inspects it (about 4 hours, paid by Lagoon), and Lagoon supplies a repair kit and a procedure for the boat. Boats after hull 36 (2012) got extra stiffeners at the factory. Have it checked at a survey.13,14
  • Rig tuning depends on the hull number: 450 F up to hull 294 have lower shrouds, from hull 295 a front diamond instead. Lagoon’s dock-tune table gives 16 mm cap shrouds, 12 mm diamonds, 150 mm mast pre-bend and the minimum and maximum load for each wire.15
  • Before ordering engine parts, read the engine plate: Lagoon’s documents for 2010–2014 boats only say 2 × 40 hp with saildrive, the 2015 inventories name the Yanmar 4JH45 (57 hp option), and the owner’s manual also shows a Volvo installation.4,1,3
  • With the standard fixed propellers, leave both gear levers in neutral when sailing faster than 8 knots. At every haul-out check that the propellers turn freely without play. Check the anodes, including those on the saildrives, at least twice a year, replace any before it has lost half its weight, and renew them all every year.3
  • The windlass only runs with an engine running, because its interlock relay is fed by the alternator. If the port engine has failed, switch on its ignition only: the windlass then works from the service batteries while the engine alarm sounds.3
  • 450s built up to 2019 with fixed Goiot emergency hatches in the hulls fall under Lagoon’s recall for catamarans built 2007–2019: retaining brackets that hold the glass if it comes loose. Goiot now also says these hatches must be replaced once they are 10 years old, kit or not. Ask a Lagoon dealer or service centre, quoting the HIN.16

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Sources

  1. web.archive.org/web/20151122070515/http://www.cata-lagoon.com/documentation/pdf/specs_LAG…
  2. web.archive.org/web/20160126002021/http://www.cata-lagoon.com/documentation/pdf/specs_LAG…
  3. emailing.catamarans-lagoon.com/Lagoon_450S_owner_manual.pdf
  4. web.archive.org/web/20140317041255/http://www.cata-lagoon.com/documentation/pdf/spec_l450…
  5. web.archive.org/web/20151106074803/http://www.cata-lagoon.com/documentation/pdf/user_guid…
  6. web.archive.org/web/20151106031728/http://www.cata-lagoon.com/documentation/pdf/anchor_ki…
  7. catamarans-lagoon.com/boats/lagoon-450f
  8. catamarans-lagoon.com/boats/lagoon-450s
  9. web.archive.org/web/20150109181547/http://www.cata-lagoon.com/documentation/pdf/Lagoon450…
  10. web.archive.org/web/20101213155852/http://www.cata-lagoon.com/450_pres_uk.php
  11. web.archive.org/web/20151001044121/http://www.cata-lagoon.com/documentation/pdf/brochure_…
  12. catamarans-lagoon.com/news/article/lagoon-46-sail-magazine
  13. catamarans-lagoon.com/support
  14. admin.catamarans-lagoon.com/sites/default/files/2023-10/VPLP%20MARVIN-%20Lagoon%20450.pdf
  15. admin.catamarans-lagoon.com/sites/default/files/2023-10/Dock%20Tune%20Lagoon%20450.pdf
  16. catamarans-lagoon.com/news/article/recall-goiot-products

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