Nautitech 40 Open – Catamaran
Photo: Bavaria Yachtbau, CC BY-SA 4.0, via Wikimedia Commons

Nautitech · Catamaran

Nautitech 40 Open

The Nautitech 40 Open (called Open 40 in its first years, and sold in the US as the Bavaria Open 40) is an 11.98 m cruising catamaran drawn by Marc Lombard and built by Nautitech in Rochefort, a yard Bavaria Yachts bought in 2014; cockpit and saloon share one level and the two wheels sit far aft on the hulls. 259 were built from 2013 to February 2026 in three generations: the original, the MK2 shown at Cannes in 2017 with a reworked interior, and the 2023 ‘Millésime’, updated again for 2025; the 41 Type S replaced it. The engines changed more than the boat: the boats tested in 2015 had Yanmars of 21 or 29 hp, Bavaria’s pages of 2017 name the Volvo Penta D1-20, and from 2019 the yard lists two 30 hp Volvo Pentas, with 40 hp as an option. Nautitech publishes no owner’s manual online; documents and yard parts come through the dealer or the yard, quoting the hull number.

Manuals & documents

Nautitech publishes no owner’s manual for the 40 Open online: documents and yard parts come through the dealer or the yard, with the hull number. The links go to the yard’s data sheet, brochures and news, to archived pages of Nautitech and of Bavaria from 2013 to 2024, to the specification of the 2026 boats published by the US dealer The Multihull Company, and to magazine tests. We host no documents.

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 21 / 29 hp × 21,2,3,4,5First boats (to about 2015): SAIL’s test of 2015 names 21 hp Yanmars as standard and 29 hp as the option; Cruising World’s 2015 test boat had two 30 hp Yanmars; the yard wrote 2 × 29 hp (2012), 2 × 30 hp (2013 data sheet) and 2 × 21 hp (December 2015)—No builder document names the Yanmar type. Yanmar’s 21 hp and 29 hp saildrive engines of those years are the 3YM20 and the 3YM30, both on the linked page; read the engine plate before ordering parts.
SaildriveYanmar SD20 / SD251,2Yanmar-powered boats: SAIL and Cruising World (2015) write only ‘Yanmar diesels and saildrives’—The type is not named anywhere. The 3YM engines came with the SD20 and, from 2014, the SD25, which shares most of its parts; the linked page covers both. Check the plate on each leg before ordering seals or anodes.
EngineVolvo Penta D1-20 × 26,7,8,9Bavaria years: Bavaria’s model page of February 2017 says ‘Volvo Penta with Saildrive D1-20’, 14 kW / 18 hp; the brochure of November 2017 gives 2 × 15 kW / 2 × 20 hp, the page of July 2019 ‘Volvo Penta D2-20’, 2 × 20 hp; MySailing (2019) names twin 15 kW Volvos as standard—Volvo Penta makes no D2-20; the three-cylinder D1-20 is the 20 hp engine of that range, and the linked D1-30 page covers it.
EngineVolvo Penta 30 hp × 210,11,12,13From 2019: Nautitech’s data sheet of March 2019 says ‘VP D2-30, Saildrive’, 2 × 30 hp; the brochures of 2020, the model pages to 2026 and the 2026 dealer specification say 2 × 30 hp Volvo Penta with saildrive—Volvo Penta makes no D2-30. Its 30 hp class engine of this range is the three-cylinder D1-30 (linked page), but no builder document names it: read the plate before ordering filters, impellers or belts.
EngineVolvo Penta 40 hp × 214,9Option: SAIL’s MK2 test boat (2018) had 40 hp Volvo saildrives, MySailing’s test boat (2019) engines upgraded to 40 hp—The tests name no type; Volvo Penta’s 40 hp sailboat engine of this range is the four-cylinder D2-40 (linked page). Check the plate.
SaildriveVolvo Penta saildrive × 26,10,13,15All Volvo-powered boats: one saildrive per engine; no builder document names the typeVolvo Penta operator’s manual D1-13, D1-20, D1-30, D2-40 (A version), with the 130S saildriveVolvo Penta’s operator’s manual for the D1-20, D1-30 and D2-40 covers them with the 130S saildrive. Read the plate on each leg before buying seals, anodes or oil.
Alternators115 A × 2132026 dealer specification: one alternator per engine, written as ‘115 Ah’—
Propeller3-blade fixed × 213,92026 dealer specification: two three-blade fixed aluminium propellers, make not named—The Australian dealer’s sail-away package of 2019 had folding propellers instead.
WinchesLewmar Evo 45 ST1,2,13,9SAIL 2015: two Lewmar Evo winches at each helm (Cruising World’s 2015 test boat had an electric Lewmar winch by the starboard wheel) · 2026 dealer specification: 3 × Lewmar Evo 45 ST, two-speed, self-tailing, in the cockpit, plus a manual Lewmar winch on the mastLewmar Ocean & EVO winches Parts & service pageMySailing’s 2019 test boat in Australia had Harken self-tailing winches: check what is fitted.
Windlass1000 W13,92026 dealer specification: electric windlass in the bow locker with wired remote, make not named; the Australian dealer’s 2019 package had a remote and a chain counter at the helm—Read the label on the motor below deck before ordering a gypsy or motor parts.
AnchorDelta 20 kg · 60 m × 10 mm13,92026 dealer specification: galvanised Delta anchor with 60 m of 10 mm galvanised chain; a Delta anchor was also in the Australian dealer’s 2019 package—
Mast & riggingVMG · aluminium16,1,13,12First boats: aluminium rig developed by VMG (the yard quotes Voile Magazine; SAIL 2015: ‘VMG aluminum spar’) · 2026 dealer specification: anodised aluminium deck-stepped mast with two spreader sets and anodised boom, maker not named; Signature look: black lacquered mast and boom—
FurlerFacnor LS 18013,172026 dealer specification: Facnor LS 180 furler for the self-tacking solent; on the composite bowsprit a removable FX 4500 code-sail furler with furling line, tack line and Dyneema gennaker halyardFacnor installation manual LS / RX furlers (2026, English and French)Earlier boats: furler makes not named in the builder’s documents.
SailsDacron · Incidence13,92026 dealer specification: square-top full-batten mainsail 65 m² with three reefs, lazy bag and lazy-jacks, and self-tacking solent 28 m² with UV strip, Dacron, by Incidence · MySailing 2019: Dacron sails, mainsail with two reefs—
SteeringGoiot Triak D700 × 210,12,13Twin wheels at the aft ends of the hulls on every version · 2026 dealer specification: Goiot Triak D700 aluminium wheels with black silicone cover and compass, mechanical throttles to starboard, GRP rudders with stainless-steel stocks, emergency tiller—
ChartplotterRaymarine Axiom 9 × 313,1,12Raymarine navigation pack of the US dealer’s 2026 boats: one Axiom 9 at each helm and one at the chart tableRaymarine Axiom Parts & service pageElectronics came in packs: SAIL’s 2015 test boat had Garmin, and Nautitech’s model pages list B&G as partner. Check what is aboard.
InstrumentsRaymarine i70s × 213Raymarine navigation pack of the US dealer’s 2026 boats: one i70s multifunction display at each helmRaymarine i70 & i70s Parts & service page
AutopilotRaymarine p70s13Raymarine navigation pack of the US dealer’s 2026 boats: autopilot with p70s control head—Drive and course computer are not named: check the units aboard before ordering pilot parts.
VHFRaymarine Ray90 · AIS70013Raymarine navigation pack of the US dealer’s 2026 boats: Ray90 VHF at the chart table and AIS700 transponder—
Toilet—132026 dealer specification: manual toilet with sea-water flush in each of the 2 heads, make not named—
FridgeFrigoboat1,2First boats: two fridge drawers by Frigoboat in the galley (SAIL 2015; ‘two-drawer fridge’ in Cruising World 2015), a small cockpit fridge as an optionFrigoboat / Frigomatic refrigeration Parts & service page
Fridge130 l + 65 l · 12 V132026 dealer specification: 130 l fridge at the front of the galley and a 65 l fridge in the cockpit, makes not named—
StoveENO13,7,1,22026 dealer specification: ENO three-burner gas hob and ENO gas oven · Bavaria brochure 2017: oven and three-ring gas hob · 2015 tests: Eno hob (SAIL), two burners and oven (Cruising World)—
Water heater40 l132026 dealer specification: 40 l boiler in the port engine room, 1200 W on 110 V or 500 W on 230 V—
Bilge pump—132026 dealer specification: electric and manual bilge pumps in both hulls and an electric pump in each engine room, makes not named—
Batteries12 V · 2 × 95 Ah AGM + 4 × 140 Ah132026 dealer specification: two 95 Ah AGM engine batteries and four 140 Ah service batteries—
ChargerCristec 16 A132026 dealer specification: a 16 A Cristec charger listed with the two engine batteries; the Victron MultiPlus has its own 80 A charger—
InverterVictron MultiPlus 2 kW · 80 A132026 dealer specification: Victron MultiPlus inverter-charger, 230 V or 110 V—
Shore power32 A / 230 V · 50 A / 110 V132026 dealer specification: shore-power inlet with a galvanic isolator to starboard—
DavitsGRP / carbon7,12,13Optional on the Bavaria-era boats (brochure of November 2017) · Millésime 2025: black GRP davits as standard, ‘glass/carbon fiber’ in the 2026 dealer specification—
Hatches & portsGoiot18,12,13Escape hatches by Goiot in the inner sides of the hulls on boats built from August 2014 to 2018 (recall, see below) · Millésime 2025: Goiot Magic deck hatches, eight on the 2026 dealer boats, with blinds and mosquito screens—
GeneratorFischer Panda1SAIL 2015: a small Fischer Panda generator as an option in the forward starboard cabin; model not named—
Air conditioning—14SAIL’s MK2 test boat (2018) had air conditioning for the saloon; make not named—
Remote monitoringSailsense13,192026 dealer specification: ‘Sail sense monitoring’, the connected-boat system Nautitech chose for the 44 Open in 2022—

Specifications

Length overall11.98 m (39′4″) in every builder document from 2013 to 2024; the first data sheet of 2013 rounds to 12 m4,20,10,7,12
Waterline length11.94 m (39′2″) from the December 2014 brochure on; the announcement page of 2012 gave 11.50 m20,10,12,3
Beam6.91 m (22′8″) from the 2013 data sheet on; the announcement page of 2012 gave 6.50 m4,10,12,3
Draft1.35 m (4′5″)4,10,12
KeelTwo fixed keels in GRP, laminated and bonded to the hulls13,1
DisplacementLight 7.8 t on the 2013 data sheet and in the Bavaria brochure of December 2014 (11.8 t loaded in 2013); about 8.5 t (18,739 lb) on the yard pages from December 2015 and in every later document4,20,5,10,12
Sail area91 m² upwind (mainsail and self-tacking jib) on the yard pages of 2015 and 2017 and in the December 2014 brochure5,21,20
Mainsail63 m² (678 sq ft) full-batten in every builder document; the 2026 dealer specification gives a 65 m² square-top mainsail with three reefs4,10,12,13
GenoaSelf-tacking jib (solent) 28 m² (301 sq ft), standard on every version4,10,12
Gennaker / Code 0Gennaker 69 m² (2013 data sheet and the table of the December 2014 brochure; 70 m² in that brochure’s text and in Multihulls World 2023); Code 0 44 m² (December 2014 brochure)4,20,22
Light-air sailsSpinnaker 110 m² in the table of the December 2014 brochure (95 m² in its text); storm jib 15 m²20
Air draftAbout 20.05 m (65′9″) above the waterline, from the 2013 data sheet to the 2024 page; the yard’s web pages up to December 2015 said ‘Hauteur mât 18 m’ without saying what was measured4,10,12,5
Fuel tank2 × 150 l on the 2013 data sheet; 2 × 215 l (2 × 57 US gal) from the December 2014 brochure to the brochure of January 2020; 2 × 200 l (2 × 53 US gal) from the brochure of August 20204,20,23,11,12
Water tank2 × 240 l on the 2013 data sheet; 2 × 215 l from December 2014 to January 2020; 2 × 300 l (2 × 79 US gal) from the brochure of August 20204,20,23,11,12
Holding tank2 × 44 l, aluminium, with gauges (2026 dealer specification); Cruising World gives 2 × 45 l in 201513,2
Engine options2 × 21 hp Yanmar standard, 2 × 29 hp Yanmar option (SAIL, 2015) · 2 × Volvo Penta D1-20, 14 kW / 18 hp (Bavaria’s page of 2017; 2 × 20 hp in the brochure of November 2017) · 2 × 30 hp Volvo Penta (Nautitech data sheet of March 2019 and every later document) · 2 × 40 hp Volvo as an option (the test boats of SAIL and MySailing, 2018/2019)1,6,7,10,12,14,9
Cabins3 (owner’s version: the whole port hull is the owner’s suite) or 4, always with 2 heads10,12,1
Berths6 or 8, plus 2 in the bow peaks (Bavaria’s page of 2019: 6 (+1) or 8 (+2))20,8,10
Berth sizesAft cabins 160 × 200 cm, forward cabins 150 × 195 cm (2026 dealer specification)13
Headroom1.90 m (yard pages 2012 to 2017)3,5,21
CE categoryA, 10 people (yard pages of 2015 and 2017)5,21
HullVacuum-infused glass sandwich with PVC foam core; solid laminate below the waterline, cored above (SAIL and Cruising World, 2015); Bavaria calls the process VacuTec4,1,2,7
DesignerMarc Lombard (Marc Lombard Yacht Design Group); interior: Roseo Design in the documents of 2013 to 2019, Nautitech Catamarans on the 2024 page4,10,12,24
BuilderNautitech Catamarans, Rochefort, France; owned by Bavaria Yachts since 2014, with the joinery made at Bavaria’s plant in Giebelstadt from 2015; in court-supervised restructuring since August 202620,25,7,26
Years built2013 to February 2026: announced for the Grand Pavois in La Rochelle (2012 page), launched in 2013 according to the yard, press launch with three boats in March 2014; the end of production was marked at the yard on 11 February 20263,27,24
Hulls built259 (hull 259 was the last); the 200th was celebrated at the yard in October 202124,28
VersionsFirst generation ‘Open 40’ (2013–2017; Bavaria Open 40 in the US) · MK2 ‘40 Open’, shown at Cannes in September 2017: reworked interior and galley, larger hull windows, joinery from Bavaria · third generation ‘Millésime’, shown at La Grande-Motte in April 2023: white coachroof, black davits and handrails, bleached oak with black leather inside1,29,14,9,22,30
VersionsMillésime 2025: a ‘ready to sail’ standard with black GRP davits, Goiot cleats and Magic deck hatches, a GRP bowsprit, flush windscreen glazing and upgraded running rigging; the Signature look adds a black mast and boom, a white forward crossbeam, black trampolines and black Triak wheels12
AwardsCruising World Boat of the Year 2016 (Best Multihull Cruiser); SAIL Best Boats 2016 (cruising multihulls 31–40 ft)31,32,33
SuccessorNautitech 41 Type S24,34

Good to know

  • Goiot recalled the escape hatches in the inner sides of the hulls that it delivered before September 2018, because the glazing could come away from the frame. Nautitech says the 40 Open built between August 2014 and 2018 is concerned: ask the dealer or the yard, with the hull number, whether the hatches on the boat were dealt with.18,35
  • Read the engine plates before ordering parts. Depending on the year the boat has Yanmars (21 or 29 hp on the 2015 test boats), Volvo Penta D1-20s (Bavaria, 2017) or 30 hp Volvo Pentas (from the 2019 data sheet), and 40 hp was an option. Don’t trust the builder’s type names: Bavaria’s page of July 2019 says ‘D2-20’ and Nautitech’s 2019 sheet ‘VP D2-30’, types Volvo Penta does not make.1,6,8,10,14
  • Tank sizes changed in 2020: Nautitech’s brochure of January 2020 still gives 2 × 215 l of fuel and water, the August 2020 brochure 2 × 200 l of fuel and 2 × 300 l of water; the first data sheet of 2013 had 2 × 150 l and 2 × 240 l. For senders, hoses or fittings, measure the tank aboard.23,11,4
  • The mast top is about 20 m above the water (20.05 m, 65′9″, by the builder’s figures). SAIL points out that this makes the US Intracoastal Waterway awkward, where several fixed bridges clear less than 65 ft at high tide.10,14
  • Navigation electronics depended on the pack the first owner ordered: SAIL’s 2015 test boat had Garmin, Nautitech’s model pages list B&G as partner, and the US dealer’s 2026 boats carry a Raymarine pack (Axiom 9, i70s, p70s). Check what is aboard before ordering transducers, displays or pilot parts.1,12,13
  • Since August 2026 Nautitech has been in court-supervised restructuring; the yard says production, deliveries and after-sales service continue. Parts for the bought-in equipment (Volvo Penta, Lewmar, Facnor, Raymarine) are also available through those makers’ own dealers, independently of the yard.26

Videos & how-tos

Links to YouTube, nothing embedded. The maker’s own channel comes first; the rest are channels we found clear and correct for this model.

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Sources

  1. sailmagazine.com/boats/bavaria-open-40/
  2. cruisingworld.com/sailboats/nautitech-open-40/
  3. web.archive.org/web/20121105061112/http://www.nautitech.fr/modele-nautitech_open_40-1.html
  4. web.archive.org/web/20131102072552/http://www.nautitech.fr/media/broch_open_40_focusc__04…
  5. web.archive.org/web/20151222230453/http://www.nautitech.fr/nautitech-open-40/caracteristi…
  6. web.archive.org/web/20170203152916/http://www.bavariayachts.com/en-uk/catamarans/nautitec…
  7. web.archive.org/web/20190411165603/https://www.bavariayachts.com/fileadmin/media/global/s…
  8. web.archive.org/web/20190717112743/https://www.bavariayachts.com/en-uk/catamarans/nautite…
  9. mysailing.com.au/nautitech-40-moving-on-up/
  10. nautitechcatamarans.com/sites/default/files/media/boats/files/NAUTITECH_40_open_EN.pdf
  11. nautitechcatamarans.com/sites/default/files/media/boats/files/Plaquette_40_Open_EN_0.pdf
  12. web.archive.org/web/20241212234633/https://www.nautitechcatamarans.com/en/catamarans/40-o…
  13. multihullcompany.com/boat/nautitech-40-open-10228155/
  14. sailmagazine.com/boats/boat-review-bavaria-nautitech-40-open/
  15. pubs.volvopenta.com/publications/7745857
  16. web.archive.org/web/20160302205610/http://www.nautitech.fr/nautitech-open-40/atouts/
  17. facnor.fr/ftpfacnor/Notices/ENLSLXRX/ENLSRX_NT_2916004000.pdf
  18. nautitechcatamarans.com/en/recall-goiot-escape-hatches
  19. nautitechcatamarans.com/en/nautitech-has-chosen-sailsense-analytics
  20. web.archive.org/web/20160909161109/http://www.nautitech.fr/media/nautitech_open_40_fr_en_…
  21. web.archive.org/web/20170702165317/http://www.nautitech.fr/nautitech-40-open/caracteristi…
  22. multihulls-world.com/actualites-catamaran-trimaran/nautitech-40-open-the-third-vintage
  23. nautitechcatamarans.com/sites/default/files/media/boats/files/Plaquette_40_Open_EN.pdf
  24. nautitechcatamarans.com/en/nautitech-40-open-end-production-iconic-model
  25. actunautique.com/2015/04/nautitech-une-meilleure-qualite-par-de-meilleurs-achats-depuis-l…
  26. multihulls-world.com/actualites-catamaran-trimaran/nautitech-enters-court-supervised-rest…
  27. web.archive.org/web/20140518160407/http://www.nautitech.fr/actualites/actualites/382-avan…
  28. youtube.com/watch?v=kXvhg14OUF8
  29. multihulls-world.com/review/catamaran/nautitech-40-open-mk2-restyling-a-commercial-success
  30. nautitechcatamarans.com/en/scandinavian-premiere-see-nautitech-40-open-orust-sailboat-sho…
  31. cruisingworld.com/best-multihull-cruiser
  32. web.archive.org/web/20160302210204/http://www.nautitech.fr/actualites/actualites/543-naut…
  33. web.archive.org/web/20160302204640/http://www.nautitech.fr/actualites/actualites/545-best…
  34. multihulls-world.com/review/catamaran/nautitech-40-open-three-generations-one-philosophy
  35. nautitechcatamarans.com/sites/default/files/media/files/Press%20release%20-%20Goiot%20esc…

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