Lagoon SEVENTY 7 Sailboat Review, Specs, and Listings

2017·Lagoon Catamaran
Approximate drawing

Hover a measurement to read its value

Hull Type
Catamaran · twin
Rig
Fractional Sloop
LOA
78.22' · 23.84 m
Disp.
139,658 lbs · 63,348 kg
First year
2017

The Lagoon SEVENTY 7 is the French builder’s largest seriesbuilt sailing catamaran. Production began in 2017, when the 77foot platform opened Lagoon’s fifth generation of cruising multihulls.

Measurements

Dimensions 01

Length Overall
78.22 ft
Length on deck
76.42 ft
Waterline Length
75.62 ft
Beam
36.09 ft
Draft
6.23 ft
Maximum Headroom
6.83 ft
Air Draft
125.33 ft

Construction & hull 02

Construction
Fiberglass (Balsa Core)
Hull Type
Catamaran
Keel Type
Twin
Ballast
—
Displacement
139,658 lbs
Water Capacity
423 gal
Fuel Capacity
740 gal

Rig & sails 03

Rigging Type
Fractional Sloop
Mainsail luff
—
Mainsail foot
—
Foretriangle height
—
Foretriangle base
—
Forestay Length (estimated)
—
Sail Area
3,609 sqft

Calculations 04

Sail Area to Displacement Ratio
21.45
Ballast to Displacement Ratio
—
Displacement to Length Ratio
144.18
Comfort Ratio
23.86
Capsize Screening Ratio
2.78
Hull Speed
11.65 kn

Conceived as a fully customizable vessel, the SEVENTY 7 bridges the gap between high-volume production and the semi-custom superyacht market. It also collected an unusual sweep of honors in its launch year: the Asia Boating Award 2017 for Best Sailing Yacht, the Adriatic Boat of the Year 2017 award for most innovative boats, and Robb Report’s Best of the Best 2017 Sailboat of the Year.

Design and Construction

The SEVENTY 7 measures 23.84 meters overall, with an 11-meter beam. Its design draws on a deep pool of French multihull expertise. VPLP Design and Marc Van Peteghem handled the naval architecture, while Massimo Gino of Italy’s Nauta Design created the interior. Exterior styling is credited to Patrick Le Quément, as reported by boats.com.

Construction was handled by CNB, a division of Groupe Beneteau. According to Multihulls World, CNB brought its superyacht knowledge to the project anchor. The builder describes the result as an example of its savoir-faire, with every living space open to customization so owners can make the boat their own.

Lagoon’s signature vertical windows surround the deckhouse. A wide, mirrored sliding-glass door opens electrically to reveal the cavernous main-deck interior.

Rig, Machinery, and Handling

A 120-foot carbon mast carries a square-top mainsail whose foot sits more than 20 feet above the waterline. The triple-spreader rig proved fairly manageable in testing. Three headsails on hydraulic furlers are offered, while five Harken winches handle sail controls in the working cockpit. The helm stations are set forward and somewhat apart from the main social areas.

Under sail, the SEVENTY 7 will reach 12 knots on a beam reach in a 20-knot breeze. Its approximate cruising speed under power is 9.2 knots.

Standard propulsion comes from a pair of 180 HP diesels, although the first hull was upgraded to 230 HP John Deere engines driving through V-shafts. The builder expects the boat to carry professional crew at all times, whether privately owned or used for charter.

Cockpits and Flybridge

The generous social plan begins with a 430-square-foot aft cockpit, which has seating for 20. In its port-forward corner, a curved staircase leads to the flybridge. A fiberglass hardtop shelters most of the aft lounge and the optional hot tub, while an outdoor galley module serves the crew.

A separate forward cockpit provides two L-shaped settees.

Interior and Accommodations

Inside, the main deck centers on a dining area to port, with a banquette and free-standing chairs for eight. A U-shaped settee sits opposite, and a central bar wraps around the mast. The inside helm carries twin B&G displays. Forward to starboard, the owner has a private saloon.

The semi-custom lower deck can be arranged with three to five cabins, plus crew quarters. Cabins in the port hull can instead become a massage room, theater, playroom, or conference room. A galley and crew dining area complete the working accommodations.

Forward in the starboard hull, the 377-square-foot master stateroom includes a king bed, walk-in closet, desk, sofa, and a head with twin vanities. It also has a folding personal veranda measuring more than 30 square feet. A concealed hydraulic door opens onto a teak beach, giving the suite direct access to the sea.

Known Issues

Testers aboard the first hull found its grey oak Wenge flooring extremely slippery. No other defects or structural concerns appear in the reviewed material.

The Verdict

The SEVENTY 7 is an excellent long-distance cruising boat designed to give everyone aboard personal space. Its size and extensive customization put it in an unusual category: series-built, but with superyacht-grade scale and scope.

VPLP naval architecture, Nauta interiors, and CNB construction deliver a stable, voluminous platform with infrastructure for professional crew throughout. The only reported shortcoming concerns the slippery flooring aboard the debut hull, a practical issue rather than a systemic fault.

Pros

  • Series-built 77-foot catamaran with full semi-custom layout freedom
  • Triple-spreader carbon rig, hydraulically furled headsails, and manageable handling
  • Exceptional social and private accommodations, including a 377-square-foot master suite with a sea-access door
  • Strong launch-year recognition from Asian and European awards

Cons

  • Slippery Wenge flooring noted aboard the first hull
  • Builder anticipates professional crew at all times, limiting its simplicity for owner-operators

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