Naval architecture

Lagoon catamarans are designed by internationally renowned architects Van Peteghem and Lauriot Prevost (VPLP), world leaders in multihulled yacht design, and the most highly qualified in the world when it comes to multi hull racing boats.

Their unrivalled experience enables them to transfer the fruit of their research to cruising catamarans in a number of areas:


Displacement


Loading capacity
For successful cruising you have to be able to take along everything you need without overloading the boat. VPLP architects and the Lagoon design office pay special attention to this issue. An unladen Lagoon catamaran always floats well above its waterline and the hulls are designed to be just as efficient when the boat is fully laden with water and diesel, food, sailing gear and the personal belongings of the crew. Enjoy unparalleled performance and comfort.

Modern cruising catamarans thus generally carry a lot of equipment and this affects their displacement.

Moreover
European pleasure boat manufacturing isregulated by CE rules that all boat builders have to observe.
Precise norms have been defined in terms of construction (structure) and safety (fire on board, flooding, etc…)
This regulation is also extremely precise concerning the way the specifications and technical characteristics should be presented to European consumers. Lagoon of course strictly follows CE norms in terms of construction, but also in terms of public information.

As an example, it is compulsory under CE norms to indicate a boat's displacement in a ready to sail condition, namely : fuel & water tanks 50% full, crew and crew equipment weight, safety equipment and sails weight etc.

As a consumer, you should make sure that all shipyards follow the rules of the game in this regard.

Although Lagoon always endeavours to reduce structural weight (infusion/sandwich techniques, etc.), significant hull displacement requires the use of fixed keels for several reasons:

Anti-drifting efficiency
Performance: A fin is not only longer and cuts through the water more cleanly, its volume also adds a significant amount of buoyancy to the design and this allows the architect to draw finer lines without affecting displacement.

Grounding
Safety: The ability to hit a reef or run aground, whether voluntarily (beaching or careening) or accidentally, without sustaining hull damage is an undeniable safety factor. In the case of a Lagoon catamaran the keels are totally isolated from the hull so if one gets damaged, the yacht will not sink.

Trimming
Simplicity: As with any moving part of a boat, centreboards require maintenance and a degree of expertise in handling: when should they be raised? On which point of sail? At what depth? None of these questions arises with fin keels.

Draft
Efficiency: The draft of a catamaran is determined by the depth of its rudders so neither version (centreboard or fixed fin) can sail any closer to the beach. On the other hand, unlike a centre boarder, fin keels allow you to sail upwind in shallow waters. Note that for safety reasons fin keels are always a few centimetres deeper than rudders.
Lastly, centreboard catamarans can offer better performance when sailing close-hauled but only if their weight is kept to a minimum. Lagoon has chosen the practical option that best suits our clients' cruising plans.



Hull shapes


The symmetrical hulls of Lagoon catamarans cut cleanly through the water to ensure an identical flow rate on either side. Today, VPLP is the benchmark in hull design thanks to the experience gained from being the dominant force in multihull racing for more than 30 years. This experience constitutes a source of design innovation and guarantees quality and safety for the customer. Indeed, our architects are the best judges when it comes to achieving a happy compromise between performance and ease of handling.

Lagoon bridge decks are high above the water to guarantee comfort at sea with less slamming and less noise. Safety is also improved because less stress on the composite structure means greater strength. Another exclusive Lagoon innovation is the gull-wing bridge deck. First introduced in 2004 on the Lagoon 440, and further developed on all later models, the curved surface under the bridge deck reduces wave impact and noise to provide greater comfort.



Rigging


The stresses on the rigging of a cruising catamaran are much greater than those experienced by a monohull vessel because it does not heel to port or starboard, thus the rigging and sails do not benefit from a "shock-absorbing" effect. That's why Lagoon calls upon the top specialists in the field (Z Spar, Sparcraft, Selden…) to provide the most reliable and efficient equipment available. The spars, standing and running rigging and sails are all designed by our suppliers in consultation with our design office. Before entering production, Lagoon catamarans undergo sea trials to physically validate the calculated figures. These trials are carried out in the presence of technicians from our suppliers.