Review of Lagoon 421

Basic specs.

The Lagoon 421 is a large catamaran designed by the French maritime architect bureau VPLP Design.

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Hull

The hull is made of composite.

Interior

The boat is equipped with 6 berths and 350 liters (92 US gallons, 76 imperial gallons) fresh water capacity.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

EU classification

Lagoon 421 holds a CE certification:

The boat is by European Union certified as Class A. OCEAN:

Designed for extended voyages where conditions may exceed wind force 8 (Beaufort scale) and significant wave heights of 4 m and above but excluding abnormal conditions, and vessels largely self-sufficient.

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Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Lagoon 421 is 1.68.

Compared with other similar sail catamarans it is more spacy than 92% of all other designs.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Lagoon 421 is 249 which categorizes this boat among 'moderate racers'.

1% of all similar sailboat designs are categorized as heavier. A heavy displacement combined with smaller water plane area has lower acceleration and is more comfortable.

Maintenance

Boat owner's ideas

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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Finally

We are always looking for new photos. If you can contribute with photos for Lagoon 421 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.

References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.