Sail area / displacement
How much sail the boat carries for its weight — its power in light air.
- 16.9· Cruiser
How it is worked out
sail area (ft²) ÷ (displacement as ft³ of seawater)^⅔
published upwind sail area

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N395 AC - A Modern Cruiser — Najad Yachts
* A standard reference image, not the actual boat — shown to help visualise this model's published dimensions.
From the published figures: CE Category A · LOA 11.99 m · fresh water 370 L
From the published figures: LOA 11.99 m · upwind 89 m²
From the published figures: LOA 11.99 m · 3 cabins · 2 heads · fresh water 370 L
Tags are derived from certified class, length, sail area, accommodation and tankage using the criteria described on the Sources page; an editor may add or remove one.
Classic yacht-design ratios worked out from the builder's published figures, each shown against the bands designers read it by.
How much sail the boat carries for its weight — its power in light air.
sail area (ft²) ÷ (displacement as ft³ of seawater)^⅔
published upwind sail area
How heavy the boat is for its waterline length. Lower is lighter and quicker; higher is steadier and roomier.
displacement (long tons) ÷ (0.01 × waterline length in ft)³
The share of the weight carried in the keel — a rough guide to stiffness, though how deep that weight sits matters as much.
ballast ÷ displacement × 100
Ted Brewer's measure of how gently a boat moves in a seaway. Higher means a slower, easier motion.
displacement (lb) ÷ (0.65 × (0.7 × LWL + 0.3 × LOA) × beam^1.333), lengths in ft
A guide from the inquiry after the 1979 Fastnet race: below 2 was taken as suited to ocean passages. It ignores hull shape and where the ballast sits.
beam (ft) ÷ (displacement as ft³ of seawater)^⅓
Roughly the speed a displacement hull reaches before it has to climb its own bow wave.
1.34 × √(waterline length in ft), in knots
Most builders publish a light displacement. The ratios were defined on a loaded boat, so every boat here reads a little lighter than a surveyor's figure would — all alike, which keeps them comparable.
What the builder publishes about how fast, how strong and how much the boat carries.
Fuel and water on one scale: a tank twice the height holds twice as much.
Certified CE design category A (Ocean): the wind and waves the EU Recreational Craft Directive says this boat is designed to take.
Sheltered waters
Inshore
Offshore
Ocean
Design limits set by the EU Recreational Craft Directive (2013/53/EU), in significant wave height. A category covers the conditions of those below it. It is the limit the boat was designed to, not a promise that it is safe in any conditions within it — that judgement stays with the skipper.
A figure marked with a quote mark was read from the builder's page. Open it for the exact line, the page and the date.
Figures read fromthe builder's page
Premium production
Swedish manufacturer of luxury sailing yachts, based on the island of Orust since 1971.
Najad was founded in 1971 at Henån on Orust, the Swedish island that builds more sailing yachts per square kilometre than anywhere else in the world, with a simple aim: the finest bluewater cruising yacht in Sweden. More than fifty years on, every Najad is still built by hand at Henån, where the joinery, the laminate schedule and the rigging layout are each worked out rather than left to chance. The boats have circumnavigated, crossed the Atlantic many times over, and come back.
Visit brand pageEvery model Najad Yachts publishes, by length — where this one sits in the range.
Boats this boat's designers also drew, for other builders too. Credits are grouped only where the names clearly agree, however each builder spelled them; an unclear one is left out.
Grand Soleil
LOA: 13.83 m
Hallberg-Rassy
LOA: 14.45 m