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

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Excess Catamarans
* 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 12.99 m · fresh water 300 L
From the published figures: LOA 12.99 m · 4 cabins · fresh water 300 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
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.
7 gal of water per berth
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
Films of this model from the builder's official YouTube channel (EXCESS Catamarans). They are the builder's own; the figures above are the reference.
🌊⛵😎⚡🔥 : Message received from your Excess 13! #boat
The Excess 13 is the perfect spot
Videos whose title names the Excess 13, from the channel the builder's site links; last checked 9/30/2026. Playing one loads YouTube's player, which may set cookies.
Volume production
French builder of sporty sailing catamarans, part of Groupe Beneteau, launched with the Excess 12 and Excess 15.
Visit brand pageEvery model Excess Catamarans 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.