Atlantic 31
ATLANTIC · J&J Design · 1990
Updated
The Atlantic 31 is a 9.19 m heavy displacement racing yacht designed by J&J Design and built by ATLANTIC, first launched in 1990. It races in Class C. Across the measured fleet it goes better than its own numbers promise, ahead of 23% of the designs it races against. It comes alive as the breeze builds, and gives time away in the light.
Goes better than its own measurements promise, and does it better than 23% of the boats it races against.
123rd of 159 in its class.
This design has been found in real race results — 245 starts across 67 events — not only in measurement files.
Length
9.19 m
30′ 2″
Beam
3.41 m
Draft
1.60 m
Displacement
4.1 t
Sail area
45 m²
On the podium
Where a Atlantic 31 finishes when she goes racing.
On the podium
15%
of 245 starts by 11 boats
Wins
4%
Read from 245 starts by 11 boats between 2017 and 2026, counting races with six boats or more.
Recent regattas
The latest events where a Atlantic 31 was on the start line, named as the organisers publish them.
9ο Κυπελλο Καλλιθεας2026- "Αγκιστρι 2026"2026
- 43ος Ιστιοπλοικος Αγωνας Κορφος ΄262026
- "Νικολαος Σαρικαβαζης 2026"2026
- Aegean Regatta2026
Raced one we are missing?
Report a regattaRound the buoys, or offshore
A short windward-leeward and a night at sea ask different things of a boat. Here is how this one does in each.
Round the buoys
6%
of these races end on the podium
Offshore & coastal
16%
of these races end on the podium
Better the longer it gets. Boats that settle into a groove and hold it gain ground once the course stops turning.
Who she races against
The designs a Atlantic 31 actually lines up with, most often first. The bar shows how those meetings ended.
Some of the boats it races against
How the Atlantic 31 has fared against each of them, boat against boat on corrected time. Ordered by how often the two meet, not by who wins.
Speed at every angle
The shape of this design's speed, drawn from the measured fleet. Pick a wind and watch it stretch.
Upwind VMG
4.49
40°
Beam reach
7.32
90°
Broad reach
7.99
135°
Downwind VMG
7.03
170°
Speed in knots at 20 knots of true wind. Green marks the angles that pay: the closest useful beat and the deepest run worth sailing.
Where it wins and where it pays
Every boat is judged against its own measurements — length, weight, sail area. The quicker those say it should be, the more it has to deliver just to break even. Going fast is not enough: it has to go faster than its own numbers promised.
This design is even-tempered. It rewards preparation and crew work more than it rewards picking the right day.
Where it gains
Its best ground is on a broad reach once the breeze fills, where it does more than its size and sail area promise, and by a margin worth having. It holds that advantage on the beam as well, so the gain is not down to one leg of the course.
Where it pays
It falls short on the beat in the light stuff, giving away time it never gets back.
Above the line it delivers more than promised and gains on the fleet. Below, it falls short. Move the wind: plenty of boats sit on one side in the light and the other when it blows.
Full width is 0.4 kn either way.
At 10 knots this design makes back more than its rating asks on the beam reach.
How fast is a Atlantic 31
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 2.64 | 3.73 | 4.34 | 4.49 |
| 52° | 4.12 | 5.63 | 6.32 | 6.52 |
| 60° | 4.40 | 5.89 | 6.50 | 6.74 |
| 75° | 4.61 | 6.11 | 6.72 | 7.10 |
| 90° | 4.71 | 6.35 | 6.92 | 7.32 |
| 110° | 4.82 | 6.45 | 7.17 | 7.93 |
| 120° | 4.65 | 6.36 | 7.15 | 8.16 |
| 135° | 4.20 | 6.05 | 6.94 | 7.99 |
| 150° | 3.60 | 5.46 | 6.61 | 7.55 |
| Run VMG | 3.12 | 4.75 | 5.98 | 7.03 |
How they are set up
The range each sail spans across the fleet.
Roughly half carry a folding propeller. Crew weight is declared around 400 kg.
Rigging
Atlantic 31 rig and sail dimensions
A Atlantic 31 carries 10.24 m of mainsail hoist on a 3.25 m boom, a forestay 11.86 m above the deck and a 3.87 m bowsprit. Typical figures across the 11 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 54 to 67 m² depending on bowsprit and set-up. Before ordering a sail, read the figure on your own measurement record rather than the typical one for the design.