Mat 124
MAT · Mark Mills · 2005
Updated
The Mat 124 is a 12.45 m displacement racing yacht designed by Mark Mills and built by MAT, first launched in 2005. It races in Class B.
Length
12.45 m
40′ 10″
Beam
3.78 m
Draft
2.59 m
Displacement
7.2 t
Sail area
100 m²
On the podium
Where a Mat 124 finishes when she goes racing.
0
Wins
0
Seconds
0
Thirds
6
Starts
Not enough races yet for a percentage — these are the counts so far. We keep collecting results, so this will fill in.
Read from 6 starts by 2 boats between 2016 and 2026, counting races with six boats or more.
Recent regattas
The latest events where a Mat 124 was on the start line, named as the organisers publish them.
73° Loro Piana Giraglia2026
Copa del Canal2016
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
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Not enough data yet: no races of 10 NM or less carry a published distance.
Offshore & coastal
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Not enough data yet: 6 races over 10 NM carry a published distance.
Who she races against
The designs a Mat 124 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
Irc 52 (5 meetings), Ker 46 (5 meetings), Grand Soleil 44 (Polli) (5 meetings), Farr 45 (5 meetings), Mat 122 (5 meetings), Sly 42 (5 meetings), First 44.7 (5 meetings), Botin 44 (4 meetings), ClubSwan 42 (4 meetings), Grand Soleil 48 (4 meetings), Cape 31 (4 meetings), Vor 60 (1 meeting), Mat 118 (1 meeting), Dufour 40 (1 meeting), J/122 (1 meeting), X-332 (1 meeting), J/97 (1 meeting), Frers 60 (1 meeting), J/99 (2 meetings), J/112 (2 meetings), Swan 60 (1 meeting), Dehler 36 (Judel/Vrolijk) (1 meeting), Sun Fast 3600 (1 meeting), J/92 (1 meeting), First 40.7 (1 meeting), First 47.7 (1 meeting), First 36.7 (1 meeting), Grand Soleil 50 (Judel/Vrolijk) (1 meeting), Baltic 42 (1 meeting), JOD 35 (2 meetings), First 35 (Berret) (1 meeting), Sun Odyssey 49 (1 meeting), X-302 (1 meeting), Sun Odyssey 45 (1 meeting), Cobo 40 (1 meeting)
Some of the boats it races against
How the Mat 124 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
6.04
36°
Beam reach
9.36
90°
Broad reach
11.35
135°
Downwind VMG
8.79
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.
There is no obvious weak spot here. 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 it pipes up, where it goes better than its measurements say it should, and by a margin worth having. It holds that advantage running deep as well, so the gain is not down to one leg of the course.
Where it pays
There is no condition where it falls away badly, which is worth something over a season of mixed weather.
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 0.6 kn either way.
At 10 knots this design makes back more than its rating asks on the downwind.
How fast is a Mat 124
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.97 | 5.39 | 5.85 | 6.04 |
| 52° | 6.02 | 7.61 | 8.03 | 8.23 |
| 60° | 6.34 | 7.78 | 8.24 | 8.48 |
| 75° | 6.56 | 7.91 | 8.48 | 8.92 |
| 90° | 6.70 | 8.13 | 8.71 | 9.36 |
| 110° | 6.63 | 8.29 | 9.05 | 10.32 |
| 120° | 6.46 | 8.25 | 9.27 | 10.64 |
| 135° | 5.82 | 7.92 | 8.99 | 11.35 |
| 150° | 4.88 | 7.16 | 8.35 | 10.03 |
| Run VMG | 4.22 | 6.20 | 7.38 | 8.79 |
How they are set up
The range each sail spans across the fleet.
Nearly all carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 790 kg.
Rigging
Mat 124 rig and sail dimensions
A Mat 124 carries 16.55 m of mainsail hoist on a 5.76 m boom, a forestay 16.82 m above the deck and a 5.67 m bowsprit. Typical figures across the 5 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 153 to 172 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.