Gib Sea 312
GIB'SEA MARINE · Rob Humphreys · 1991
Updated
The Gib Sea 312 is a 9.08 m heavy displacement racing yacht designed by Rob Humphreys and built by GIB'SEA MARINE, first launched in 1991. It races in Class C.
Length
9.08 m
29′ 9″
Beam
3.30 m
Draft
1.38 m
Displacement
3.5 t
Sail area
40 m²
On the podium
Where a Gib Sea 312 finishes when she goes racing.
On the podium
4%
of 56 starts by 3 boats
Wins
0%
Read from 56 starts by 3 boats between 2019 and 2026, counting races with six boats or more.
Recent regattas
The latest events where a Gib Sea 312 was on the start line, named as the organisers publish them.
43ος Ιστιοπλοικος Αγωνας Κορφος ΄262026- ¨16ο Athens Trophy 2026¨2026
- Κασίδι2026
- "Ειρηνης & Φιλιας - Βαθυ Μεθανων 2025"2025
- "Αγκιστρι 2025"2025
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
—
Not enough data yet: 3 races of 10 NM or less carry a published distance.
Offshore & coastal
4%
of these races end on the podium
Who she races against
The designs a Gib Sea 312 actually lines up with, most often first. The bar shows how those meetings ended.
Some of the boats it races against
How the Gib Sea 312 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
4.42
41°
Beam reach
7.25
90°
Broad reach
8.05
135°
Downwind VMG
7.00
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 earns its keep off the wind. A course with long free legs suits it better than a windward-leeward.
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.
Where it pays
It falls short on the beat when the breeze is soft, 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 broad reach.
How fast is a Gib Sea 312
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 2.71 | 3.78 | 4.33 | 4.42 |
| 52° | 4.21 | 5.64 | 6.26 | 6.46 |
| 60° | 4.46 | 5.89 | 6.45 | 6.68 |
| 75° | 4.63 | 6.09 | 6.63 | 7.01 |
| 90° | 4.82 | 6.38 | 6.86 | 7.25 |
| 110° | 4.95 | 6.52 | 7.16 | 7.88 |
| 120° | 4.78 | 6.45 | 7.14 | 8.15 |
| 135° | 4.29 | 6.14 | 6.95 | 8.05 |
| 150° | 3.67 | 5.56 | 6.61 | 7.54 |
| Run VMG | 3.18 | 4.83 | 6.04 | 7.00 |
How they are set up
The range each sail spans across the fleet.
Roughly half carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 380 kg.
Rigging
Gib Sea 312 rig and sail dimensions
A Gib Sea 312 carries 9.88 m of mainsail hoist on a 3.35 m boom, a forestay 11.36 m above the deck and a 3.55 m bowsprit. Typical figures across the 4 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 58 to 64 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.