The Herreshoff 12 12 is well-powered with enough sail area to move in light air, with a quick, snappy motion best suited to day sailing.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 12.5′, the Herreshoff 12 12 tops out around 4.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √12.5′ LWL = 4.7 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
19.3
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Ballast / Displacement
58.8%
Race-oriented ballast ratio — very stiff and powerful.
Displacement / Length
286
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
13.7
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.17
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
2lbs
Weight needed to sink the hull one inch — loading sensitivity.
Motion & Offshore Suitability
Two ratios that matter most when you're planning passages — how the boat feels in a seaway, and whether the hull geometry is suitable for open ocean.
Comfort Ratio
13.7
Quick, snappy motion — better for day sails and racing than long passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
2.17
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
Estimated Speed by Wind
Rough boat speed estimates at different true wind speeds and points of sail — derived from hull speed, SA/D, and displacement, not measured polars.
| Point of Sail |
6 kts TWS |
10 kts TWS |
15 kts TWS |
20 kts TWS |
| Close-hauled40–50° |
2.0 |
2.5 |
2.8 |
3.0 |
| Close Reach60° |
2.4 |
3.1 |
3.4 |
3.6 |
| Beam Reach90° |
3.0 |
3.8 |
4.2 |
4.4 |
| Broad Reach120–135° |
2.8 |
3.5 |
3.9 |
4.1 |
| Run150–180° |
2.2 |
2.8 |
3.1 |
3.3 |
These are simplified estimates based on hull speed (4.7 kts),
SA/D (19.3), and empirical efficiency curves — not instrument-measured
polars. Real-world speed varies with sea state, bottom condition, sail trim, and current.
Speeds in gold approach hull speed;
bold gold means near or at hull speed.
Wind Range & Comfort Envelope
Estimated wind ranges for comfortable sailing on the Herreshoff 12 12 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–6 kts
6–20 kts
20–30 kts
30+ kts
Ghosting
0–6 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
6–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–30 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
30+ kts
Storm conditions. Storm jib or bare poles. Seek shelter if coastal.
How It Compares
Side-by-side with the boats most often cross-shopped against the Herreshoff 12 12.
|
Herreshoff 12 12 |
Bulls Eye |
Com-Pac 16 |
Comet Od Usa |
Cottontail |
Wayfarer |
| Dimensions |
| LOA |
15.8 |
15.7 |
16.0 |
16.0 |
15.8 |
15.8 |
| LWL |
12.5 |
12.6 |
14.0 |
15.0 |
14.0 |
14.8 |
| Beam |
5.8 |
5.8 |
6.0 |
5.5 |
5.1 |
6.1 |
| Displacement |
1 |
1 |
1 |
260 |
286 |
372 |
| Ballast |
735 |
750 |
450 |
— |
— |
— |
| Sail Area |
140 |
140 |
113 |
140 |
120 |
141 |
| Performance |
| SA/Disp |
19.3 |
18.4 |
17.0 |
55.0 |
44.3 |
43.7 |
| Bal/Disp |
58.8 |
55.6 |
40.9 |
— |
— |
— |
| Comfort |
13.7 |
14.7 |
10.6 |
2.7 |
3.5 |
3.4 |
| Capsize |
2.17 |
2.11 |
2.33 |
3.45 |
3.09 |
3.38 |
| Hull Speed |
4.7 |
4.8 |
5.0 |
5.2 |
5.0 |
5.2 |