The Ok Dinghy is 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.
4.5 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Displacement / Length
51
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
2.5
Quick, snappy motion — better for day sails and racing than long passages.
Hull Speed
4.5kts
Pounds/Inch Immersion
1lbs
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
2.5
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
How It Compares
Side-by-side with the boats most often cross-shopped against the Ok Dinghy.
| Ok Dinghy | Enterprise Int | International Fj | Lark 13 | Rs Aero | Vaurien | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 13.1 | 13.3 | 13.2 | 13.3 | 13.2 | 13.4 |
| LWL | — | — | 12.3 | 12.8 | 13.2 | — |
| Beam | 4.9 | 5.3 | 5.3 | 5.5 | 4.6 | 4.8 |
| Displacement | 159 | 200 | 165 | 185 | 66 | 209 |
| Sail Area | 91 | 115 | 104 | 120 | 93 | 81 |
| Performance | ||||||
| SA/Disp | — | 53.8 | 55.4 | 59.2 | 91.1 | — |
| Comfort | 2.5 | 2.8 | 2.2 | 2.3 | 1.0 | 3.3 |
| Capsize | — | 3.59 | 3.83 | 3.86 | 4.53 | — |
| Hull Speed | 4.5 | 4.5 | 4.7 | 4.8 | 4.9 | 4.5 |