Javelin dinghy vs O'Day 30
How do the Javelin dinghy and O'Day 30 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Javelin dinghy 
O'Day 30 | Javelin dinghy | O'Day 30 | |
|---|---|---|
| Length overall | 17.6 ft5.38 m | 29.9 ft9.12 m |
| Waterline length | 13.2 ft4.01 m | 25.4 ft7.75 m |
| Beam | 5.6 ft1.70 m | 10.8 ft3.28 m |
| Draft | 3.8 ft1.17 m | 4.9 ft1.49 m |
| Displacement | 475 lb215 kg | 10,150 lb4,604 kg |
| Ballast | 49 lb22 kg | 4,000 lb1,814 kg |
| Sail area | 125 ft²11.6 m² | 441 ft²41.0 m² |
| SA / Displacement | 32.85 | 15.05 |
| Displacement / Length | 93 | 276 |
| Comfort ratio | 5.1 | 24.8 |
| Capsize screening | 2.86 | 1.99 |
| Hull speed (kn) | 4.9 | 6.8 |
Javelin dinghy vs O'Day 30: the short version
- The O'Day 30 is the larger boat at 29.9 ft9.12 m LOA versus 17.6 ft5.38 m for the Javelin dinghy.
- The O'Day 30 is heavier, displacing about 2037% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Javelin dinghy carries the more powerful rig (32.9 vs 15.1), favouring lighter-air performance.
- The O'Day 30 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the O'Day 30 rates better for offshore work (1.99 vs 2.86).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.