BB 10 vs Catalina 309
How do the BB 10 and Catalina 309 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
BB 10 
Catalina 309 | BB 10 | Catalina 309 | |
|---|---|---|
| Length overall | 32.8 ft10.00 m | 32.8 ft9.98 m |
| Waterline length | 23.9 ft7.29 m | 26.5 ft8.08 m |
| Beam | 7.5 ft2.30 m | 11.5 ft3.51 m |
| Draft | 4.8 ft1.46 m | 6.3 ft1.91 m |
| Displacement | 4,956 lb2,248 kg | 9,800 lb4,445 kg |
| Ballast | 2,700 lb1,225 kg | 4,000 lb1,814 kg |
| Sail area | 358 ft²33.3 m² | 523 ft²48.6 m² |
| SA / Displacement | 19.71 | 18.27 |
| Displacement / Length | 162 | 235 |
| Comfort ratio | 19.5 | 20.6 |
| Capsize screening | 1.77 | 2.15 |
| Hull speed (kn) | 6.6 | 6.9 |
BB 10 vs Catalina 309: the short version
- The BB 10 and Catalina 309 are close in length (32.8 ft10.00 m vs 32.8 ft9.98 m ).
- The Catalina 309 is heavier, displacing about 98% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the BB 10 carries the more powerful rig (19.7 vs 18.3), favouring lighter-air performance.
- The Catalina 309 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the BB 10 rates better for offshore work (1.77 vs 2.15).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.