Cape Cod Cat vs Siren 17
How do the Cape Cod Cat and Siren 17 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Cape Cod Cat 
Siren 17 | Cape Cod Cat | Siren 17 | |
|---|---|---|
| Length overall | 17.0 ft5.18 m | 17.2 ft5.23 m |
| Waterline length | 16.4 ft5.00 m | 15.0 ft4.57 m |
| Beam | 7.9 ft2.41 m | 6.7 ft2.03 m |
| Draft | 4.8 ft1.47 m | 4.3 ft1.30 m |
| Displacement | 2,200 lb998 kg | 750 lb340 kg |
| Ballast | 500 lb227 kg | 130 lb59 kg |
| Sail area | 250 ft²23.2 m² | 139 ft²12.9 m² |
| SA / Displacement | 23.65 | 26.94 |
| Displacement / Length | 222 | 99 |
| Comfort ratio | 13.0 | 5.9 |
| Capsize screening | 2.44 | 2.94 |
| Hull speed (kn) | 5.4 | 5.2 |
Cape Cod Cat vs Siren 17: the short version
- The Cape Cod Cat and Siren 17 are close in length (17.0 ft5.18 m vs 17.2 ft5.23 m ).
- The Cape Cod Cat is heavier, displacing about 193% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Siren 17 carries the more powerful rig (26.9 vs 23.6), favouring lighter-air performance.
- The Cape Cod Cat scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Cape Cod Cat rates better for offshore work (2.44 vs 2.94).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.