G-Cat 5.7 vs Sailfish 18
How do the G-Cat 5.7 and Sailfish 18 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
G-Cat 5.7 | G-Cat 5.7 | Sailfish 18 | |
|---|---|---|
| Length overall | 18.7 ft5.69 m | 18.5 ft5.65 m |
| Waterline length | 17.5 ft5.33 m | 15.0 ft4.57 m |
| Beam | 8.0 ft2.44 m | 7.0 ft2.15 m |
| Draft | —— | 1.0 ft0.30 m |
| Displacement | 360 lb163 kg | 992 lb450 kg |
| Ballast | —— | 243 lb110 kg |
| Sail area | 235 ft²21.8 m² | 172 ft²16.0 m² |
| SA / Displacement | 74.30 | 27.67 |
| Displacement / Length | 30 | 131 |
| Comfort ratio | 2.0 | 7.1 |
| Capsize screening | 4.50 | 2.83 |
| Hull speed (kn) | 5.6 | 5.2 |
| Average used price | — | €1,000 |
G-Cat 5.7 vs Sailfish 18: the short version
- The G-Cat 5.7 and Sailfish 18 are close in length (18.7 ft5.69 m vs 18.5 ft5.65 m ).
- The Sailfish 18 is heavier, displacing about 176% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the G-Cat 5.7 carries the more powerful rig (74.3 vs 27.7), favouring lighter-air performance.
- The Sailfish 18 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Sailfish 18 rates better for offshore work (2.83 vs 4.50).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.