Geary 18 vs Naiad 18
How do the Geary 18 and Naiad 18 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Geary 18 
Naiad 18 | Geary 18 | Naiad 18 | |
|---|---|---|
| Length overall | 18.2 ft5.54 m | 18.3 ft5.56 m |
| Waterline length | —— | 17.5 ft5.33 m |
| Beam | 5.5 ft1.66 m | 6.0 ft1.83 m |
| Draft | 3.8 ft1.14 m | 3.7 ft1.12 m |
| Displacement | 525 lb238 kg | 1,100 lb499 kg |
| Ballast | —— | 550 lb249 kg |
| Sail area | 200 ft²18.6 m² | 144 ft²13.4 m² |
| SA / Displacement | 49.17 | 21.62 |
| Displacement / Length | — | 92 |
| Comfort ratio | — | 8.8 |
| Capsize screening | 2.71 | 2.32 |
| Hull speed (kn) | — | 5.6 |
Geary 18 vs Naiad 18: the short version
- The Geary 18 and Naiad 18 are close in length (18.2 ft5.54 m vs 18.3 ft5.56 m ).
- The Naiad 18 is heavier, displacing about 110% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Geary 18 carries the more powerful rig (49.2 vs 21.6), favouring lighter-air performance.
- By the capsize screening formula the Naiad 18 rates better for offshore work (2.32 vs 2.71).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.