JY15 vs Vanguard 15
How do the JY15 and Vanguard 15 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
JY15 
Vanguard 15 | JY15 | Vanguard 15 | |
|---|---|---|
| Length overall | 15.0 ft4.57 m | 15.3 ft4.65 m |
| Waterline length | —— | 15.0 ft4.57 m |
| Beam | 5.8 ft1.78 m | 5.5 ft1.68 m |
| Draft | 3.0 ft0.91 m | 3.4 ft1.04 m |
| Displacement | 275 lb125 kg | 200 lb91 kg |
| Ballast | —— | —— |
| Sail area | 135 ft²12.5 m² | 125 ft²11.6 m² |
| SA / Displacement | 51.08 | 58.48 |
| Displacement / Length | — | 26 |
| Comfort ratio | — | 2.1 |
| Capsize screening | 3.59 | 3.76 |
| Hull speed (kn) | — | 5.2 |
JY15 vs Vanguard 15: the short version
- The JY15 and Vanguard 15 are close in length (15.0 ft4.57 m vs 15.3 ft4.65 m ).
- The JY15 is heavier, displacing about 38% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Vanguard 15 carries the more powerful rig (58.5 vs 51.1), favouring lighter-air performance.
- By the capsize screening formula the JY15 rates better for offshore work (3.59 vs 3.76).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.