Catalina 18 vs Catalina 375
How do the Catalina 18 and Catalina 375 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Catalina 18 
Catalina 375 | Catalina 18 | Catalina 375 | |
|---|---|---|
| Length overall | 18.0 ft5.49 m | 38.5 ft11.73 m |
| Waterline length | 16.3 ft4.98 m | 34.4 ft10.49 m |
| Beam | 7.6 ft2.31 m | 13.0 ft3.96 m |
| Draft | 2.3 ft0.71 m | 6.8 ft2.08 m |
| Displacement | 1,500 lb680 kg | 15,500 lb7,031 kg |
| Ballast | 425 lb193 kg | 5,200 lb2,359 kg |
| Sail area | 151 ft²14.0 m² | 646 ft²60.0 m² |
| SA / Displacement | 18.44 | 16.63 |
| Displacement / Length | 154 | 170 |
| Comfort ratio | 9.3 | 22.1 |
| Capsize screening | 2.65 | 2.09 |
| Hull speed (kn) | 5.4 | 7.9 |
Catalina 18 vs Catalina 375: the short version
- The Catalina 375 is the larger boat at 38.5 ft11.73 m LOA versus 18.0 ft5.49 m for the Catalina 18.
- The Catalina 375 is heavier, displacing about 933% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Catalina 18 carries the more powerful rig (18.4 vs 16.6), favouring lighter-air performance.
- The Catalina 375 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Catalina 375 rates better for offshore work (2.09 vs 2.65).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.