Catalina 310
Catalina Yachts · designed by Gerry Douglas · 1999
fin keel or wing keelMasthead sloopUnited States
The Catalina 310 is a 31-foot masthead sloop sailboat designed by Gerry Douglas and built by Catalina Yachts, first launched in 1999.
General
| Builder | Catalina Yachts |
|---|---|
| Designer | Gerry Douglas |
| Years built | 1999 |
| Hull type | fin keel or wing keel |
| Rig type | Masthead sloop |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 31.00 ft9.45 m |
|---|---|
| LWL | 26.50 ft8.08 m |
| Beam | 11.50 ft3.51 m |
| Draft (max) | 5.75 ft1.75 m |
| Displacement | 10,300 lb4,672 kg |
| Ballast | 4,000 lb1,814 kg |
| Sail Area | 493 ft²45.8 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 16.66 Cruiser — good all-round performance
Ballast / Displacement 38.8 % Higher = stiffer / more sail-carrying power
Displacement / Length 247 Moderate
Comfort Ratio 22.1 Coastal cruiser
Capsize Screening 2.11 Better suited to coastal use (> 2.0)
Hull Speed 6.9 kn Theoretical max displacement speed
How these numbers are calculated
- SA / Displacement
SA ÷ (Disp ÷ 64)^(2/3)— Power-to-weight. < 16 under-canvassed, 16–20 cruiser, > 20 racer.- Ballast / Displacement
Ballast ÷ Disp × 100— Stability/stiffness. Higher carries sail better.- Displacement / Length
Disp(lt) ÷ (0.01 · LWL)³— < 100 ultralight, 100–200 light, 200–300 moderate, > 300 heavy.- Comfort Ratio (Brewer)
Disp ÷ (0.65 · (0.7·LWL + 0.3·LOA) · Beam^1.33)— Motion in a seaway. Higher = more comfortable offshore.- Capsize Screening
Beam ÷ (Disp ÷ 64)^(1/3)— ≤ 2.0 favored for offshore; > 2.0 better for coastal use.- Hull Speed
1.34 · √LWL— Theoretical max displacement speed in knots.
Estimated price
$33,500 typical range $27,000 – $40,000
⚠ Rough estimate only — not market data. Derived from a simple model based on length and hull age; actual asking prices vary widely with condition, equipment, engine hours and location.
