The Supersail 30 is with acceptable motion comfort for coastal passages.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
7.0 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 27.4′, the Supersail 30 tops out around 7.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √27.4′ LWL = 7.0 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Comfort Ratio
22.2
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.97
Below the 2.0 offshore threshold — acceptable for ocean passages.
Hull Speed
7.0kts
S# (Speed Number)
2.9
Pounds/Inch Immersion
1lbs
Weight needed to sink the hull one inch — loading sensitivity.
Motion & Offshore Suitability
Two ratios that matter most when you're planning passages — how the boat feels in a seaway, and whether the hull geometry is suitable for open ocean.
Comfort Ratio
22.2
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.97
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Supersail 30 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Capri 30 Catalina
J/30
Cs 30
How It Compares
Side-by-side with the boats most often cross-shopped against the Supersail 30.
| Supersail 30 | Austral 30 | Capri 30 Catalina | Cs 30 | J/30 | Newport 30 2 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 30.0 | 30.0 | 30.0 | 30.0 | 30.0 | 30.0 |
| LWL | 27.4 | 23.0 | 25.0 | 25.4 | 25.0 | 26.5 |
| Beam | 10.3 | 10.2 | 10.8 | 10.3 | 10.8 | 10.7 |
| Displacement | 9 | — | 8 | 8 | 6 | 8 |
| Ballast | 4 | 3 | 3 | 3 | 2 | 2 |
| Sail Area | — | 494 | 387 | 462 | 436 | 414 |
| Performance | ||||||
| PHRF | — | — | 111 | 150 | 144 | — |
| SA/Disp | — | — | 15.5 | 18.5 | 20.8 | 16.6 |
| Bal/Disp | — | — | 37.5 | 43.0 | 39.3 | — |
| Comfort | 22.2 | — | 12.0 | 20.8 | 23.6 | 19.2 |
| Capsize | 1.97 | — | 2.62 | 2.05 | 1.73 | 2.14 |
| Hull Speed | 7.0 | 6.4 | 6.6 | 6.8 | 7.6 | 6.9 |