Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
6.9 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 26.3′, the Us 305 tops out around 6.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √26.3′ LWL = 6.9 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
234s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
Ballast / Displacement
35.0%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
247
Moderate — a good balance of speed and load-carrying ability.
Hull Speed
6.9kts
Pounds/Inch Immersion
6lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Us 305 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Capri 30 Catalina
Cs 30
Irwin 30 Citation
Columbia 30
Us 305
Heavy or slow cruiser — all about the journey, not the elapsed time.
How It Compares
Side-by-side with the boats most often cross-shopped against the Us 305.
| Us 305 | Capri 30 Catalina | Columbia 30 | Cs 30 | Irwin 30 Citation | Newport 30 3 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 30.0 | 30.0 | 30.0 | 30.0 | 30.0 | 30.0 |
| LWL | 26.3 | 25.0 | 26.5 | 25.4 | 26.9 | 26.5 |
| Beam | 10.2 | 10.8 | 9.5 | 10.3 | 10.0 | 10.7 |
| Displacement | 10 | 8 | 10 | 8 | 10 | 8 |
| Ballast | 3 | 3 | — | 3 | 4 | 2 |
| Sail Area | — | 387 | 515 | 462 | 495 | — |
| Performance | ||||||
| PHRF | 234 | 111 | 180 | 150 | 177 | — |
| SA/Disp | — | 15.5 | 16.9 | 18.5 | 16.7 | — |
| Bal/Disp | 35.0 | 37.5 | — | — | 41.4 | 30.6 |
| Comfort | — | 12.0 | 30.2 | 20.8 | 26.9 | — |
| Capsize | — | 2.62 | 1.72 | 2.05 | 1.84 | — |
| Hull Speed | — | 6.6 | 6.9 | 6.8 | 7.0 | — |