Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
6.0 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 19.8′, the Ocean Craft 21 tops out around 6.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √19.8′ LWL = 6.0 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
255s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
Displacement / Length
162
Moderate — a good balance of speed and load-carrying ability.
Hull Speed
6.0kts
Pounds/Inch Immersion
3lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Ocean Craft 21 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Irwin 21 Free Spirit
Hunter 212
Venture 21
Ocean Craft 21
Heavy or slow cruiser — all about the journey, not the elapsed time.
Macgregor 21
Clipper Marine 21
How It Compares
Side-by-side with the boats most often cross-shopped against the Ocean Craft 21.
| Ocean Craft 21 | Clipper Marine 21 | Hunter 212 | Irwin 21 Free Spirit | Macgregor 21 | Venture 21 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 21.0 | 20.9 | 21.0 | 21.0 | 21.0 | 21.0 |
| LWL | 19.8 | 16.7 | 18.0 | 16.5 | 18.5 | 18.5 |
| Beam | 7.0 | 7.3 | 9.2 | 8.0 | 6.8 | 6.8 |
| Displacement | 2 | 1 | 1 | 1 | 1 | 1 |
| Ballast | — | 410 | 140 | 750 | 400 | 400 |
| Sail Area | — | 192 | 202 | 202 | — | — |
| Performance | ||||||
| PHRF | 255 | 270 | 216 | 215 | 263 | 252 |
| SA/Disp | — | 20.8 | 21.9 | 21.9 | — | — |
| Bal/Disp | — | 22.8 | 7.8 | 41.7 | 34.0 | 26.7 |
| Comfort | — | 11.1 | 7.7 | 9.8 | — | — |
| Capsize | — | 2.39 | 3.02 | 2.63 | — | — |
| Hull Speed | — | 5.5 | 5.7 | 5.4 | — | — |