The Jongert 19 is with a gentle bluewater motion.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
9.1 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 46.3′, the Jongert 19 tops out around 9.1 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √46.3′ LWL = 9.1 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
77.5
Very comfortable in a seaway — a genuine bluewater motion.
Capsize Screening
1.34
Below the 2.0 offshore threshold — acceptable for ocean passages.
Hull Speed
9.1kts
Pounds/Inch Immersion
2lbs
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
77.5
Very comfortable in a seaway — a genuine bluewater motion.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.34
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 Jongert 19 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Nicholson 70
How It Compares
Side-by-side with the boats most often cross-shopped against the Jongert 19.
| Jongert 19 | Little Harbor 63 | Nicholson 70 | Oyster 70 | Swan 65 Ss Ketch | Swan 651 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 67.3 | 63.8 | 70.0 | 70.0 | 64.6 | 65.7 |
| LWL | 46.3 | 48.7 | 54.5 | 58.0 | 47.0 | 55.1 |
| Beam | 15.8 | 17.3 | 17.1 | 17.3 | 16.3 | 17.5 |
| Displacement | 103 | 65 | 111 | 91 | 70 | 75 |
| Ballast | 19 | 27 | — | 24 | 30 | 31 |
| Sail Area | — | 1 | — | 2 | 1 | 2 |
| Performance | ||||||
| PHRF | — | — | 48 | — | — | — |
| SA/Disp | — | 19.3 | — | 23.8 | 17.0 | 18.8 |
| Bal/Disp | — | 41.5 | — | — | 43.7 | 42.0 |
| Comfort | 77.5 | 42.6 | — | 51.5 | 50.4 | 44.3 |
| Capsize | 1.34 | 1.72 | — | 1.54 | 1.58 | 1.66 |
| Hull Speed | 9.1 | 9.4 | — | 10.2 | 9.2 | 9.9 |