JONGERT 21S
Specifications
Hull
| LOA | 72 ft |
| LWL | 51 ft |
| Beam | 18.58 ft |
| Draft | 10.17 ft |
| Displacement | 110,000 lb |
| Ballast | 19,998 lb |
| Hull speed1.34·√LWL | 9.6 kn |
About the JONGERT 21S
The Jongert 21S is a substantial 72.0 ft ketch designed by Doug Peterson and Peter Sijm, built by Jongert (NED) with production starting in 1981. With a displacement of 110000.0 lb and a comfort ratio of 60.6, this vessel represents a heavy-displacement cruising platform, though the exact total hulls built remains unconfirmed.
- Best for:
- This boat is best suited for experienced bluewater cruisers seeking a stable, heavy-displacement ketch for long-range offshore passages, particularly those who value comfort and self-sufficiency over high-speed performance.
- Bluewater capability:
- With a capsize ratio of 1.55 and a D/L ratio of 370.2, the Jongert 21S exhibits strong offshore stability and seakeeping characteristics, supported by owner reports of extensive watermaker and solar panel installations for self-sufficiency.
- Comparables:
- Comparable vessels include other large, heavy-displacement ketches from the late 1970s and 1980s such as the Hallberg-Rassy 43 or O'Day 38, sharing similar roles in comfortable, safe offshore cruising with substantial ballast and beam.
Performance
Estimated Value
Limited DataEstimated Cost of Ownership
Based on 72ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
We don't have enough data on the JONGERT 21Syet to publish model-specific findings we'd stand behind — but here's a free general inspection checklist, built from our research into what actually goes wrong on boats of this kind.
Drawn from 7,029 documented issues across 2,391 models, ordered so the areas that most often turn up problems come first.
Own a JONGERT 21S? Reports from owners are what turn this into a model-specific checklist — and they're the reason the boats above it have one.
Similar Sailboats
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Used sails that fit the JONGERT 21S
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