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Splinter 21
Designer: E. G. Van De Stadt  ·  Builder: H. H. Marine (Uk)/Peulen Shipyard  ·  First built: 1963
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About the Splinter 21

A compact and nimble daysailer, the Splinter 21 is designed for sailors who want an accessible and enjoyable experience on the water without the complexity of a larger vessel. Well-suited to sheltered coastal waters, lakes, and bays, this boat appeals to those looking to hone their skills or simply enjoy relaxed weekend sailing close to home. With limited specification data widely available, the Splinter 21 remains something of a modest, under-the-radar design — the kind of boat often appreciated by a loyal following of sailors who value simplicity and ease of handling over flashy performance numbers. Boats in this class typically reward attentive sailing and offer a hands-on connection to the water that larger cruisers cannot match. For a prospective buyer, the Splinter 21 represents an entry point into keelboat or small sailboat ownership that keeps maintenance demands and running costs manageable. Those researching this model would be wise to seek out owner communities and class associations, where firsthand accounts can provide the most reliable picture of what sailing a Splinter 21 is truly like day to day.

Core Dimensions
LOA (Length Overall) 21.18 ft / 6.46 m
LWL (Waterline Length) 17.00 ft / 5.18 m
Beam 6.83 ft / 2.08 m
Max Draft 3.75 ft / 1.14 m
Displacement 2,780.00 lb / 1,261 kg
Ballast 900.00 lb / 408 kg
Sail Area (Reported) 163.00 ft² / 15.14 m²
Design & Construction
Hull Type Fin Keel
Rigging Type Masthead Sloop
Construction FG
Designer E. G. Van de Stadt
Builder H. H. Marine (UK)/Peulen Shipyard
First Built 1963
Owner Reviews

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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 13.22
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 18.2
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 1.95
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 5.52
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 414.87
Find a Splinter 21 For Sale
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