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Castle 48
Designer: E. G. Van De Stadt  ·  First built: 1973
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About the Castle 48

With limited specifications available, the Castle 48 represents an intriguing entry in the 48-foot sailing yacht category that warrants further investigation by serious boat buyers. This vessel appears to fall within the performance cruising segment, likely designed to balance comfortable accommodations with respectable sailing characteristics. Given its size and naming convention, the Castle 48 was presumably engineered for extended coastal cruising and potentially offshore passages. Yachts in this length range typically offer the interior volume necessary for live-aboard cruising while maintaining the sailing performance that discerning owners expect from a quality bluewater boat. The relative scarcity of detailed specifications suggests this may be either a limited production model or a design that didn't achieve widespread market penetration. This could present both opportunities and challenges for prospective buyers - potentially offering unique features or value propositions, while also requiring more thorough due diligence regarding parts availability and service support. Sailors considering the Castle 48 should focus their evaluation on the specific boat's condition, construction quality, and systems integration rather than relying heavily on published performance data. A comprehensive marine survey becomes particularly crucial when researching lesser-documented vessels in this category.

Core Dimensions
LOA (Length Overall) 48.72 ft / 14.85 m
LWL (Waterline Length) 40.68 ft / 12.40 m
Beam 13.12 ft / 4.00 m
Max Draft 6.56 ft / 2.00 m
Displacement 33,069.00 lb / 15,000 kg
Ballast 13,228.00 lb / 6,000 kg
Sail Area (Reported) 1,276.00 ft² / 118.54 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Staysail Ketch
Construction FG
Designer E. G. van de Stadt
First Built 1973
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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
19.9
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
38.48
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
1.64
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. 8.55
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. 1.0
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