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Seamaster Sailer 19
Designer: Laurent Giles  ·  Builder: Seamaster Ltd. (Uk)  ·  First built: 1971
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About the Seamaster Sailer 19

Designed by the renowned Laurent Giles naval architecture firm and built by Seamaster Ltd. in the UK starting in 1971, this compact 19-footer represents classic British yacht design from the early 1970s. The Sailer 19 combines traditional proportions with practical coastal cruising capabilities, making it an appealing choice for those seeking an authentic sailing experience in a manageable package. With its deep 5.50-foot draft and substantial 1,668 pounds of ballast in a 3,370-pound displacement, this masthead sloop prioritizes stability and seaworthiness over shallow-water accessibility. The keel/centerboard configuration offers some draft flexibility while maintaining excellent upwind performance. Her comfort ratio of 21.03 suggests a relatively stiff, quick motion that's well-suited to experienced sailors who appreciate responsive handling. The modest 187 square feet of sail area and SA/Displacement ratio of 13.35 indicate this is not a speed demon, but rather a well-mannered cruiser designed for coastal exploration and day sailing. Her capsize screening formula of 1.92 falls within acceptable limits for protected waters and moderate offshore conditions. Laurent Giles' reputation for creating seaworthy designs with pleasant sailing characteristics shines through in this compact yet capable coastal cruiser that embodies the best of 1970s British yacht building traditions.

Core Dimensions
LOA (Length Overall) 19.00 ft / 5.79 m
LWL (Waterline Length) 17.50 ft / 5.33 m
Beam 7.17 ft / 2.19 m
Max Draft 5.50 ft / 1.68 m
Min Draft 2.50 ft / 0.76 m
Displacement 3,370.00 lb / 1,529 kg
Ballast 1,668.00 lb / 757 kg
Sail Area (Reported) 187.00 ft² / 17.37 m²
Design & Construction
Hull Type Keel/Cbrd.
Rigging Type Masthead Sloop
Construction FG
Designer Laurent Giles
Builder Seamaster Ltd. (UK)
First Built 1971
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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
13.35
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
49.5
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
280.72
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
21.03
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
1.92
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. 5.61 kn
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. 448.34 pounds/inch
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