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Microsail Mull
Designer: Gary Mull  ·  Builder: Jeanneau/Franck Roy  ·  First built: 1980
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About the Microsail Mull

Among the lesser-documented sailboats in maritime records, the Microsail Mull represents an intriguing entry that has captured the attention of sailing enthusiasts seeking information about this elusive design. With limited specifications readily available, much of what defines this vessel remains within the realm of owner experiences and sailing community discussions. The Mull name in sailing circles often carries associations with performance-oriented designs, suggesting this boat may have been conceived with an emphasis on sailing efficiency and handling characteristics. Based on the "Microsail" designation, this appears to be a smaller vessel, likely designed for day sailing, coastal exploration, or as an entry-level boat for developing sailing skills. Without comprehensive technical data, potential buyers and sailing researchers must rely on firsthand accounts and any available documentation from previous owners or sailing publications. This scarcity of information makes the Microsail Mull something of a mystery boat, appealing to those who appreciate discovering hidden gems in the sailing world. For anyone considering this vessel, thorough inspection and consultation with experienced marine surveyors would be particularly valuable given the limited published specifications and performance data available through conventional channels.

Core Dimensions
LOA (Length Overall) 18.04 ft / 5.50 m
LWL (Waterline Length) 16.40 ft / 5.00 m
Beam 8.04 ft / 2.45 m
Max Draft 3.61 ft / 1.10 m
Min Draft 0.66 ft / 0.20 m
Displacement 1,323.00 lb / 600 kg
Ballast 507.00 lb / 230 kg
Design & Construction
Hull Type Lifting Keel
Rigging Type Fractional Sloop
Construction FG
Designer Gary Mull
Builder Jeanneau/Franck Roy
First Built 1980
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Performance Ratios
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
7.53
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
2.93
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. 5.43
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. 471.14
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