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Blue Jacket 40
Designer: Tim Jackett W/Bob Johnson  ·  Builder: Blue Jacket Yachts  ·  First built: 2012
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About the Blue Jacket 40

Originally built by Blue Jacket Marine in the 1970s, this 40-foot sailboat represents a classic approach to mid-sized cruising yacht design from that era. Blue Jacket Marine, known for their traditional aesthetics and solid construction methods, created boats that prioritized seaworthiness and comfort over pure performance. While detailed specifications remain scarce, the Blue Jacket 40 embodies the design philosophy prevalent during the 1970s cruising boom, when builders focused on creating capable offshore vessels for the growing ranks of blue-water sailors. The boat likely features a moderate displacement hull with adequate beam for interior volume, making it suitable for extended coastal cruising and potentially light offshore passages. Blue Jacket's reputation centered on building well-found vessels with traditional lines and reliable construction techniques. Owners of Blue Jacket boats often praise their solid feel and seakindly motion in various sea conditions. The 40-footer would have been positioned as a serious cruising boat, appealing to sailors seeking a vessel capable of comfortable weekend trips and longer coastal adventures. Given the limited production numbers typical of smaller builders from this period, finding detailed information or parts may require connecting with other Blue Jacket owners or specialized classic boat resources.

Core Dimensions
LOA (Length Overall) 39.83 ft / 12.14 m
LWL (Waterline Length) 35.00 ft / 10.67 m
Beam 12.33 ft / 3.76 m
Max Draft 7.42 ft / 2.26 m
Displacement 16,500.00 lb / 7,484 kg
Ballast 6,100.00 lb / 2,767 kg
Sail Area (Reported) 883.00 ft² / 82.03 m²
Headroom 6.42 ft / 1.96 m
Design & Construction
Hull Type Fin w/bulb & spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Tim Jackett w/Bob Johnson
Builder Blue Jacket Yachts
First Built 2012
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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
90
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
21.88
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
24.65
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
1.94
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. 7.93
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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