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Ef 34
Designer: Strahlmann  ·  Builder: Ef Marine  ·  First built: 2000
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About the Ef 34

With limited specifications available, the Ef 34 represents a somewhat elusive entry in the 34-foot sailboat category. This boat appears to be part of a less commonly documented sailing vessel lineage, making detailed information challenging to verify through standard industry channels. Based on its designation and the typical characteristics of boats in this size range, the Ef 34 would likely appeal to sailors seeking a mid-sized cruising vessel suitable for coastal adventures and extended weekend sailing. Boats of this length generally offer a comfortable balance between manageable single-handed sailing capabilities and sufficient interior space for small crew accommodation. The scarcity of readily available specifications suggests this model may have had limited production numbers or represents a regional design that didn't achieve widespread market penetration. This can sometimes work in favor of prospective buyers, as lesser-known models occasionally offer good value compared to their more famous counterparts. Potential buyers interested in the Ef 34 would benefit from thorough inspection and verification of construction quality, rigging condition, and overall maintenance history. The limited documentation makes individual boat assessment even more critical than usual when evaluating purchase decisions.

Core Dimensions
LOA (Length Overall) 34.19 ft / 10.42 m
LWL (Waterline Length) 30.18 ft / 9.20 m
Beam 10.50 ft / 3.20 m
Max Draft 5.91 ft / 1.80 m
Displacement 10,582.00 lb / 4,800 kg
Ballast 3,858.00 lb / 1,750 kg
Sail Area (Reported) 549.00 ft² / 51.00 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Strahlmann
Builder EF Marine
First Built 2000
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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
18.29
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
22.74
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. 7.36
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
3.23
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
Rig Dimensions
I (Foretriangle Height) 43.4
J (Foretriangle Base) 12.17
P (Mainsail Luff) 40.52
E (Mainsail Foot) 14.04
SA Fore 264.09
SA Main 284.45
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