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Millimeter
Designer: Bob Smith  ·  Builder: Millimeter Marine  ·  First built: 1983
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About the Millimeter

With extremely limited specifications available, the Millimeter sailboat presents a challenge for prospective buyers seeking detailed information about this vessel. The scarcity of published data suggests this may be either a lesser-known production boat, a custom design, or possibly a regional builder's offering that didn't achieve widespread distribution. Without concrete specifications to guide assessment, potential owners should approach this boat with thorough hands-on evaluation. The lack of readily available information means conducting a comprehensive survey becomes even more critical, as standard reference materials may not provide the usual benchmarks for comparison with similar vessels. Given the limited documentation, determining the boat's intended purpose—whether designed for coastal day sailing, weekend cruising, or more ambitious passages—requires careful examination of the actual vessel's construction, rigging configuration, and interior layout. The hull shape, keel design, and overall proportions would reveal much about the designer's intentions and the boat's likely performance characteristics. For serious buyers, connecting with previous owners, seeking out the original builder or designer, and consulting with marine surveyors familiar with similar vessels would be essential steps in understanding this boat's capabilities and quirks.

Core Dimensions
LOA (Length Overall) 12.50 ft / 3.81 m
Beam 3.00 ft / 0.91 m
Max Draft 2.33 ft / 0.71 m
Displacement 430.00 lb / 195 kg
Ballast 300.00 lb / 136 kg
Sail Area (Reported) 60.00 ft² / 5.57 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Bob Smith
Builder Millimeter Marine
First Built 1983
Related Sailboats ["Howmar 12" · "Phoenix 12" · "Zuma" · "Byte" · "Hobie One 12"]
Owner Reviews

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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
16.87
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
1.59
How It Compares

vs. Byte, Phoenix 12, Zuma

This boat Similar boats
Dimensions
LOA
Millimeter ★
12.5 ft
Byte
12.0 ft
Phoenix 12
12.0 ft
Zuma
12.8 ft
LWL
Millimeter ★
Byte
10.5 ft
Phoenix 12
11.7 ft
Zuma
12.4 ft
Beam
Millimeter ★
3.0 ft
Byte
4.3 ft
Phoenix 12
4.8 ft
Zuma
5.0 ft
Displacement
Millimeter ★
430 lbs
Byte
99 lbs
Phoenix 12
185 lbs
Zuma
129 lbs
Sail Area
Millimeter ★
60 sq ft
Byte
58 sq ft
Phoenix 12
Zuma
65 sq ft
Performance
SA / Displacement (higher = more powerful)
Millimeter ★
16.9
Byte
43.4
Phoenix 12
Zuma
40.8
Comfort Ratio (higher = more comfortable offshore)
Millimeter ★
Byte
2.0
Phoenix 12
Zuma
1.9
Capsize Screening (lower = safer)
Millimeter ★
1.59
Byte
3.68
Phoenix 12
Zuma
3.96
Displacement / Length (lower = lighter)
Millimeter ★
Byte
38
Phoenix 12
51
Zuma
30
Hull Speed
Millimeter ★
Byte
4.3 kts
Phoenix 12
Zuma
4.7 kts
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