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Sailboat Specifications

Idem

Gaffhead Sloop · Centerboard (Trunk)

Designed by Clinton Crane · Built by St. Lawrence Boat Co. · First built 1897

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LOA 32.00 ft  ·  Beam 8.00 ft  ·  Displacement 6,800.00 lb  ·  Sail Area 600  ·  Gaffhead Sloop  ·  Centerboard (Trunk)
About the Idem Sailboat

Designed by renowned naval architect Clinton Crane in 1897, this classic gaffhead sloop represents an elegant example of turn-of-the-century yacht design. Built exclusively by St. Lawrence Boat Co. over more than a century of production, only thirteen of these distinctive vessels were ever constructed, making the Idem a rare find for collectors and traditional sailing enthusiasts. The boat's traditional wood construction and gaff-rigged sloop configuration deliver authentic period sailing characteristics, while the centerboard trunk design provides versatility in both shallow and deeper waters. With a displacement of 6,800 pounds and relatively light ballast of just 600 pounds, the design relies on the centerboard for stability and lateral resistance rather than a heavy keel. This combination makes the Idem well-suited for protected coastal waters, bay sailing, and gunkholing where shoal draft capabilities prove valuable. The comfortable 28.75 comfort ratio suggests reasonable motion in moderate seas, though the low ballast ratio indicates this design favors gentler conditions over aggressive offshore passages. Clinton Crane's reputation for creating refined, seaworthy designs is evident in the Idem's proportions and enduring appeal to traditionalists seeking an authentic vintage sailing experience with classic gaff rig handling characteristics.

Dimensions & Specifications
LOA (Length Overall) 32.00 ft / 9.75 m
LWL (Waterline Length) 19.00 ft / 5.79 m
Beam 8.00 ft / 2.44 m
Max Draft 4.00 ft / 1.22 m
Min Draft 1.90 ft / 0.58 m
Displacement 6,800.00 lb / 3,084 kg
Ballast 600.00 lb / 272 kg
Ballast Type Lead
Sail Area (Reported) 600
Design & Construction
Hull Type Centerboard (Trunk)
Rigging Type Gaffhead Sloop
Construction Wood
Designer Clinton Crane
Builder St. Lawrence Boat Co.
First Built 1897
Last Built 2004
Number Built 13
Related Sailboats Eric 32 · Nicholson 32 · Contessa 32 · Seafair 32 · Chesapeake 32
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Frequently Asked Questions

What is the Idem's sail area to displacement ratio?

The Idem has a Sail Area to Displacement ratio (SA/D) of 26.83. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Idem's comfort ratio?

The Idem has a Ted Brewer Comfort Ratio of 28.75. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Idem safe for offshore sailing?

The Idem has a Capsize Screening Formula value of 1.69. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Idem?

The theoretical hull speed of the Idem is 5.84 knots, calculated from its waterline length.

How much does a Idem weigh?

The Idem has a displacement of 6,800.00 lb and a length overall (LOA) of 32.00 ft.

Who designed the Idem?

The Idem was designed by Clinton Crane, first built in 1897.