Built in the 1970s by Alcona Marine in Michigan, this 31-foot sailboat represents a practical approach to Great Lakes cruising and coastal sailing. While detailed specifications remain scarce, the Alcona 31 was designed during an era when builders focused on creating sturdy, no-nonsense cruising boats for sailors who valued reliability over racing performance. The boat's moderate proportions suggest it was intended for comfortable weekend cruising and short-term coastal adventures rather than aggressive racing or extended offshore passages. Like many vessels from this period, the Alcona 31 likely features a traditional full or modified full keel configuration, providing good tracking ability and predictable handling characteristics that would appeal to cruising sailors. Alcona Marine's limited production run means these boats are relatively rare finds in today's market. The scarcity of available information reflects both the builder's smaller scale operations and the passage of time since production ceased. For potential buyers, this presents both an opportunity to own a unique vessel and the challenge of evaluating a boat with limited documentation. Prospective owners should expect to rely heavily on professional surveys and hands-on inspection when considering an Alcona 31.
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What is the Alcona 31's sail area to displacement ratio?
The Alcona 31 has a Sail Area to Displacement ratio (SA/D) of 15.38. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the Alcona 31's comfort ratio?
The Alcona 31 has a Ted Brewer Comfort Ratio of 32.73. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the Alcona 31 safe for offshore sailing?
The Alcona 31 has a Capsize Screening Formula value of 1.7. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the Alcona 31?
The theoretical hull speed of the Alcona 31 is 6.38 knots, calculated from its waterline length.
How much does a Alcona 31 weigh?
The Alcona 31 has a displacement of 10,350.00 lb and a length overall (LOA) of 31.25 ft.
Who designed the Alcona 31?
The Alcona 31 was designed by Edward S. Brewer, first built in 1979.