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Sailboat Specifications

Mariah 31

Cutter · Long Keel W/Trans. Hung Rudder

Designed by Henry Morschadt · Built by Pacific Seacraft · First built 1977

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LOA 37.00 ft  ·  Beam 10.71 ft  ·  Displacement 16,000.00 lb  ·  Sail Area 656.00 ft²  ·  Cutter  ·  Long Keel W/Trans. Hung Rudder
About the Mariah 31 Sailboat

Designed by Henry Morschadt and built by Pacific Seacraft from 1977 to 1983, this traditionally-styled cruiser represents classic 1970s offshore sailing design philosophy. With only 89 hulls produced during its six-year production run, the Mariah 31 has become a sought-after example of quality fiberglass construction from one of the West Coast's most respected builders. The boat's substantial 16,000-pound displacement and generous 6,000-pound ballast provide the stability and seaworthiness that made Pacific Seacraft famous among serious cruising sailors. Her long keel configuration with transom-hung rudder delivers predictable tracking and self-steering capabilities highly valued for offshore passages, though at some cost to maneuverability in tight quarters. Rigged as a cutter with 656 square feet of working sail area, she offers excellent sail handling options for varying conditions. The cutter rig's versatility shines in heavy weather, allowing crews to balance the boat effectively with different sail combinations. Her impressive 36.75 comfort ratio and conservative 1.7 capsize screening value clearly position this design for serious offshore cruising rather than coastal day sailing. The Mariah 31 appeals to sailors prioritizing seaworthiness and traditional sailing characteristics over speed or spaciousness.

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Dimensions & Specifications
LOA (Length Overall) 37.00 ft / 11.28 m
LWL (Waterline Length) 25.00 ft / 7.62 m
Beam 10.71 ft / 3.26 m
Max Draft 4.42 ft / 1.35 m
Displacement 16,000.00 lb / 7,257 kg
Ballast 6,000.00 lb / 2,722 kg
Sail Area (Reported) 656.00 ft² / 60.94 m²
Headroom 6.42 ft / 1.96 m
Design & Construction
Hull Type Long keel w/trans. hung rudder
Rigging Type Cutter
Construction FG
Designer Henry Morschadt
Builder Pacific Seacraft
First Built 1977
Last Built 1983
Number Built 89
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Engine & Accommodations
Fuel Capacity 35 gals / 132 L
Water Capacity 70 gals / 265 L
Frequently Asked Questions

What is the Mariah 31's sail area to displacement ratio?

The Mariah 31 has a Sail Area to Displacement ratio (SA/D) of 16.59. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Mariah 31's comfort ratio?

The Mariah 31 has a Ted Brewer Comfort Ratio of 36.75. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Mariah 31 safe for offshore sailing?

The Mariah 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 Mariah 31?

The theoretical hull speed of the Mariah 31 is 6.70 kn knots, calculated from its waterline length.

How much does a Mariah 31 weigh?

The Mariah 31 has a displacement of 16,000.00 lb and a length overall (LOA) of 37.00 ft.

Who designed the Mariah 31?

The Mariah 31 was designed by Henry Morschadt, first built in 1977.