Moody 31 Mk I Sailboat Review, Specs, and Listings

Bill Dixon·1983 – 1985·Moody Yachts (A. H. Moody & Sons)
Moody 31 Mk I drawingBuilder drawing
Hull Type
Monohull · fin
Rig
Masthead Sloop
LOA
30.75' · 9.37 m
Disp.
9,966 lbs · 4,521 kg
First year
1983

The Moody 31 Mk I stands as one of Bill Dixon's early statements for A. H. Moody & Sons, a British family cruiser built in Southampton from 1983 to 1987 with 259 fiberglass hulls produced. Dixon, who had taken the design lead at Moody in 1981, shaped a 30foot 9inch boat that period assessments placed among the best 30footers of its era for comfort, seaworthiness, and build quality, citing thick hull laminates and solid teak joinery as the substance behind that reputation.

Measurements

Dimensions 01

Length Overall
30.75 ft
Length on deck
Waterline Length
25.42 ft
Beam
10.5 ft
Draft
5 ft
Maximum Headroom
Air Draft

Construction & hull 02

Construction
Fiberglass
Hull Type
Monohull
Keel Type
Fin
Rudder
1× Skeg-Hung
Ballast
3,675 lbs (Lead)
Displacement
9,966 lbs
Water Capacity
30 gal
Fuel Capacity
20 gal

Rig & sails 03

Rigging Type
Masthead Sloop
Mainsail luff
33.5 ft
Mainsail foot
11.5 ft
Foretriangle height
38.5 ft
Foretriangle base
12.5 ft
Forestay Length (estimated)
40.48 ft
Sail Area
433 sqft

Calculations 04

Sail Area to Displacement Ratio
14.96
Ballast to Displacement Ratio
36.88
Displacement to Length Ratio
270.86
Comfort Ratio
24.87
Capsize Screening Ratio
1.95
Hull Speed
6.76 kn

Design and Construction

At 30.75 feet overall with a 26-foot waterline, the Moody 31 carries a beam of 10.5 feet and a displacement near 9,921 pounds, balanced by 3,527 pounds of ballast for a ballast-displacement ratio close to 36 percent. The solid glass hull uses thick laminates and the deck is likewise solid, while below the joinery is teak. The keel is a modern fin with an optional twin-bilge version, paired to a skeg-hung rudder that gives balanced handling and protection. This is a Dixon-era Moody built under the family name in the early eighties.

Rig and Handling

The boat wears a masthead sloop rig that keeps sail management straightforward and delivers good all-around performance. The numbers behind the rig are modest but versatile: a mainsail of roughly 199 square feet on a 33.5-foot luff, a 115-percent jib near 233 square feet, and a 150-percent genoa at about 361 square feet. For offwind work the sail plan extends to a drifter of similar area and an asymmetrical spinnaker of 595 square feet, with a conventional spinnaker reaching 736 square feet and a 60-percent storm jib of 83 square feet for heavy air. The skeg-hung rudder and fin or bilge-keel options keep her predictable in close quarters and forgiving for a cruising couple or family.

Accommodations

Inside, the Moody 31 is a spacious, practical cruiser sleeping six across a V-berth forward, saloon settees, and an aft cabin, with a galley and an enclosed head. The layout earns praise for excellent headroom and storage, unusual in a boat of this length, and the solid teak joinery gives the cabin a durable, settled feel rather than a lightweight production finish.

Known Issues

The thick hull laminates and solid teak joinery suggest a conservative build, and each individual used example should be surveyed on its own merits.

Refits and Ownership

Ownership of a Moody 31 Mk I means joining a small, defined group of 259 owners. The Volvo Penta MD2003 diesel of 28 horsepower on a shaft drive is a straightforward unit to service, and the simple masthead rig keeps running rigging and sail inventory easy to maintain or renew. The boat's reputation as a comfortable, seaworthy 30-footer of its era supports steady interest, though production ran from 1983 to 1987 and the design did not continue as a direct line under later Moody generations.

The Verdict

The Moody 31 Mk I is a Dixon-designed British cruiser that punches above its 30-foot length through conservative construction and a genuinely roomy interior. For a couple or small family seeking a well-built eighties cruiser with a forgiving helm and a practical cabin, it remains a considered choice.

Pros

  • Thick fiberglass hull laminates and solid teak joinery
  • Spacious interior for six with excellent headroom and storage
  • Balanced handling from fin or bilge keels with skeg-hung rudder
  • Straightforward masthead rig with broad sail-range options

Cons

  • Production limited to 259 hulls from 1983 to 1987
  • Each hull should be surveyed individually

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