Design and Construction
Maas drew the 33 as a solid-GRP hull with a sandwich-GRP deck, the latter detail doing real work below: the deck's insulated sandwich insulates against cold water and reduces condensation in the cabin, giving a drier interior climate than a single-skin deck would. The hull itself is single-skin fiberglass. With a length-to-beam ratio of 3.12 she is beamier than 58 percent of comparable designs, and the resulting volume shows in an above-average headroom and a mahogany interior. The displacement-length ratio of 297 places her among the "heavy cruisers," and only 31 percent of similar designs are heavier — a mass that pays dividends in motion comfort, where her ratio of 25.5 beats 54 percent of rivals.
Keel, Ballast, and Seakeeping
The fin keel draws between 6.14 and 6.44 feet depending on load, and the 38-percent ballast ratio sits higher than 34 percent of similar boats. That fin delivers splendid maneuverability at the helm but gives up some directional stability against a long-keel form. The capsize screening value of 1.92 is the figure that would, by that formula alone, admit her to ocean racing. A wetted surface near 312 square feet and an immersion rate of 921 pounds per inch describe a boat that sits heavily and responds slowly to loading — consistent with the cruiser weighting.
Rig and Handling
The 33 is a masthead sloop that is slightly overrigged for her size, carrying more sail plan than 58 percent of similar yachts. Her fin keel and spade rudder make her handy in tight quarters even as the keel trades off weathercock steadiness. Under power, a 27-horsepower Bukh diesel on a shaft drive pushes the hull to a calculated maximum of about 6 knots, just under the theoretical displacement hull speed of 6.7 knots. Halyard and sheet geometry is conventional for the era: mainsail and headsail halyards run about 101 feet at 3/8 inch, while sheets run 12 mm, the mainsheet at 82 feet and genoa sheets at just under 33 feet.
Accommodations
Below, the mahogany joinery and above-average headroom make the most of the beamy hull. The review notes the interior finish follows normal production-boat practice for the period. The sandwich deck's insulation against cold and condensation is a quiet but real liveaboard asset in northern waters, keeping the cabin drier than an uninsulated deck would allow.
The Verdict
The Standfast 33 is a thoughtfully engineered Maas cruiser: heavy enough to be steady, beamy enough to be roomy, and fin-keeled enough to be manageable in harbors, with a rig that leans slightly raceward of her weight class. She is a credible bluewater candidate by the numbers even if the fin keel asks for more helmsman attention than a long keel would.
Pros
- Sandwich deck insulates cabin against condensation and cold water
- Beamy hull (L/B 3.12) gives above-average space and headroom
- Capsize screening 1.92 qualifies her for ocean racing by formula
- Fin keel and spade rudder make for splendid maneuverability
Cons
- Fin keel has less directional stability than a long-keel design
- Heavy displacement means modest under-power speed near 6 knots
