Mason 33
Masthead Sloop · Long Keel · 1984–1989
A heavy-displacement long-keel masthead sloop designed by Al Mason for stable, comfortable offshore cruising
Designed by Al Mason & Alvin Mason, built by TA Shing Yacht Building (Taiwan).
- LOA
- Beam
- Draft (max)
- Displacement
- Ballast
- Hull type
- Long Keel
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
Her heavy displacement on a moderate beam gives 33 — a sea-kindly motion in a seaway.
1.79 — just under the 2.0 offshore line; her beam is modest for her weight.
388 — very heavy for her waterline, a serious load-carrying cruiser.
16.6 — moderate power for her weight; steady, all-round performance.
37% of her weight is ballast — moderately stiff, a middle-of-the-road stability.
A capable cruiser that sits just inside the offshore line — coastal work with real passages in her.
The record
Full specifications
The complete reference set — tap any figure to switch between metric and imperial.
Boats like this, on the water
Nobody has filmed this one — but these are close.
Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.
The family
Related models
The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.
Keep looking
Nothing filmed of this one yet
Two ways to keep looking — both search what the fleet has actually recorded.
The newsletter
New boats, new stories, from everywhere.
One email from the fleet — boats newly added, videos newly analyzed. No noise.