Sea Moth II
Catamaran, asymmetric hulls · Fractional Sloop · First built 1966
A 15-foot Canadian-built catamaran derived from the Sea Spray, featuring an exceptionally high power-to-weight ratio
Designed by Allan J. Arnold, built by Various.
- LOA
- Beam
- Displacement
- Hull type
- Catamaran (No boards/asym.)
The record
Full specifications
The complete reference set — tap any figure to switch between metric and imperial.
Dimensions
Weights
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
70.9
Hull
Hull type
Catamaran (no boards/asym.)
Construction
Fiberglass
Production
Years built
First built 1966
Designer
Allan J. Arnold
Builder
various, AMF Corp
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.
Supercat 154.65 mSame hull familyNear-identical lengthA high-performance beach catamaran with a rotating spar and an exceptional sail-area-to-displacement ratio
Hobie 165.05 mSame hull family0.5 m longerThe most popular sailing catamaran ever built, featuring a rotating spar and boardless hull for high-speed beach sailing
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.
Minifish IIA lightweight 3.58-meter dinghy featuring an unstayed cat rig on the classic Minifish hullAmerican 2+2 Mini-TonA high-performance fractional mini-tonner with a centerboard, designed for light-air speed and agile handlingMach IIA lightweight 4.22-metre daggerboard dinghy featuring a traditional lateen rig on a hull shared with the Mach VAmerican 21 (AMI)An Arthur S. Henry-designed masthead sloop with a shallow 0.66m draft, built for shoal-water cruising since 1979
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.