The Nauticat 33, a popular live-aboard ketch, was designed by W. Aarnipalo and built in Finland by Siltala Yachts.
Published Specification for the Nauticat 33
Underwater Profile: Long keel
Length Overall: 33'2" (10.1m)
Waterline Length: 28'2" (8.6m)
Beam: 10'8" (3.3m)
Draft: 5'1" (1.6m)
Displacement: 17,250lb (7,824kg)
Ballast: 5,150lb (2,336kg)
Construction: GRP (fiberglass)
Built by: Siltala Yachts (Finland)
Designed by: W. Aarnipalo
First Built: 1967
Last Built: 1996
Number Built: 1,160
'Odyssey', a Nauticat 33 Sailboat for Sale
Although 'Odyssey' is no longer available, the excellent pics and informative text in the original ad are retained here for the benefit of anyone researching this popular liveaboard motorsailer.
1. Sail Area/Displacement Ratio: 11.4
2. Ballast/Displacement Ratio: 29.9
3. Displacement/Length Ratio: 344
4. Comfort Ratio: 38.4
5. Capsize Screening Formula: 1.7
read more about these all-revealing numbers...
1. A Sail Area/Displacement Ratio of just 11.4 suggests that the Nauticat 33 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.
2. A Ballast/Displacement Ratio of 29.9 means that unless the bulk of the ballast is concentrated in a bulb at the foot of her keel, the Nauticat 33 will have a tendency to heel excessively in a gust, and she'll need to be reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of 344, tells us the Nauticat 33 is clearly a heavy displacement cruising boat. You can load her down with all your cruising gear and equipment and it will hardly affect her waterline. Not an ideal choice for coastal sailing, but she'll come into her own on an offshore passage in testing conditions.
4. Ted Brewer's Comfort Ratio of 38.4 suggests that crew comfort of a Nauticat 33 in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.
5. The Capsize Screening Formula (CSF) of 1.7 tells us that a Nauticat 33 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
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