The Seadog 30, a heavy displacement ketch, was designed by Reg Freeman and built in UK by Reg Freeman Yachts Ltd.
Underwater Profile: Triple keel
Hull Material: GRP
Length Overall: 30'0" / 9.14m
Waterline Length: 24'0" / 7.32m
Beam: 9'6" / 2.9m
Draft: 3'6"/ 1.1m
Rig Type: Ketch
Displacement: 12,880lb / 5,842kg
Designer: Reg Freeman
Builder: Reg Freeman Yachts (UK)
Year First Built: 1966
Year Last Built: 1974
Number Built: 130
Owners Association: SeaDog Owners Association
1. Sail Area/Displacement Ratio: 14.9
2. Ballast/Displacement Ratio: 30.4
3. Displacement/Length Ratio: 416
4. Comfort Ratio: 38.5
5. Capsize Screening Formula: 1.6
read more about these all-revealing numbers...
1. A Sail Area/Displacement Ratio of just 14.9 suggests that the Seadog 30 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 30.4 means that unless the bulk of the ballast is concentrated in a bulb at the foot of her keel, the Seadog 30 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 416, tells us the Seadog 30 is firmly in the ultra-heavy displacement category. Load her up as much as you like and her performance will be hardly affected, not that it was ever startling. Few if any sailboats are built to this displacement category these days - but they remain popular with some long-distance sailors.
4. Ted Brewer's Comfort Ratio of 38.5 suggests that crew comfort of a Seadog 30 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 1.6 tells us that a Seadog 30 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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