Equinox is a recently built and slightly modified 36-foot Francis Herreshoff “Nereia” ketch strip-planked with cypress over yellow pine frames, fastened entirely with silicon bronze, and launched in 2000. She is a joy to the eye, solid underfoot, stable at sea, comfortable at anchor, meticulously kept, and cruise-proven by the owner and his wife who lived aboard and sailed the East Coast for ten years. The owner is deep into his seventies and still single-hands her around Tampa Bay and on the Gulf of Mexico.
She sleeps 2 comfortably in the queen-size v-berth with its 5-inch-thick laminated foam mattress. She will sleep and feed 4 in a pinch, and parties dozens (with photos to prove it).
Lots more information, contact details, and photos at:
www.svEquinox.info
Equipment: Ground tackle: 35# Bruce and 45# CQR at the bow with a big Danforth kedge in the lazzarette. Sails in great shape. The large galley includes a Corian counter-top, a 32-quart Engel AC/DC refrigerator, and a 3-burner ShipMate stove. The head is a new Jabsco installed in 2022.
Lots more information, contact details, and photos at:
www.svEquinox.info
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64)2/3
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
Details varied from the original Herreshoff design. Thanks to ‘the Skipper’ for providing a lot of extra information on this yacht, not yet included.
Fiberglass version by Nereia Yachts, Wilmington, DE USA.
This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.
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