Design and Construction
The 470's hull is solid fiberglass, and the swing keel lets the boat settle to roughly 3.3 feet of draft when raised, opening shallow marinas and anchorages that would be closed to a fixed-keel 47-footer anchor. With the keel down she draws just over ten feet, giving her the lateral grip and righting moment expected of a bluewater design. The capsize screening value of 1.74 means that by that formula alone she would be accepted to participate in ocean races, and the displacement-length ratio of 216 categorizes her among moderate racers — a telling indication that Jones balanced cruising weight against a hull that is not sluggish to drive. Her immersion rate of about 2,183 pounds per inch speaks to the sheer mass in the hull, while a Motion Comfort Ratio of 37.1 suggests a settled ride in a seaway rather than a skittish one.
Rig and Handling
The boat is built with a fractional sloop rig and a sail-area-to-displacement ratio of 14.64, a figure that supports balanced performance under canvas without demanding a large crew. The wetted surface of the hull measures about 796 square feet, which together with the 8.8-knot theoretical displacement hull speed frames her top-end expectations under sail. Sheet specifications are generous and tell their own story about rig scale: the mainsheet runs 117.7 feet at 5/8-inch diameter, while jib and genoa sheets are both 47.1 feet on the same diameter, and the spinnaker sheet stretches 103.6 feet anchor. Those lengths confirm a big, powerful deck plan where leading and trimming loads were engineered for sustained offshore use rather than dockside convenience.
Accommodations
The available record does not describe the interior arrangement in detail, but the 470's displacement, beam, and three-cabin owner layouts seen in the broader market indicate a volume-driven cruising interior rather than a stripped racer. Southerly's lineage through the 2010s centered on comfortable liveaboard cruisers, and her tankage of 129 gallons of water alongside 174 gallons of diesel reinforces that she was conceived for passages and extended stay aboard rather than coastal hops.
The Verdict
The Southerly 470 is a thoughtfully proportioned Jones design that uses a swing keel to reconcile shoal-draft liberty with a heavy-displacement, seakindly hull. Her ratios — capsize screening, comfort, and displacement-length — paint a picture of a boat engineered to cross oceans yet still tuck into shallow coves. The core naval architecture is coherent and purposeful.
Pros
- Swing keel yields 3.3-foot raised draft for marina access anchor
- 1.74 capsize screening value meets ocean-race acceptance by formula
- 35 percent ballast ratio and 37.1 comfort ratio suggest stable, damped motion
- Fractional rig with 14.64 SA/D balances sail power and manageability
Cons
- Heavy 38,000-pound displacement limits light-air acceleration versus lighter cruisers
- Interior and systems documentation not described in available record
