Southerly 42/420 Information, Review, Specs

The transition from the 42RST to the 420 brought about subtle but important refinements. While the hull remained the same Humphreys-designed shape, the 420 introduced updated styling, revised window lines for better visibility, and modernized interior finishes. The builder also produced variations such as the Southerly 42RST "RS" and various custom timber options, ensuring that while the hull stayed consistent, the aesthetic could range from traditional teak to contemporary light oak.

Sailing Performance & Handling

Under sail, the Southerly 42/420 defies the stereotypes often associated with swing-keel boats. Because the airfoil-shaped keel is made of cast iron and weighs over 2,000kg, it provides significant righting moment when fully extended. This is further supported by a massive 3,000kg+ cast iron grounding plate that sits flush with the hull, lowering the center of gravity even when the keel is retracted. This configuration results in a surprisingly stiff boat with a high ballast ratio.

The use of twin rudders is a critical design choice, as noted by Yachting Monthly. These rudders are angled to provide exceptional grip when the boat is heeled, preventing the "rounding up" common in wide-stern cruisers. In light airs, the displacement of approximately 12,000 kg means she requires a decent breeze to get moving, but the tall fractional rig and optional self-tacking jib make for easy handling. When the wind picks up, the boat tracks straight and feels "planted," a sensation reinforced by the Rob Humphreys hull which balances volume with a fine entry to reduce slamming in a head sea.

Interior Comfort & Variations

The interior of the Southerly 42 series is defined by its split-level layout. By placing the engine and technical systems under the raised saloon floor, the designers maximized living space and provided panoramic views through the deck-saloon windows. This "raised" configuration is not just for aesthetics; it allows the navigator to monitor the surroundings from a protected, internal helm or chart table, which is a major draw for long-distance voyagers.

The standard configuration typically features a three-cabin layout. The master aft cabin is a standout feature, utilizing the full beam of the boat to offer a center-line queen berth, extensive hanging lockers, and an en-suite head with a separate shower stall. The forward VIP cabin and a smaller twin bunk cabin or storage area provide ample room for guests. The 420 variant often features "Linear Galley" or "L-shaped" options depending on whether the owner prioritized counter space or floor area. Throughout both models, Northshore’s reputation for high-quality joinery is evident in the solid wood capping and hand-fitted cabinetry.

Popular Mentions & Media

The Southerly 42RST gained significant recognition in the mid-2000s, winning several "Boat of the Year" accolades across Europe and North America for its innovative keel system. It has become a favorite among high-latitude explorers and coastal cruisers alike, often featured in technical sailing documentaries focused on "drying out" in locations like the Channel Islands or the Bahamas. The boat's ability to remain upright on a sandy bottom while the tide recedes has made it a frequent subject for marine photography in yachting journals.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their due diligence on the specialized systems that make a Southerly unique.

1. Keel Pennants and Hydraulics: The keel is raised via a hydraulic ram and high-strength pennants. These cables are wear items and should be inspected for fraying or corrosion. The hydraulic pump and its reservoir require regular fluid checks to ensure the keel can be locked in the "up" or "down" position.
2. Grounding Plate Integrity: The cast iron grounding plate is exposed to the elements and can suffer from "blooming" or rust if the epoxy coating is breached. Buyers should check for significant scaling or signs of impact that could affect the hull-to-plate seal.
3. Twin Rudder Alignment: Because the rudders are exposed when the keel is up, they are more vulnerable to damage if the boat settles on uneven ground. Check for play in the bearings and ensure the linkage between the two rudders is synchronized.
4. Window Sealing: The large panoramic windows in the deck saloon are prone to leaks if the original sealant has degraded. Look for water staining on the woodwork around the navigation station and saloon seating.
5. Copper Coating: Many Southerlys were factory-fitted with Coppercoat on the hull and keel. If present, verify the thickness and condition, as recoating the swing keel requires specialized dry-docking procedures.

Community & Resources

The Southerly Owners Association (SOA) is the primary resource for technical data and community support. It is one of the most active owner groups in the UK and Europe, providing an extensive library of manuals, modification guides, and a registry of hull numbers. The association often organizes rallies where owners can share experiences regarding the maintenance of the unique swing-keel system.

The Verdict

The Southerly 42/420 is a rare breed of yacht that offers "no-compromise" blue water capability alongside "go-anywhere" draft flexibility. It is ideally suited for the experienced cruiser who wishes to explore shallow estuaries without sacrificing the ability to cross oceans in comfort.

Pros:

• Ultimate Versatility: The ability to sail in less than 3 feet of water or dry out on a beach.
• Blue Water Build: Substantial displacement and a Rob Humphreys hull provide security in heavy weather.
• Visibility: The raised saloon offers exceptional natural light and 270-degree views from the interior.
• Redundancy: Twin rudders and a robust mechanical keel backup system.

Cons:

• Complexity: The hydraulic swing keel adds a layer of maintenance not found on fixed-keel yachts.
• Initial Cost: These boats command a premium price on the used market due to their unique niche.
• Weight: At 12 tons, she is not a light-air racer and can feel sluggish in breezes under 8 knots.