Spanker 42 Information, Review, Specs

Spanker 42 Drawing
Make
Spanker
Model
42
Builder
Southern Ocean Shipyard
Designer
E. G. van de Stadt
Number Built
Production Year(s)
1972 - ??

The Spanker 42 is a robust, offshore-capable cruiser born from the collaboration between the legendary British builder Southern Ocean Shipyard Ltd. and the innovative design office of Van de Stadt Design. While Southern Ocean Shipyard is perhaps most famous for the pioneering Gallant 53 and the massive Ocean 71, the Spanker 42 represents a more focused application of E.G. van de Stadt’s "fast cruiser" philosophy. Built during an era when Southern Ocean Shipyard was transitioning to high-specification glass-reinforced plastic (GRP) construction, the Spanker 42 was engineered to meet or exceed Lloyd’s standards, ensuring a hull of immense structural integrity. This model is often identified by its distinctive hull lines—a hallmark of Van de Stadt’s influence—which aim to balance the displacement required for blue-water voyaging with a hull shape that remains efficient in a variety of sea states.

Sailing Performance & Handling

The Spanker 42 is characterized by a high displacement-to-length ratio, reflecting its mission as a serious ocean-going vessel rather than a coastal racer. Under sail, the boat exhibits the steady, predictable motion typical of Southern Ocean’s heavy-displacement builds. Its ballast ratio is significant, providing high initial stability and a stiff sailing attitude that allows it to carry full canvas longer than many modern, lighter-displacement equivalents.

Handling is defined by the Van de Stadt rudder configuration, which, even in the 1970s and 80s, prioritized a balanced feel to reduce helm fatigue during long passages. Owners often report that the Spanker 42 tracks exceptionally well, a byproduct of its deep-fin or long-keel variants and substantial wetted surface area. While it may require a freshening breeze to truly "wake up"—a common trait among 42-footers of this era—it maintains momentum through chop with ease. Technical data from the era suggests a Sail Area/Displacement ratio that favors heavy-weather reliability over light-wind agility, making it a favorite for high-latitude cruising.

Interior Comfort & Variations

True to the Southern Ocean Shipyard reputation for luxury and durability, the interior of the Spanker 42 is typically finished in high-quality hardwoods, such as teak or mahogany. The layout was designed for extended living aboard, featuring a substantial galley, a dedicated navigation station, and generous headroom that often exceeds 6'3". Most iterations of the 42-foot hull utilized a center-cockpit configuration, which allowed for a private, full-width aft cabin—a significant selling point for cruising couples.

Variations of the hull were sometimes tailored to the original owner's requirements, a common practice at the Poole shipyard. While the core "Spanker" design focused on a sloop or cutter rig for simplicity and performance, some sibling models built on similar 42-foot molds were configured as ketches to break up the sail area for easier short-handed handling. The craftsmanship of the cabinetry is a recurring theme in editorial retrospectives, with the joinery serving as both a functional living space and a structural reinforcement for the GRP hull.

Known Issues & Buyer’s Checklist

Prospective buyers of a Spanker 42 should focus their inspection on the longevity of the GRP materials and the standing rigging. Although Southern Ocean Shipyard used hand-laid, marine-grade polyester, boats of this vintage are susceptible to osmotic blistering if they have not been treated with modern epoxy barriers. A moisture meter test of the hull below the waterline is essential.

The deck construction typically utilizes a core material for stiffness; over decades, moisture ingress around stanchion bases or deck hardware can lead to core delamination. Buyers should walk the side decks specifically feeling for "soft spots." Furthermore, given the boat's offshore pedigree, the chainplates and the mast step—often steel components—should be inspected for corrosion or fatigue. Finally, the original plumbing and electrical systems in these vessels were complex for their time; unless a previous owner has performed a comprehensive refit, expect the need for an electronics and wiring overhaul to meet modern safety standards.

Community & Resources

While Southern Ocean Shipyard ceased operations in 1987, the legacy of their vessels is maintained by a dedicated community of offshore enthusiasts. Owners of the Spanker 42 and its siblings often share technical knowledge through the Van de Stadt Owners’ Association, which provides archival support for the designer's various hull numbers. Information regarding original build specifications can sometimes be sourced through the technical archives of the Poole Maritime Museum, which retains records of the shipyard's historical impact on the Dorset region.

The Verdict

The Spanker 42 is a "sailor’s sailboat," designed for those who value structural redundancy and sea-kindliness over modern interior volume or light-air speed. It stands as a testament to the golden age of British boat building.

Pros:

  • Exceptional build quality with hulls often built to Lloyd’s specifications.
  • Proven blue-water capability with a comfortable motion in heavy seas.
  • High-quality interior joinery that provides a warm, traditional aesthetic.
  • Reliable tracking and stability for long-distance passage making.

Cons:

  • Heavy displacement results in sluggish performance in light winds (under 10 knots).
  • Maintenance of older GRP and complex systems can be costly.
  • Deep draft may limit access to some shallow coastal cruising grounds.
  • Limited availability on the brokerage market due to low production numbers.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Spade
Ballast
9008 lbs
Displacement
21716 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
42.26 ft
Waterline Length (LWL)
32.82 ft
Beam
12.24 ft
Draft
7.09 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Masthead Sloop
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
1055 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
21.68
Ballast / Displacement Ratio
41.48
Displacement / Length Ratio (D/L) Ratio
274.23
Comfort Ratio
33.5
Capsize Screening Formula
1.76
Hull Speed
7.68 kn