International 35 Information, Review, Specs

Make
International
Model
35
Builder
International Marine
Designer
Eldredge-McInnis
Number Built
Production Year(s)
1961 - ??

The International 35 is a distinguished classic cruiser that represents a specific era of mid-century maritime engineering, characterized by robust scantlings and the elegant, functional lines typical of the Eldredge-McInnis design office. While the name "International Marine" is contemporary with the West Wight Potter lineage in California, the International 35 belongs to a distinct historical chapter of a similarly named East Coast entity that commissioned high-quality builds from Japanese shipyards, such as Far East Yacht Specialists, during the late 1950s and 1960s. These vessels were conceived as high-end alternatives to domestic production boats, offering the warmth of traditional mahogany and teak craftsmanship combined with the seaworthiness required for offshore passages.

Sailing Performance & Handling

As a heavy-displacement cruiser with a full keel and a traditional "Yankee" hull form, the International 35 is designed for stability and directional tracking rather than modern high-speed planing. The boat typically features a displacement-to-length ratio that places it firmly in the "heavy cruiser" category, which translates to a motion that is remarkably sea-kindly in a chop. Owners frequently report that the vessel "sails on rails," requiring minimal helm correction once the sails are properly trimmed.

The sail plan is usually a masthead sloop or occasionally a yawl rig, providing ample power to move her significant mass in moderate breezes. Because of its deep forefoot and long keel, the International 35 does not tack as quickly as a modern fin-keel boat, but it compensates with an ability to heave-to comfortably and maintain momentum through heavy head seas. Handling under power requires some acclimation, as the long keel and significant prop walk make backing in tight quarters a maneuver that demands patience and planning.

Interior Comfort & Variations

The interior of the International 35 is a showcase of traditional joinery, often featuring extensive use of tropical hardwoods that are rarely seen in modern production vessels. The layout is a classic offshore arrangement: a forward V-berth, a localized head compartment, and a main saloon with settee berths. In many hull iterations, the galley is located aft near the companionway for optimal ventilation and proximity to the cockpit during passages.

Several siblings were built on the same design philosophy, including the smaller International 25 and International 28, as well as the larger International 40. The 35-foot model was often seen as the "sweet spot" of the range, offering standing headroom (typically around 6'2") and enough storage capacity for extended coastal cruising. Variations in the interior often depended on whether the specific hull was commissioned as a racer-cruiser or a dedicated cruiser, with some featuring additional pilot berths in the saloon at the expense of locker space.

Known Issues & Buyer’s Checklist

Prospective buyers should approach the International 35 with a focus on its structural longevity, given the age of the fleet. A primary concern is the state of the hull-to-deck joint and the condition of the deck core. Many of these boats utilized a sandwich construction for the decks, and any unsealed hardware penetrations over the decades may have led to localized rot or delamination.

  1. Chainplate Anchors: Inspect the areas where the chainplates meet the wooden bulkheads. Moisture wicking in these high-load areas can cause structural degradation that is difficult to repair without significant cabinetry work.
  2. Keel Bolts: If the vessel is a fiberglass version with an encapsulated or bolted keel, the integrity of the keel-to-hull connection should be verified by a surveyor to check for "smile" cracks or oxidation of the bolts.
  3. Mast Step: On older wooden-masted versions, rot at the base of the mast or compression issues at the mast step on the cabin top are common.
  4. Original Plumbing/Wiring: Many International 35s still harbor original gate valves and glass-fuse electrical panels. These systems generally require a complete overhaul to meet modern safety standards.

Community & Resources

The primary repository for technical data and historical records for the International 35 is the Eldredge-McInnis collection, which is preserved and managed by the Mystic Seaport Museum. This archive provides access to original lines, sail plans, and construction specifications for those looking to perform authentic restorations. While there is no longer a dedicated "International Marine" builder support office for this specific model, owners often congregate in classic boat forums and regional wooden boat associations to share maintenance strategies for these aging but capable hulls.

The Verdict

The International 35 is a "sailor's sailboat" that appeals to those who prioritize aesthetic beauty and heavy-weather capability over interior volume and modern speed. It is a vessel that rewards a dedicated owner with a sense of pride and a level of comfort in a seaway that modern light-displacement boats cannot match.

Pros

  • Exceptional tracking and stability in heavy weather.
  • Timeless, elegant aesthetics that stand out in any harbor.
  • High-quality traditional joinery and craftsmanship.

Cons

  • Demands higher maintenance levels than modern fiberglass boats.
  • Limited maneuverability in reverse due to full-keel design.
  • Tight interior volume compared to modern 35-footers.

Measurements

Construction & Hull

Construction Material
Wood
Hull Type
Monohull Sailboat
Keel Type
Full
Rudder
1x Attached
Ballast
-
Displacement
14120 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
34.83 ft
Waterline Length (LWL)
25.67 ft
Beam
10 ft
Draft
4.75 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
556 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
15.23
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
372.66
Comfort Ratio
35.75
Capsize Screening Formula
1.66
Hull Speed
6.79 kn