With a fin keel, masthead-sloop rig, modest beam, and heavy displacement, the 360 sits firmly among the traditional offshore cruisers of its era. It was designed for steady, manageable sailing and life aboard in northern waters, not for racing around the buoys.
Design and Construction
The hull and deck are fibreglass. The deck uses sandwich construction to improve the indoor climate, as the original review recorded. That detail suits the boat’s Nordic origins, where controlling condensation matters alongside structural simplicity. The hull below is solid fibreglass, so there’s no cored bottom to survey for water ingress; the sandwich deck is the boat’s one composite structure.
The 360 displaces 15,432 pounds and carries 6,614 pounds of ballast in an iron keel, giving a ballast ratio of 43 percent. Its displacement-to-length ratio is 263, while the length-to-beam ratio is 3.15; the boat’s beam is 11.2 feet. Together, these figures describe a hull that is neither especially slender nor voluminous by modern standards.
The wetted surface is about 387 square feet. An immersion rate of roughly 1,179 pounds per inch indicates how stubbornly the boat holds its waterline as weight comes aboard. These are the numbers of a cruiser tuned for steadiness rather than sparkling acceleration.
The capsize screening value is 1.72, and the Motion Comfort Ratio ranges from 30 to 34. Those figures put the 360 in a reassuring band for a cruiser of this size.
Rig and Sailing
The Najad 360 carries a masthead-sloop rig. Its sail-area-to-displacement ratio is 13.8 using the ISO reference sail, rising to 16.2 with a 135 percent genoa. That’s enough sail to keep the boat moving in a breeze without requiring a masthead kite for everyday sailing, though the modest base ratio suggests limited light-air sparkle without the genoa.
The running-rig dimensions are generous. Halyards are about 103 feet long at half-inch diameter. Jib and genoa sheets measure 35 feet and change at 0.55 inch, while the mainsheet is 88 feet long. These sizes suit a boat intended for a small crew using adequate mechanical advantage. They also provide useful known quantities when it’s time to replace the running rig.
Owners considering a recut or a new working jib should note the effect of the 135 percent genoa on the sail-area-to-displacement ratio.
Engine and Motoring
The original engine choices centered on the Volvo Penta 2003 series. The specification record lists a 43-horsepower, shaft-drive diesel.
Under power, the Volvo Penta 2003 TD Turbo takes the boat to a measured 8.0 knots. A calculated maximum of about 6.4 knots applies to the non-turbo 2003 T. The theoretical hull-speed limit for the boat’s length is 7.4 knots. Power reaches the propeller through a conventional shaft-drive arrangement.
Accommodations
Below deck, the interior is finished in mahogany, following the Scandinavian cruiser convention of the period. The joinery uses the same material language found in many contemporary Swedish boats, giving the cabin a warm, enclosed feel that the sandwich deck helps keep temperate.
The 360’s layout is typical of a liveaboard-minded 35-footer.
Refit and Survey Considerations
The documented running-rig dimensions give owners a practical baseline when replacing halyards and sheets. The iron keel and solid-fibreglass hull remove the need to inspect a cored bottom for water ingress, though the sandwich deck remains a potential survey focus.
The original Volvo Penta 2003-series engine options and the boat’s conventional shaft drive are also central considerations for ownership and refit planning.
The Verdict
The Najad 360 is a straightforward, well-mannered cruiser from Karlsson’s mid-1980s drawing board and Najad’s Swedish yard. It was built to be lived with in northern waters, not to win buoy races. Its heavy displacement and high ballast ratio give it poise in a seaway, while the documented rig dimensions make rerigging easier to approach from known quantities.
Pros
- Iron fin keel with a 43 percent ballast ratio
- Steady Motion Comfort Ratio of 30–34
- Sandwich deck intended to improve cabin climate
- Solid-fibreglass hull below
- Well-documented running-rig sizes for straightforward replacement
Cons
- Modest sail-area-to-displacement ratio of 13.8 suggests limited light-air sparkle without a genoa
- The sandwich deck is the boat’s lone composite structure and a potential survey focus
