Hull Form and Construction
Douglas anchored the 350's character in a single, radical choice: thirteen feet of beam on a 35-foot hull, producing a length-to-beam ratio of 2.71 and an interior volume that felt alien alongside its fleet-mates. To avoid turning that beam into dead weight, he gave the hull a fine entry, sharp knuckle at the bow, and a long run aft with shallow rocker — a shape he describes as "slippery." The beam is carried almost fully aft, which deepens the cockpit and grows the swim platform but does raise the center of buoyancy in a way that demands an effective rudder to stay honest.
The hull is solid hand-laid fiberglass with a vinylester skincoat over layers of chop, mat, and roving, and the deck is cored with end-grain balsa from half to three-quarters of an inch depending on location. Catalina stiffens the structure with a separate fiberglass sub-sole grid bonded to the hull before the interior liner is dropped in — a checkerboard of athwartships beams and longitudinal stringers that disperses loads from the shrouds while providing support for the mast, engine, and tanks. Chainplates attach to ball sockets at the base of the cabin rather than penetrating the deck, avoiding the chronic problem of leaks at the intersection of deck, shrouds, and chainplates. Wiring and plumbing run in conduits throughout, a feature Douglas introduced to simplify future maintenance.
Rig and Handling
The masthead sloop carries an I measurement of 46 feet 9 inches — identical to the Catalina 36 MkII — and a mainsail P of just under 41 feet, producing 276 square feet of main area, ten square feet more than the 36-footer. Total 100-percent foretriangle-plus-main sail area comes to roughly 613 square feet, giving the 350 a sail-area-to-displacement ratio that falls comfortably in the "reasonably good performance" band rather than anywhere near a racing number.
On deck, all halyards, the vang, and sail controls are clustered at the mast base and led through ball-bearing blocks to sheet stoppers and winches atop the cabin. The main traveler sits forward of the companionway, producing mid-boom sheeting — the traveler is out of the cockpit, but trimming the mainsail requires more power and leech control is reduced. Genoa track is set inboard, and the wide side decks allow movement forward without stepping over hardware. Self-tailing Harken winches handle both primaries and halyards; electric versions were available as options. The dodger attaches to a molded-in lip on the cabintop.
On the water the 350 demonstrates the competence of a well-balanced cruising sloop. A reviewer testing the boat in Lake Michigan conditions found it quick through stays and losing remarkably little speed in tacks, and the boat handled confidently both off the wind and when pushed by a puff that put it on its ear. The caveat is real, though: in-mast furling without battens is estimated to reduce effective sail area by about seven percent, and multiple test reports confirmed that the setup in light air is underwhelming. Owners who switched to a full-batten main reported sailing to within 30 degrees of apparent wind at 5 knots in 8 knots of true wind, and touching 7 knots on a reach in 18 knots.
Accommodations
Below decks the 350 makes its case decisively. The main cabin measures 9 feet 6 inches on the centerline from the companionway to the port bulkhead, with an athwartships width at the backs of settees of 10 feet 5 inches — a dimension Douglas himself compared to an average apartment bedroom. Headroom is 6 feet 9 inches, achieved by lowering the cabin sole rather than elevating the cabin sides, which keeps the silhouette low and the sheer line moderate while avoiding the boxy look that afflicts some wide-body competitors. The tradeoff is a shallower bilge.
The V-berth forward is an island configuration, measuring 59 by 77 inches and accessible from both sides — purpose-designed for a marina or anchorage, not for passage-making sleep. An aft quarterberth runs to 55 by 88 inches and includes a hanging locker. The saloon seats six at the dining table and the settee arrangement is flexible: the starboard settee can be bisected by a drop-down teak game table or converted to a full-length berth. The U-shaped galley includes a two-burner stove-oven, a divided refrigerator-freezer with both front- and top-access doors, deep double sinks, and a cutout above the stove sized for an optional microwave. The head is a full-sized compartment with a separate enclosed shower stall. A built-in television cabinet came standard.
Known Issues and Limitations
The Practical Sailor test raised a performance concern that subsequent owners validated: the combination of in-mast furling and an unbattened main makes it extremely difficult to induce shape. In the magazine's own test sail in 6-to-8 knots, the boat could not exceed 3.5 knots on any point of sail — a result that the factory acknowledged as consistent with the sail system's inherent limitations rather than a hull defect. Owners who prioritize sailing speed consistently found the full-batten main with slab or in-boom reefing to be the correct specification.
Practical Sailor also noted workmanship issues consistent with the broader Catalina production ethic of the era: insides of cabinets sometimes revealed unfinished fiberglass, and cabinet doors and drawers were often misaligned. These are fitting-out complaints, not structural ones. The pre-tapped aluminum deck plates used instead of through-bolted backing plates prevent deck leaks effectively but become a significant headache if the threads get stripped, galled, or corroded.
The wide stern and carried-aft beam contribute to one ergonomic awkwardness: the helm position is most comfortable standing alongside the trimmer, which works well shorthanded but gives less helmsman separation than traditional layouts. The capsize screening formula of 2.22 places the 350 above the 2.0 threshold that suggests blue-water confidence; it is a coastal and near-offshore cruiser by design and numbers, not an offshore passagemaker.
Refit Priorities
The single highest-return refit on a 350 is the mainsail. Buyers considering in-mast furling would do well to consider in-boom alternatives, or better yet a slab-reefing system with lazy jacks — this single change transforms the boat's light-air behavior. A gennaker or asymmetric spinnaker adds useful power off the wind without complicating the rig.
The Yanmar diesel driving a two-blade fixed propeller is well-suited to the displacement and delivered 5 to 6 knots at three-quarter throttle in testing, a figure that matches the 350's coastal cruising profile. The engine compartment is heavily insulated — testers reported being able to converse at normal voice levels while motoring — so engine access rather than noise is the priority concern for maintenance. The Maxwell electric windlass is standard equipment and should be inspected for corrosion at any survey.
Below, the island V-berth works well at dock but benefits from lee cloths or a canvas filler insert to make it comfortable under sail. The navigation station table, at roughly 25 by 29 inches, reflects the tendency of today's skipper to rely on electronics at the helm rather than full-sized charts — electronic chart upgrades are typically more useful than a larger nav table.
The Verdict
The Catalina 350 is a very specific proposition executed with self-awareness. Gerry Douglas knew he was trading performance ceiling for interior volume, and the production record suggests he correctly identified a large segment of the market that would make exactly that trade. For a couple sailing shorthanded, the ease of handling, large cockpit, and maximum stowage make the 350 capable and liveable in a way that a more performance-oriented 35-footer cannot match. For sailors who still care about boatspeed, the correct answer is a full-batten main from day one and realistic expectations about what the hull shape will deliver in light air.
Pros
- Exceptional interior volume for a 35-foot monohull; apartment-sized saloon with 6-foot-9 headroom
- Shorthanded-friendly deck layout with all controls led aft and inboard genoa track on wide side decks
- Well-balanced helm and confident motion in a seaway despite the wide beam
- Full-batten main owners report competitive light-air numbers
- Heavily insulated engine compartment
- Large, feature-rich cockpit with a practical lazarette
Cons
- In-mast furling without battens produces poor light-air sail shape; full-batten main is nearly mandatory for acceptable performance
- Capsize screening formula above 2.0 limits offshore suitability
- Mid-boom sheeting requires more trim effort and reduces leech control
- Island V-berth is designed for marina use, not sea berths
- Fitting-out quality typical of Catalina's production era: cabinet interiors and hardware alignment variable
- Pre-tapped aluminum deck hardware inserts can corrode and become difficult to service
