The Neptune 24 CB, a quintessential pocket cruiser from the heyday of Capital Yachts Corporation, represents a successful blend of trailerable convenience and genuine coastal cruising capability. Launched during the mid-1970s, this 24-foot fiberglass monohull was designed to offer the "big boat" feel of the larger Newport series in a package that could be easily managed by a small crew or family. Its "CB" designation stands for centerboard, a design choice that significantly broadens the boat’s cruising grounds to include thin-water estuaries and allows for easier recovery onto a trailer. While the builder, Capital Yachts, is often synonymous with the Gary Mull-designed Newport line, the Neptune series served as their accessible, versatile entry-level fleet, emphasizing utility and interior volume over raw racing performance.
Neptun 24 CB Information, Review, Specs

- Make
- Neptun
- Model
- 24 CB
- Builder
- Capital Yachts Inc.
- Designer
- Capital Yachts Inc.
- Number Built
- Production Year(s)
- 1978 - ??
Sailing Performance & Handling
The sailing characteristics of the Neptune 24 CB are defined largely by its centerboard configuration and masthead sloop rig. With the board up, the vessel draws very little water, making it an ideal candidate for gunkholing in regions like the Chesapeake Bay or the Florida Keys. When the board is lowered, it provides the necessary lateral resistance to tack reasonably well, though it lacks the stiffness of a deep-keel racer. Owners generally describe the boat as forgiving and stable, a result of its relatively generous beam for its length.
The boat’s Displacement to Length (D/L) ratio and Sail Area to Displacement (SA/D) ratio place it firmly in the "cruiser" category. It requires a decent breeze to come alive, as the hull is built with the robust, heavy fiberglass layups typical of Capital Yachts' California factory. In heavy air, the Neptune 24 behaves predictably, though like many boats with a centerboard trunk, there can be a slight rumble or vibration if the board is not properly shimmed or if the pennant is loose. It is not a high-pointing boat, but it maintains a steady track and offers a secure motion that belies its 24-foot stature.
Interior Comfort & Variations
For a vessel of its size, the Neptune 24 CB offers an interior that feels remarkably spacious, thanks in large part to its "pop-top" feature. This design element allows the coachroof to be raised while at anchor, providing standing headroom that is otherwise impossible in a trailerable 24-footer. The layout typically includes a V-berth forward, a compact galley, and a settee arrangement that can often be converted into additional sleeping quarters.
Capital Yachts utilized the same hull for the Neptune 24 to create a few variations, most notably the fixed-keel version, which traded trailerability for slightly better upwind performance and a lower center of gravity. Internally, the use of teak accents and molded fiberglass liners was standard, reflecting the builder's commitment to a clean, low-maintenance aesthetic. The sibling Neptune 26 offered a similar design philosophy but with more dedicated storage for extended cruising, while the smaller Neptune 16 served as the fleet's daysailer.
Known Issues & Buyer’s Checklist
Prospective buyers of a Neptune 24 CB should focus their inspection on the specific mechanical and structural points common to this era of Capital Yachts' production:
- Centerboard Mechanism: The most critical inspection point is the centerboard trunk and the lifting pennant. Over decades, the pivot pin can wear, or the pennant can fray. Inspect for leaks around the trunk assembly and ensure the board moves freely through its arc without binding.
- Pop-Top Seals: The pop-top is a great feature but a common source of leaks. The vinyl or canvas "tent" sides and the rubber gaskets often degrade over time. Check for water staining on the interior liner around the coachroof opening.
- Mast Step Compression: Like many boats with a deck-stepped mast, the Neptune 24 can suffer from compression if the structural support beneath the mast (often a wooden compression post or bulkhead) has rotted or settled. Look for a "frown" or depression in the deck around the mast base.
- Bulkhead Chainplates: Check the areas where the chainplates attach to the bulkheads. Water can seep down the chainplates and rot the plywood bulkheads, compromising the structural integrity of the rig.
Community & Resources
Owners of Capital Yachts vessels benefit from a long-standing, albeit decentralized, community of enthusiasts. While the manufacturer ceased operations in 1996, technical information is often preserved through the Newport-Neptune Owners Association. This group and various regional technical wikis serve as repositories for original brochures and owner-submitted repair guides, particularly concerning the specific hardware used in the California plant.
The Verdict
The Neptune 24 CB remains a highly relevant choice for sailors who demand a balance between a "real" cabin and the ability to explore shallow waters. It is a sturdy, honest boat that reflects the practical design philosophy of Capital Yachts.
Pros
- Versatility: The centerboard allows for shallow-water exploration and easy trailering.
- Headroom: The pop-top feature provides standing room rarely found in this size class.
- Construction: Built with a heavy fiberglass layup that has proven durable over many decades.
Cons
- Upwind Performance: The centerboard and cruiser-oriented hull shape limit its ability to point high into the wind.
- Maintenance: The centerboard trunk and pop-top mechanisms add layers of mechanical complexity and potential leak points.
- Weight: It is heavy for a trailer-sailer, requiring a substantial tow vehicle.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Centerboard
- Rudder
- 1x —
- Ballast
- 1200 lbs
- Displacement
- 3200 lbs
- Water Capacity
- 15 gal
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 24 ft
- Waterline Length (LWL)
- 21 ft
- Beam
- 7.98 ft
- Draft
- 3.5 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Masthead Sloop
- P (Main Luff)
- 21.75 ft
- E (Main Foot)
- 9 ft
- I (Foretriangle Height)
- 27 ft
- J (Foretriangle Base)
- 9.58 ft
- Forestay Length (est)
- 28.65 ft
- Sail Area
- 250 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 18.42
- Ballast / Displacement Ratio
- 37.5
- Displacement / Length Ratio (D/L) Ratio
- 154.26
- Comfort Ratio
- 14.19
- Capsize Screening Formula
- 2.17
- Hull Speed
- 6.14 kn