The Blue Crab 11 is a quintessential fiberglass utility dinghy that exemplifies the mid-century American transition toward accessible, low-maintenance recreational boating. Originally produced by Newport Boats and later by Lockley Newport and Gloucester Yachts, the Blue Crab 11 was designed as a versatile "three-way" boat, capable of being rowed, powered by a small outboard, or sailed. At approximately 11 feet 4 inches in length, it serves as a larger sibling to the 9-foot Sand Crab, offering a broader beam and increased displacement that makes it more suitable as a ship’s tender for larger cruisers or a stable platform for teaching children the fundamentals of sail trim.
Blue Crab 11 Information, Review, Specs

- Make
- Blue
- Model
- Crab 11
- Builder
- Mobjack Manufacturing Inc.
- Designer
- Harry R. Sindle
- Number Built
- 900
- Production Year(s)
- 1971 - ??
The vessel features a classic lapstrake-style fiberglass hull, which provides traditional aesthetics while offering the structural rigidity necessary for a beach-launched dinghy. Unlike the high-performance planing dinghies of its era, such as the Buccaneer 18, the Blue Crab 11 was engineered for stability and utility. It typically features a simple cat-rigged sail plan—a single mast stepped forward with a lone mainsail—making it exceptionally easy to rig and depower in fluctuating wind conditions.
Sailing Performance & Handling
The Blue Crab 11 is characterized by high initial stability, a byproduct of its relatively wide beam (approximately 4 feet 10 inches) and full-bodied hull sections. On the water, the boat feels secure and predictable, making it an ideal "confidence builder" for novice sailors. Because it lacks a jib, the center of effort is simplified, allowing the helmsperson to focus entirely on the mainsheet and tiller.
Tracking is managed by a kick-up rudder and a retractable centerboard. The centerboard design is a critical feature for a boat of this size, as it allows the Blue Crab to navigate extremely shallow waters and be pulled directly onto a sandy beach without damaging the hull. Under sail, the boat is not particularly fast; it is a displacement hull that struggles to plane except in very high winds with a light crew. Instead, it offers a stately, upright sailing experience. In technical reviews found in period Gloucester Yachts documentation, the boat is noted for its ability to carry a significant load—often rated for up to four persons—without losing its rowing lines or becoming dangerously tender.
Known Issues & Buyer’s Checklist
Prospective buyers of a vintage Blue Crab 11 should focus their inspection on the structural integrity of the fiberglass components, which may have suffered from decades of UV exposure or hard use as a tender.
- Centerboard Trunk: The most common "gotcha" on these models is a leak or hairline fracture at the base of the centerboard trunk. Because the trunk is a high-stress area, repeated grounding can cause the fiberglass to delaminate or crack.
- Mast Step Stress: The mast step in the forward thwart or the hull floor should be inspected for "spiderweb" stress cracks. As a cat-rigged boat, all the torque from the sail is concentrated on this single point.
- Woodwork Rot: While the hull is fiberglass, many units were finished with wooden thwarts (seats) and gunwales. If these have not been regularly oiled or varnished, they may require complete replacement.
- Transom Integrity: If the boat was used frequently with an outboard motor, the transom may show signs of compression or core rot. Check for flexing when weight is applied to the motor mount area.
Community & Resources
While there is no longer a dedicated factory support system for the Blue Crab 11, the boat is frequently discussed within the broader community of Lockley Newport and Gloucester Yachts owners. Technical specifications and rigging diagrams are often shared through the Gloucester & Newport Boat Owners groups found on various sailing forums. Additionally, because the boat uses standard small-boat hardware, many replacement parts can be sourced through general marine chandleries rather than specialized manufacturers.
The Verdict
The Blue Crab 11 remains a highly regarded choice for sailors seeking a rugged, multi-purpose dinghy that prioritizes stability over speed. Its ability to transition from a sailing trainer to a rowing utility boat makes it a versatile addition to any waterfront.
Pros
- Stability: A wide beam and full hull shape make it very difficult to capsize under normal conditions.
- Simplicity: The cat rig and basic hardware are easy to maintain and quick to rig at the boat ramp.
- Versatility: Functions equally well as a sailboat, rowboat, or small powerboat.
Cons
- Weight: At roughly 140–160 pounds, it is heavier than modern rotomolded plastic dinghies of the same size.
- Performance: It is a slow sailor compared to contemporary one-design racing dinghies like the Laser or Sunfish.
- Aging Hardware: Many used models will require upgrades to the original blocks and lines to ensure smooth operation.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Daggerboard
- Rudder
- 1x —
- Ballast
- -
- Displacement
- 200 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 11.08 ft
- Waterline Length (LWL)
- 10.25 ft
- Beam
- 5.17 ft
- Draft
- 2.75 ft
- Max Headroom
- -
- Air Draft
- 19.67 ft
Rig & Sails
- Rig Type
- Fractional Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 88 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 41.17
- Ballast / Displacement Ratio
- —
- Displacement / Length Ratio (D/L) Ratio
- 82.91
- Comfort Ratio
- 3.3
- Capsize Screening Formula
- 3.54
- Hull Speed
- 4.29 kn