Mosquito Cat Information, Review, Specs

Sailing Performance & Handling

The Mosquito is renowned for its "lively" and sensitive handling characteristics, largely due to its exceptionally low displacement. With bare hulls weighing as little as 55 kg and a fully rigged weight under 100 kg, the boat responds instantly to wind shifts and crew movement. It is typically sailed in two primary configurations: the Mark I, which is a single-handed cat rig (mainsail only) utilizing one trapeze, and the Mark II, a two-person sloop rig (mainsail and jib) featuring dual trapezes.

According to technical data from the National Mosquito Catamaran Council, the hulls are relatively narrow with a beam of 2.185 meters, making the boat more prone to "flying a hull" than wider, more stable cats like the Hobie 16. However, this narrower beam contributes to superior tacking ability and a reduced tendency to hobby-horse in chop. While earlier critics viewed its high-aspect rig as demanding, modern sailors appreciate the control afforded by its flexible mast and adjustable downhaul systems. The addition of a spinnaker kit in 2001—often referred to as the "Spinnaker rig" variant—has further extended the boat's performance envelope, providing significant acceleration on off-wind legs.

Popular Mentions & Media

The Mosquito holds a prestigious place in Australian sailing history, having served as a developmental platform for many of the country's top multihull sailors. Its designer, Neil Fowler, created the boat during a fertile period of Australian nautical innovation that also saw the rise of designers like Ben Lexcen (Bob Miller). The class's longevity is evidenced by the "Mozzie with Sting" promotional descriptions historically used to market its racing pedigree. It is a staple of the Australian Sailing championships, frequently participating in national regattas that showcase its enduring speed against newer classes like the Taipan or F16.

Known Issues & Buyer’s Checklist

Prospective buyers should evaluate the boat based on its construction material, as the Mosquito was built in both timber (plywood) and fiberglass (GRP) formats.

• Plywood Hull Integrity: Many older Mosquitos were built using "stitch and glue" plywood construction. Buyers should inspect the internal frames and pickup points for the crossbeams (the "beams") for signs of soft wood or rot, particularly if the boat has been stored outdoors.
• Beam-to-Hull Connections: The structural integrity of the main and rear beams is critical. Check for hairline fractures in the fiberglass or fatigue in the timber where the beams mount to the hulls. Any movement or "play" in these joints can severely compromise the rig tension and safety.
• Rudder and Centerboard Condition: The class uses pivoting centerboards rather than fixed keels. Ensure the centerboard cases are clear of obstructions and that the foil-shaped blades are not warped or delaminated.
• Rigging and Mast Fatigue: Given the boat's age, the aluminum masts should be checked for corrosion at the base and around the hound fittings. The Mosquito uses a highly tunable, flexible rig; a permanent set (bend) in the mast can hinder performance in varied wind conditions.

Community & Resources

The class is supported by a robust network of state associations, coordinated by the National Mosquito Catamaran Council (NMCCA) in Australia. This organization maintains the official building rules and provides technical support for home builders. Detailed construction plans and measurement templates are still made available through the National Mosquito Catamaran Council, ensuring the class remains one of the few high-performance catamarans that can still be built and maintained by a dedicated amateur.

The Verdict

The Mosquito Cat is a purist’s multihull that rewards technical skill and finesse over brute strength.

Pros:

• Exceptional power-to-weight ratio provides a fast, responsive sailing experience.
• Versatile rig configurations allow for both single-handed and double-handed racing.
• Extremely lightweight, making it easy to handle on the beach and trailer.
• Affordable entry point into high-performance catamaran sailing compared to modern carbon-fiber classes.

Cons:

• Demanding to sail in high winds due to its narrow beam and low displacement.
• Older plywood models require significant maintenance to prevent rot.
• Niche community outside of its primary strongholds in Australia.