Product Details

Design Details

Cygnus GM21

The boats that we produced were all bespoke, crafted to customer specifications so you may find many variations on this core product out there that are unique in their own way.


Cygnus GM21

The small print

Boat Descritption


Cygnus GM21

Cygnus Marine, Britain’s leading GRP fishing and workboat builders, first introduced this design in 1977, and since that date the CYGNUS GM21 has become the accepted standard for inshore fishing vessels, with over 300 craft being constructed. She is a sea-friendly, round bilge, stable, easily driven hull with a range of layouts to suit most applications and the capability of a sealed self draining deck. The craft is available to any stage of construction from bare hull shell to a fully finished to owners specification.

Boat Pictures

Product Gallery

GM21 Lines Plan and Specification


Some Diagrams are not to scale. All craft are custom built and may not match diagram above

Metric 5.85m Imperial 19'-2''
Metric 0.53m Imperial 1'-9''
Metric 2.3m Imperial 7'-6''
Metric 1.25 ton
Engine Power
Metric 8-14kw Imperial 12-18 hp
Gear Reduction
Metric 2:1
Propeller Diameter
Metric 300 - 400mm Imperial 12'' - 16''
Metric 13kph Imperial 7knots

Dimensions in FT and Inches

get in touch


This Cygnus boat is available fromĀ 

Mr Peter Meredith
Blackbird Cottage. (Office.)
High Street


The Cygnus GM21 is a sturdy inshore fishing vessel and work boat, suitable of single handed working and all year round use.

The design features include a high upright stern with a fine waterline entry, full round low bilges, full displacement long keel and transom stern. This combination produces a stable and seaworthy hull of exceptional quality. Working off a beach is easily done.

This vessel has become the accepted standard for many in shore fishing boats, with 30 years of production it is a very sea friendly vessel. A moulded cuddy can be built from maintenance free GRP or more traditional hardwood.

Recently Submitted boats

Cygnus spotted

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CY15 spotted in Bournemouth harbour
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CY15 submitted by Jim from Hartlepool. Originally called Aurora the boat is now a punt for a larger sailing craft
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Oyster fisher from Hamble
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Training gig for Flushing rowing club
Cygnus in action

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