Blyth Bridges Marine Consultants Limited

Fast Monohulls

20 metre

Fast round bilge monohull “Herston Lass” built for Elf Petroleum.
The vessel is designed to carry 100 passengers at 20 knots to MCA Class IV, V & VI requirements. The hull is built in steel with an aluminium superstructure. With more powerful engines the design is capable of speeds up to 25 knots.
The hull is designed to provide excellent sea-keeping in adverse conditions and has been operating in the Orkney Islands for the last 10 years.

Length overall        21 m
Beam                    6.35 m
Draft                     2.0 m
Displacement        70 tonnes
Installed power     2 x 700 kW
Speed                  21 knots

34 metre

A 34 metre patrol boat version of the hull is available giving speeds up to 35 knots.

The vessel is designed for extended patrol in adverse conditions. The hull is designed for steel construction and is fitted with an aluminium superstructure. If required a steel superstructure could be fitted.

The hull is suitable for various roles including police, customs, coastguard, para-military and military operations.


Designs in association with David Jenkins Naval Architect