The inlet duct is fabricated from aluminium sheet to an optimised hydrodynamic profile and the mounting flanges are supplied in two versions, one for welding direct into an aluminium hull and the other for bolting into hulls made of other materials.

Reverse and steering hydraulic cylinders are mounted inboard, and close attention has been paid to reducing risk to the environment. The actuating cylinders are anchored to a flange part way along the inlet duct nest to the thrust bearing. This flange is designed so that it can be welded to, allowing the jet unit to be incorporated as part of an aft collision bulkhead structure.

The FF600can be supplied either as a steerable and reversible unit or as a pure booster without the steering and reversing components. A Rolls-Royce interceptor system can be integrated with this waterjet, mounted below the impeller chamber and linked to the Rolls-Royce electronic control system. Combining all these elements provides powerful thrust, joystick control of manoeuvring and independent control of vessel roll, trim and attitude in a turn.

With the introduction of the Kamewa FF600, the range now extends from 260kW to 1,800kW per jet in 13 frame sizes, meeting requirements for workboats and smaller military craft. The smaller units in the range are more standardised, but with the larger waterjets such as the FF600 there is a greater degree of flexibility, allowing customers’ specific requirements to be met.