Two 8-cylinder ABC 8MDZC (4-stroke) diesels, running at 1,000rpm, will generate a total of 5,027bhp (3,700kW) to power for two fixed pitch Schottel SRP1515 propulsion units. This arrangement will give the vessels an anticipated bollard pull of 60 tons and a maximum free running speed of 12 knots. Two Scania D9 95M 10-40 diesel generators, rated at 196kW each, will supply electrical power aboard each tug.

A Brusselles SLH150.20/2-2-2 double-drum towing winch, with a brake holding capacity of 1,800kN will be located on the foredeck. One drum, used principally for shiphandling over the bow, will carry a Dyneema man made fibre towline and the other a steel wire towline of 52mm in diameter for harbour work or towing at sea.

When towing over the stern the steel wire towline will be routed through a tunnel beneath the accommodation and through a fairlead on the afterdeck.

The winch will be capable of remote operation from a panel in the wheelhouse or by means of a portable joystick controller.

Extensive fendering surrounding the entire vessel will protect the hull, particularly during shiphandling operations in the 'push-pull' mode.

Navigational and communication equipment meet current technical standard in relation to such systems as GMDSS, gyrocompass, autopilot, electronic charting, AIS and the two radars.

Accommodation aboard each vessel will include sleeping facilities for six persons but the tugs will normally operate in port with a crew of three.