Both vessels are virtually identical, with an overall length of 30.5m, breadth of 10.6m and maximum draft of 5.13m. The substantial hull has a raised forecastle and is well protected by mix of rubber fendering of various type and sections all round the vessel. Internal tanks are provided for 195 cu/m of fuel oil, 77m 3of fresh water, 24m 3of ballast, 16 cu/m of foam agent and 9 cu/m of chemical detergent. Two Schottel azimuthing propulsion units, fitted with controllable pitch propellers, are driven by Caterpillar 3606 DITA main engines developing a total of 5516bhp (4060kW) at 1000rev/min. Each main engine is also coupled to one fire fighting pump and one hydraulic pump to power the deck machinery.

During trials a bollard pull of 64 tonnes ahead and 59 astern was recorded, with the main engines at 100% MCR. The tugs have a maximum speed of 13.67 knots.

For shiphandling the tugs are equipped with two Rolls-Royce combined towing winches and anchor windlasses installed on the forecastle. Each one is hydraulically driven and comprises one de-clutchable cable lifter, one warping head and one winch drum. Both towing winch drums have a brake load of 150 tonnes and accommodate150m of nylon rope 80 mm in diameter. For towing at sea the tugs are fitted with a Rolls-Royce single drum-towing winch aft. This winch also has a 150 tonne brake-holding load and the drum has capacity for 600m of steel wire towline of 52mm diameter.

The winch has an automatic spooling system and an emergency de-clutching device.

All three winches can be controlled locally or by remote control from the bridge. A heavily reinforced double bitt is fitted with guide for the aft towing winch cable and a stern roller is installed at the after end of the towing deck.

A Cytecma electro-hydraulic, telescopic and articulated crane is provided on the boat deck, capable of lifting approx 1.3 tonnes at 7.8m. The hydraulic supply system is by means of a self-contained power-pack. Fire fighting equipment to FiFi 1 standard includes one monitor delivering water and one with a combined water/foam output.

A self protection spray system is included.

Accommodation onboard includes two single cabins, two double cabins, a galley, mess room and the usual washing and toilet facilites. The high wheelhouse is typical of many Cintranaval designs affording good visibility and is accessible internally and externally.