The RAmparts 2100-CL was lead by a two vessel order for New Zealand delivered in 2022 after two RAmparts 2500-CL delivered in 2015. While shorter overall length was advantageous for safe manning regulations, this compact and versatile new RAmparts 2100-CL model packs with impressive power, and is designed for operation by 2 crew. Construction is to Lloyds Register, with the notation +100A1 Tug, +LMC, UMS, *IWS, Unlimited Service, with Fi-Fi options available.
With standard propulsion, Cheoy Lee offers bollard pulls of 50 tonnes, and maximum speed of 12 knots.

The RAmparts 2400W is a variation of Robert Allan's standard RAmparts 2400 with a wider beam. It is a powerful yet agile compact tug with all round visibility, equipped with an aft-biased deckhouse and wheelhouse, larger forward deck and relatively low draft to cater port operations.

A range of engine options, including Niigata and Caterpillar offer impressive power. The tugs offer excellent maneuverability, free running speed of 12-13 knots and bollard pull figures of 65 to over 70 tonnes depending on engine selection. A complement of normal 6 (MLC) to maximum 10 crew members can be carried, with accommodation on the main and lower decks.

The RAmparts 2500-CL represents an evolution from a two vessel order for New Zealand delivered in 2015, where shorter overall length was advantageous for safe manning regulations. This compact new RAmparts 2500-CL model packs impressive power and versatility, and is designed for operation by a small crew, although still with MLC2006 compliant accommodation for 8 crew. Construction is to Lloyds Register, with the notation +100A1 Tug, +LMC, UMS, *IWS, Restricted Service, with fifi options available.

With standard propulsion, Cheoy Lee offers bollard pulls of 50 and 60 tonnes, but optional power packages are available for over 70 tonnes.

The RAmparts 3000-CL can accommodate eight crew. Deck machinery can be selected to meet operators needs. Construction is to Lloyds Register classification, with the notation + 100A1 Tug, +LMC.

Propulsion is by twin Caterpillar or Niigata engines driving Rolls Royce, Schottel or Niigata Z-drive propulsion units.

The RAmparts 3200-CL is a variation of Robert Allan's Ramparts 3200 designed specifically for Cheoy Lee. A range of engine options, including Niigata and Caterpillar offer power ranging from 2250hp to 3151hp per engine. The tugs offer excellent maneuverability, a top speed of 12.5 to 13 knots and bollard pull figures of 65 to over 75 tonnes depending on engine selection. A complement of 12 crew members can be carried, with accommodation on the main and lower decks.

Deck gear can be prescribed by the client, to include towing winches, hooks and bitts, as required. A fixed arm davit for handling a SOLAS approved rescue boat.

A 2850m³/h FFS fire pump can be driven off the main engine, to supply two 1200 m³/h fire monitors, satisfying the Fi-Fi 1 class notation.

RAmparts 3200-CL tugs are classed under Lloyds Register with the notation, +100A1, Tug, Fire-Fighting Ship 1 with Water Spray *IWS, +LMC, UMS.