HamiltonJet have been selected as the propulsion partners in three recent catamarans, all working in the offshore industry. In each case the combination of wide operating envelope, enhanced manoeuvrability and proven durable design were contributing factors to the selection of the propulsion and control package.
The first of these vessels to be built was Windcat 21, constructed by A.F. Theriault & Son for the UK/Netherlands based
Windcat Workboats. Windcat have been supplying vessels for the offshore windfarm support market since the early 2000’s and this recent expansion of their fleet is their third generation of vessels. Windcat utilised HamiltonJet in their first generation of vessels and having trailed other forms of propulsion have again selected HamiltonJet for their most recent builds. Usable low speed thrust was a critical selection factor for these 18 metre vessels to ensure the vessels unique “step over system” can safely allow crews to transfer to the tower in all conditions and the twin HamiltonJet HM571 waterjets helped the vessel record over eight tonnes of bollard pull during trials. Sister ships are already in construction.
The second vessel, which was recently completed at Kockums of Sweden
for Fintry Marine, is the CarboCat 23. This 23 metre catamaran is the first offshore windfarm support vessel to utilise carbon fibre construction. Twin HamiltonJet HM571 waterjets propel the vessel to 31 knots top speed although service speed will be around 25 knots. Manoeuvrability is one of the key factors during the crucial docking procedures for these types of vessels and the compact and integrated HamiltonJet hydraulics solution provides the most rapid controls response available, making for enhanced vessel manoeuvrability even when compared to other waterjet vessels.
The third innovative vessel is a 28 metre catamaran currently in build in the UAE at Topaz Shipbuilding. The vessel, designed by Incat Crowther, will be the first in the offshore industry to utilise a wavepiercing hull form. The vessel will use twin HamiltonJet HM651 waterjets to reach speeds in excess of 30 knots and also has over 50 square metres of deck space for carrying cargo. High performance and also high durability in the harsh operating environment were key considerations for the propulsion system for this vessel and the HamiltonJet inboard hydraulics, stainless steel stator leading edges and unrivalled applications experience proved to be critical features for the propulsion selection in this case.