Sète, Hérault, France

Engineering studies of a typical LNG Ro-pax ship in Italy


The Italian Ministry of Transport promoted the development of basic and detailed studies for three typical Mediterranean ships: one large passenger ship, one medium Ro-pax ship and one small Ro-pax ship.

The engineering studies of the medium Ro-pax ship concerned the analysis of the possible LNG retrofit of a typical Ro-pax ferry class of GNV shipping company.

The engineering studies focused on the technical and economic assessment of the LNG retrofit feasibility, compared to other possible options for sulphur emissions compliance (e.g. scrubbers), based on the technical specification of the ship (such as possible LNG storage dimensions and locations, stability calculations, etc.) and on the average fuel consumption. Investigations included also those new aspects that have to be adapted, improved and fine-tuned according to the use of LNG as fuel (such as skills and training needs, maintenance, control and monitoring systems, IT platforms & computerized management systems etc.).

A typical risk analysis of the medium Ro-pax ship bunkering operations in GAINN4MOS ports has been carried out, including appraisals on SIMOPS issues (simultaneous bunkering and passenger handling operations).

On the regulatory side, all the necessary studies, interpretation, guidelines and tools as needed for IMO’s IGF Code application have been assessed.

Basic engineering studies also focused on the analysis of the proper LNG bunkering system for typical medium Ro-pax ships in the Mediterranean. In the start-up period, until appropriate LNG fixed refuelling infrastructures are widely spread and considering the needed amount of LNG, the typical transfer system, performed via mobile LNG infrastructure, might consist either of ship-to-ship operations via LNG bunkering barges/ships (that could act both as floating storages and as ship-to-ship transfer systems) or truck-to-ship operations via multiple LNG tank truck/ISO containers simultaneously connected to the ship main frame common manifold.

With the purpose of sharing the main studies results and feedbacks and to foster the LNG uptake in the Mediterranean trough the dissemination of the lessons learned from the GAINN4MOS experience, an executive summary report and dissemination material will be available in this section of the website soon.