The vessel was designed from the beginning to be a flexible, multi-purpose by design, modular unit with a low environmental impact. It is a Landing Helicopter Dock (LHD) capable of deploying aircraft and amphibious vehicles and equipment, relying on a flight deck and a floodable basin located on the stern of the ship.

Fincantieri reported that the 'Trieste' will be classified by RINA Services pursuant to international conventions for the prevention of pollution regarding traditional aspects – like those addressed by the MARPOL Convention, as well as those not yet mandatory, like the ones covered by the Hong Kong Convention introducing the 'Green Passport' concept.

The unit will be delivered in 2022, along with the naval program of the maritime capability of Defence, approved by the Italian Government and Parliament and started in May 2015.

The ceremony was also attended, among others, by the Italian Minister of Economic Development, of Labour and Social Policies and Deputy Prime Minister of Italy Luigi Di Maio, Mrs. Laura Mattarella, daughter of the Italian President, and the Italian Minister of Defence Elisabetta Trenta, by the Governor of Campania Vincenzo De Luca, by the Chief of Defence Gen. Enzo Vecciarelli and the Chief of Staff of the Italian Navy Adm. Valter Girardelli.