Breakwaters: Marine Engineering Reshapes Global Sea Freight

At the first light of dawn, in the stretch of sea overlooking the port of Genoa, the thirteenth caisson slowly glides down towards the seabed, 50 metres deep.

Sixty-seven metres long, thirty wide, thirty-three high: a cathedral of reinforced concrete that disappears into the blue in an operation lasting nearly an entire day. Six pumps work in synchrony to fill the caisson’s internal chambers with water, guiding its descent to the seabed.

It is the largest caisson ever built in Italy, created for the Genoa New Breakwater: a structure more than six kilometres long, made up of over 100 elements sunk side by side. Behind the spectacle of the sinking lies the precision of an industrial process: the caissons are constructed atop a semi-submersible barge, completed while floating, and then launched.

The result is the creation, piece by piece, of an invisible yet vital barrier that will protect the port of Genoa from storm surges, enable the entry of the world’s largest ships, and pave the way for more sustainable maritime logistics.