Yes it must be lost in translation somehow, in Italian also "cassone" is both the "diving bell" thingy and the "sinking box". The Mose in Venice (though it is

Yes it must be lost in translation somehow, in Italian also "cassone" is both the "diving bell" thingy and the "sinking box". The Mose in Venice (though it is a sort of foldable dam) has inside a tunnel for maintenance and it was built in a similar way: https://www.mosevenezia.eu/cassoni/ https://www.mosevenezia.eu/cassoni/