BTW nobody is answering my question about when and where 31 galleys were transported...
Venetians transporting their galleys to the Lake Garda during war against Milan in 1439.
YES!
Venetians transported 31 galleys on Adige river, then by road till a small lake, pulled up throug a riverfall, and again by road down to Torbole...
In order to "brake" the galleys were not enough oxen and so were used emergency sail against the Ora wind...
As I said at the beginning I wrote a paper for the Italian Navy magazine discussing about "transportations" of ships on earth and illustrated with a series of FD drawings