Light forces carried much of the Adriatic naval campaign

How much naval support did the Allied advance up Italy receive on the Adriatic side?

There was substantial activity, but it relied mainly on submarines, motor torpedo boats, and other light forces that harassed German and Italian coastal movement rather than a large heavy-fleet supply effort.

Allied naval activity on the Adriatic side of Italy was substantial and often involved submarines. British motor torpedo boats and other light forces also operated against German torpedo boats and supply movements. Securing access at the entrance allowed operations to push farther into the Adriatic. The emphasis was harassment of German and Italian supplies, with no need to accept the risks of a major Allied supply campaign there.