I replied you privately and I am also posting
here in case the information would be useful to others.
there is currently a requirement for any boat
with an engine
to carry 3rd party liability insurance
- euro 5 million for personal injuries
- euro 1 million for damages to properties
The requirement of having liability insurance
is strictly enforced on ITALIAN boats by the coast guard or other government
enforcement agencies (polizia, guardia di finanza, etc.).
We are required to carry the insurance both for the boat and the dinghy
(if it has an engine). However, the cost of this insurance in Italy
is quite low and parametrized to the engine
For example, for a sailboat with a 60HP engine
I pay about 100 euro a year for 7 million euro liability (well over the law minimum requirement). For the dinghy
about 40 euro.
However, I have never heard of a foreign pleasure boat being asked by Italian authorities for specific liability insurance amounts.
If you want to do online shopping
for a liability insurance from an Italian company, you can try googling "assicurazione R.C. natanti"