The Italian boarding sword was a tool used by sailors or pirates. When ships collided and one crew needed to get aboard another vessel, this sword was used to cut rope with ease or hack closed doors.
Although considered a tool, it was also used as a weapon. It could pierce a victim and the fighting style is very similar to fencing (except with a shorter blade.)
We are accustomed to seeing sailors and pirates with curved blades (cutlasses for example) but this particular sword has a straight blade.
It is also called a Genoese boarding sword because of a captain who hailed from the Republic of Genoa.