What nonlethal device can stop small vessels by entangling the propellers or engine intakes of vessel?

A nonlethal device designed to stop small vessels by entangling their propellers or engine intakes is known as a "net gun" or "entangling net." These devices deploy a large net that can ensnare the moving parts of a vessel, effectively immobilizing it without causing significant damage. They are often used in maritime security operations to intercept unauthorized boats while minimizing risks to the crew and vessel.