The Harbor patrol is an extension of a city or municipal police department, sometimes referred to as water police. Their job is to patrol and safeguard waterways leading into their jurisdiction including rivers, tributaries, inlets, bays and harbors.
In the 1979 film Zombie 2 by Lucio Fulci, two members of the harbor patrol came upon a sailing vessel drifting into Staten Island. Upon investigating the boat, one officer discovered the remains of a severed hand as well as a bloated, worm-infested zombie. The zombie attacked the harbor patrol guard, biting him on the neck before going topside. A second harbor patrol officer shot the zombie several times until it fell off the side of the boat into the water.