There is no such thing per se: as "marine police" just as there is no such thing as snowmobile police nor atv police. There are however OPP officers who are trained to operate these various vehicles,, so for example, on a fishing derby weekend, the Quinte area needs to continue to be policed in all its various forms; highway, traffic, towns, townships, etc so when special events such as the derby arise, it costs a shit load of extra tax payer dollars to pay additional officers overtime to do the additional policing, much like any other special event requiring policing such as ice fishing derby requires additional snowmobile cops, atv events requires additional overtime for atv cops..yes...the tax payers do pay exrtra and the cops get to bob around on the lakes all weekend, picking up irresponsible yahoos boozing it up