Police Boats Escorting Naval Parade - 1898 was released on:
USA: September 1898
Excursion Boats Naval Parade - 1898 was released on: USA: September 1898
Because the ship has value, and they are literally an escort; or other reasons.
On the River Thames.
the united states issued orders to shoot German u-boats on sight
Fluvial Parades are basically only in the Philippines and means nothing else than a boat parade along a river or seashore, usually with a patron statue/Jesus/Mary on some of the boats.
Boats - 1908 was released on: USA: April 1908
I tried the boats in TBOGT, including a police launch, but I haven't found an armed one yet. You can do a drive by on any of the boats though, using the SMG.
Boats - 2013 was released on: USA: 20 September 2013 (internet)
Albany Day Boats - 1897 was released on: USA: June 1897
Boats Under Oars - 1901 was released on: USA: May 1901
Fishing Boats on the Ocean - 1908 was released on: USA: August 1908
Harbor Master - Metropolitan Police