The Dutch shipbuilding firm The Damen Group, designs and manufactures a wide variety of vessels, including a range of related patrol vessels known generally as the Damen Stan Patrol vessels.
The Damen Stan Patrol designs' names include a four-digit code, where the first two digits are the vessel's length, in metres, and the second two digits are its width. Over a dozen nations have classes of vessels based on the Damen Stan 4207 patrol vessel design, which are long and wide. The United States Coast Guard's Sentinel class cutters, based on the Damen Stan 4708 patrol vessel design, are long and wide.
In the late 1990s three 41 vessels were built for service in the Dutch Antilles, and experience with those vessels informed the later designs of the 4207 and 4708.
Rather than design vessels that were strictly for naval use, the underlying Damen Stan Patrol designs do not include weapons, or a sensor suite. The designs have been adapted for policing duties, and for fishery and environmental patrols. According to Sanjay Badri-Maharaj, of the -Institute for Defence Studies and Analyses, described how adding an autocannon and military class sensor suite to the USCG's Sentinel class increased its cost per vessel from $20 million USD to $65 million.
In recent years Damen has developed Damen Stan Patrol vessels based on their Sea Axe bow design. The Stan 4207 design are patrol vessels. They are wide, and can travel at . They are designed to carry a complement of approximately a dozen. The Stan Patrol 4708 is long, wide, has a maximum speed of , and carries a complement of 16âÂÂ24.
Vessels of this type have been supplied to, or ordered by a number of countries. As of December 2011 thirty five vessels had been built. Many of the agencies that employ these vessels have them delivered without armament, or solely with small arms. They are equipped with water cannon. Many of the agencies that employ these vessels specified they should be equipped with a stern launching ramp, capable of launching and retrieving a pursuit craft (RHIB) while underway. The vessels are equipped with a horizontal thruster in their bows, to aid maneuvering in tight conditions, such as mooring in crowded anchorages. The ships are well known for their sea handling capabilities and comfort. Many are powered by Caterpillar engines.
A 5009 vessel MY Ocean Warrior was also built for Sea Shepherd Conservation Society in 2015âÂÂ2016.