A patrol boat is a relatively small naval vessel generally designed for coastal defence, border protection, immigration law-enforcement, search and rescue duties. There have been many designs for patrol boats. They may be operated by a nation's navy, coast guard, police force or customs and may be intended for marine or estuarine or river environments. They are commonly found engaged in various border protection roles, including anti-smuggling, anti-piracy, fisheries patrols, and immigration law enforcement. They are also often called upon to participate in rescue operations.
The River class is a class of offshore patrol vessels built primarily for the Royal Navy of the United Kingdom. A total of nine were built for the Royal Navy (RN), four Batch 1 and five Batch 2. One Batch 1 (HMS Clyde), which was the Falklands guard ship, was decommissioned and transferred at the end of its lease to the Royal Bahrain Naval Force.
The Floréal class is a type of light "surveillance frigates" designed for the needs of the French Navy in low-threat environments ordered in 1989. The ships are named after months of the Republican Calendar. They use construction standards of commercial ships. The frigates were built between 1990 and 1993 by the Chantiers de l'Atlantique at Saint-Nazaire, France. The six French ships of the class, Floréal, Prairial, Nivôse, Ventôse, Vendémiaire and Germinal, remain in active service.
The OTO Melara 76 mm gun is a naval gun built and designed by the Italian defence company Oto Melara. It is based on the Oto Melara 76/62C and evolved toward 76/62 SR and 76/62 Strales.
The Protector-class offshore patrol vessel is a ship class of two offshore patrol vessel (OPVs) operated by the Royal New Zealand Navy (RNZN) since 2010. The ships are named HMNZS Otago and HMNZS Wellington.
The Kedah-class offshore patrol vessels of the Royal Malaysian Navy (RMN) are six ships based on the MEKO 100 design by Blohm + Voss. Originally, a total of 27 ships were planned, but due to programme delays and overruns, only six were eventually ordered. Their construction began in the early 2000s, and by 2009, all six were in active service. The six vessels are named after Malaysian states.
The Yoon Youngha-class patrol vessel also known as PKG-class patrol vessel is a class of patrol ship of the Republic of Korea Navy. One variant is in active service and a smaller variant is planned. The first being the PKX-A or Yun Youngha-class missile patrol ship, and the second the PKX-B class patrol boat.
The Viana do Castelo class is a class of offshore patrol vessels planned by and for the Portuguese Navy, as a result of the NPO2000 Project, that are being constructed in the West Sea Shipyard.
The Holland-class ocean-going patrol vessels are a class of four ocean-going patrol vessels constructed for the Royal Netherlands Navy. They are designed to fulfill patrol and intervention tasks against lightly armed opponents, such as pirates and smugglers, but have much higher level electronic and radar surveillance capabilities which are used for military stabilization and security roles, short of outright war. Without sonar or long range weapons, they utilize the surveillance capabilities of the Thales integrated mast, which integrates communication systems and two 4-faced phased arrays for air and surface search.
The Gowind design is a family of steel monohull frigates, corvettes and offshore patrol vessels developed since 2006 by France's Naval Group, formerly known as DCNS, to conduct missions in the littoral zone such as anti-submarine warfare (ASW). The Gowind family includes vessels with lengths from 85 to 111 metres and displacement from 1,000 tons to 3,100 tons.
The Warrior-class strike craft in service with the South African Navy are modified Sa'ar 4 (Reshef)-class fast attack craft. The class was initially known as the Minister class as all the boats were named after South African Ministers of Defence. The strike craft flotilla was known as SAS Scorpion.
BNS Shaheed Ruhul Amin was an Island-class offshore patrol vessel of the Bangladesh Navy used as a training ship. She was built and served as a Royal Navy Island-class patrol vessel HMS Jersey (P295) from 1977 to 1993.
The Arafura class is a class of offshore patrol vessels being built for the Royal Australian Navy (RAN). Initially proposed in the 2009 Defence White Paper and marked as procurement project SEA 1180, it was originally planned that 20 Offshore Combatant Vessels (OCV) would replace 26 vessels across four separate ship classes: the Armidale-class patrol boats, the Huon-class minehunters, the Leeuwin-class survey vessels, and the Paluma-class survey motor launches. Although having a common design, the ships would use a modular mission payload system to fulfill specific roles; primarily border patrol, mine warfare, and hydrographic survey. The 2013 Defence White Paper committed to the OCV project as a long-term goal, but opted in the short term for an accelerated procurement of an existing design to replace the Armidales, and life-extension refits for the other types. This resulted in the Offshore Patrol Vessel (OPV) project and the amount of vessels reduced to 12. However, this was further increased to 14 when 2 further Mine Counter Measures variants were proposed under SEA 1905.
HTMS Krabi (OPV-551) is an offshore patrol vessel (OPV) of the Royal Thai Navy. She is a modified River-class patrol vessel, and was built by Mahidol Adulyadej Naval Dockyard, with design and technology transfer support from BAE Systems Surface Ships. Additional construction took place at the Royal Thai Navy Mahidol Dockyard in Sattahip.
The Samuel Beckett-class offshore patrol vessel is a class of offshore patrol vessels (OPV) ordered by the Irish Naval Service from October 2010. The first vessel is named Samuel Beckett and was commissioned in May 2014. Construction on this first vessel commenced in November 2011, A further three vessels were named James Joyce, William Butler Yeats and George Bernard Shaw, and delivered in 2015, 2016 and 2018 respectively.
OPV-64 is a type of Offshore Patrol Vessel based on a Leroux & Lotz patrol vessel concept and designed for the needs of the Royal Moroccan Navy, ordered in late 1993.
The Kership class is a range of steel monohull offshore patrol vessels (OPVs) built by Kership, a joint venture of French civil shipbuilder Piriou (55%) and Naval shipbuilder DCNS (45%).
The Tun Fatimah class is an offshore patrol vessel (OPV) built by the Malaysian company THHE-Destini with the assistance of Damen company from the Netherlands based on the design of the Damen 1800-class OPV vessel. THHE-Destini is a joint venture between two local company which is THHE and the Bagan Datuk-class patrol vessel builder, Destini Berhad. The class is also known as the Damen 1800-class offshore patrol vessel and the class changed names after the first ship of the class, KM Tun Fatimah. A total of three ships of this class are planned to be built.
HMS Spey is a Batch 2 River-class offshore patrol vessel of the Royal Navy. Named after the River Spey in Scotland, she is the eighth Royal Navy ship to be named Spey and is the fifth Batch 2 River-class vessel to commission and is forward deployed long-term to the Indo-Pacific region with her sister ship HMS Tamar.
The SMASH is a type of remote controlled weapon station manufactured by Aselsan of Turkey. The system is fitted with 30mm Mk44 Bushmaster II auto-cannon.
Royal Moroccan Navy 
