A patrol boat is a relatively small naval vessel generally designed for coastal defence, border security, or law enforcement. There are many designs for patrol boats, and they generally range in size. They may be operated by a nation's navy, coast guard, police, or customs, and may be intended for marine, estuarine, or river environments.
The Maldivian Coast Guard is the naval or maritime arm of the Maldives National Defence Force (MNDF). Because the Maldives does not have a navy, the MNDF Coast Guard functions as the armed maritime force of the nation with a charter to contribute to national defence and by and large to respond to issues related to the maritime security of the nation. Therefore, the Coast Guard is documented as the custodian of the Maldives Maritime Domain. Maritime security is a constituent ingredient of the national security in a maritime nation such as the Maldives and its significance is best understood when one perceives the island or the archipelagic nature of the country.
The Khulna Shipyard Limited(Bengali: খুলনা শিপইয়ার্ড লিমিটেড) is a Bangladeshi state owned defense contractor based in Khulna, Bangladesh. It is located on 68.97 acres (27.91 ha) of land at Labanchara, Khulna, Bangladesh. It is about 45 km north from the Port of Mongla. The shipyard has the capacity to build steel / aluminium ships up to 90 m length and 700 tons lightweight. The shipyard has a slipway with a capacity to dock and undock vessels up to 700 tons lightweight and overall length of 84 meters.
The Pabna class is the class of a riverine patrol crafts in service in Bangladesh. The ships of this class are the first ever made in Bangladesh warships. They are operated by the Bangladesh Coast Guard.
CGS Pabna is a Pabna-class riverine patrol craft of Bangladesh Coast Guard. She is the first ever warship made in Bangladesh.
CGS Bogra is a Pabna-class riverine patrol craft of the Bangladesh Coast Guard.
CGS Rangamati is a Pabna-class riverine patrol craft of the Bangladesh Coast Guard.
CGS Patuakhali is a Pabna-class riverine patrol craft of the Bangladesh Coast Guard.
CGS Sobuj Bangla is the lead vessel of the Sobuj Bangla-class inshore patrol vessels of the Bangladesh Coast Guard. She is serving the Bangladesh Coast Guard since 2020.
The Sobuj Bangla class is a class of inshore patrol vessel (IPV) family of the Bangladesh Coast Guard built in three batches. This class is a subclass of the Padma-class patrol vessel with similar design but less displacement and different armaments.
CGS Mansoor Ali is a Leader Class offshore patrol vessel of the Bangladesh Coast Guard. She is serving the Bangladesh Coast Guard since 2020.
Dockyard and Engineering Works (DEW) Limited is a ship construction and repair yard at the Narayanganj, Bangladesh owned by the Government of Bangladesh under Ministry of Defence and managed by the Bangladesh Navy. The yard built many small to medium-sized patrol boats for the Bangladesh Coast Guard and landing craft for the Bangladesh Navy.
CGS Sonar Bangla is a Sobuj Bangla-class inshore patrol vessel of the Bangladesh Coast Guard. She has been serving the Bangladesh Coast Guard since 2020.
CGS Aparajeya Bangla is a Sobuj Bangla-class inshore patrol vessel of the Bangladesh Coast Guard. She is serving the Bangladesh Coast Guard since 2020.
CGS Shadhin Bangla is a Sobuj Bangla-class inshore patrol vessel of the Bangladesh Coast Guard. She is serving the Bangladesh Coast Guard since 2020.
CGS Shamol Bangla is a Sobuj Bangla-class inshore patrol vessels of the Bangladesh Coast Guard. She is serving the Bangladesh Coast Guard since 2020.
CGS Kutubdia is the lead vessel of the Kutubdia-class fast patrol boat of the Bangladesh Coast Guard. She is serving the Bangladesh Coast Guard since 2020.
CGS Sonadiaa is a Kutubdia-class fast patrol boat of the Bangladesh Coast Guard. She is serving the Bangladesh Coast Guard since 2020.
CGS Joy Bangla is a Sobuj Bangla-class inshore patrol vessel of the Bangladesh Coast Guard. The ship is undergoing sea trials.
Bangladesh Coast Guard 
Bangladesh Navy