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A brown-water navy or riverine navy, in the broadest sense, is a navy capable of military operations in inland waters (, and ) and littoral.FIREPOWER: THE WEAPONS THE PROFESSIONALS USE - AND HOW. RIVERINE WARRIORS, #11 Orbis Publishing 1990 The term originated in the United States Navy during the American Civil War, when it referred to Union forces patrolling the muddy Mississippi River, and has since been used to describe the small and commonly used in rivers, along with the larger "mother ships" that supported them.
Brown-water navies are typically only used for patrolling and enforcing internal waters, in contrast to blue-water navy, which can independently conduct operations in the and power projection far offshore. Green-water navy, which operate mainly in brackish estuary, and neritic zone not too far off (typically within the bounds of exclusive economic zones), fill the operational gap between brown-water and blue-water navies.
The city of Tampico was poorly defended and offered a base for operations for the conquest of the state of Tamaulipas. For these reasons Tampico became the next target for seizure by American naval forces. Commodore David Conner directed that it be attacked in late October 1846 and those plans were captured by General Antonio López de Santa Anna. Santa Anna directed that Tampico be almost abandoned and his forces be moved up river to Pánuco. This move was completed by 28 October. The bar at the mouth of the Pánuco River was only eight feet and hindered the movement of American ships up the river. The wife of the former American consul at Tampico sent word to Conner that the river was rising and that the town had been abandoned. Conner's forces crossed the bar on 14 November and began shelling the town. Almost immediately the remaining garrison at Tampico surrendered and Conner learned that the troops stationed there had retreated to Pánuco 25 miles upstream from Tampico. After Conner's ships moved to Pánuco and several days of naval bombardment, the Mexican forces at Pánuco surrendered. The American Army quickly occupied Tampico and used it for a staging point for a planned attack on Veracruz.
The natural water highway to the Republic of Paraguay was the River Paraguay but this route was blocked by the formidable Fortress of Humaitá. It comprised a line of artillery batteries overlooking a sharp concave bend in the river, at a point where the channel was only wide. A chain boom could be raised to block the navigation. The fortress was exceedingly hard to take from the landward side for it was protected by impassible swamp, marsh or lagoons and, where not, by of trenches with a garrison of 18,000 men. The river was shallow, uncharted and capable of trapping large vessels if the water level should fall. In that environment the greatest threat to shipping was "torpedoes" (nineteenth-century floating naval mines).
Six vessels of the Brazilian ironclad squadron eventually succeeded in dashing past Humaitá in an incident known as the Passage of Humaitá, an event considered as nearly impossible. Although it could not operate far beyond its military forward base, nevertheless, Brazilian domination of the river meant that Paraguay could no longer resupply the fortress, and eventually it was starved out and captured by the land forces in the Siege of Humaitá.
Even after Humaitá was captured − which took more than two years – the Paraguayans improvised further strongpoints along the river, further delaying the Allies (the Empire of Brazil, the Argentine Republic and the Republic of Uruguay).
Ten Dinassauts were created, with five based in Cochinchina and the others in Tonkin. Each one was made of about ten vessels and one Commandos Marine unit. The types of vessels operated by a Dinassaut included LCI, LCT, LCM, LCVP, LCS, LCA, LSSL and fire support vessels.
The role of the Dinassaut was to transport, land and support the infantry, to patrol the watercourses and to assure the supply of the isolated posts.
The sailors that served in the Dinassaut were referred as the "Navy in Khaki", in comparison with the sailors that served in the ocean that were referred as the "Navy in White".In Dictionnaire de la Guerre d'Indochine, pages 83, 147-48In revue Bataille, HS n°7, page 70.
During the Portuguese Colonial War, from 1961 to 1974, the Portuguese Navy created a brown-water navy to operate in the rivers and lakes of Angola, Portuguese Guinea and Mozambique, against the separatist, communist guerrillas, as well as river pirates. For the organization of their riverine forces, the Portuguese were inspired by the French experience in Indochina with the Dinassaut and by their own historical experience in the operation of river flotillas in support of the Portuguese colonial pacification campaigns in Africa during the late 19th and early 20th centuries.
Under the local commands of the Navy, the Portuguese created river boat flotillas ( esquadrilhas de lanchas) in the Congo River in Angola, in the Lake Nyasa in Mozambique and in the river system of the Portuguese Guinea. Smaller riverine forces were also created in the Cabinda Province of Angola, in Eastern Angola (to operate in the Cuito, Zambezi, Cuando River, Lungué Bungo and Cuanza River rivers) and in Tete Province to operate in the Mozambican section of the Zambezi river. These forces were responsible for reconnaissance, surveillance, the interdiction of the rivers and lakes to the enemy, and to avoid their use for the infiltration and supply of guerrillas in the interior of Portuguese territory. Additionally, the riverine forces were also tasked with the mobile fire support to the land forces, the movement of troops, the supply of the Portuguese garrisons and the support of the civilian population in the riverine areas.
For these riverine forces, the Portuguese Navy conceived five types of vessels: the LFG (large river patrol boats of 200–300 tonne), the LFP (small river patrol boats of 18–40 t), the LDG (large landing craft of 480–550 t), the LDM (medium landing craft of 50 t) and the LDP (small landing craft of 12 t). The LFGs were armed with 40 mm guns and the LDPs with 20 mm guns, with several units of both types being also armed with . The LDG, LDM and LDP types were based, respectively, in the LCT, LCM and LCVP/LCA designs, but were modified in order to have a greater mission endurance and to be used for patrolling, fire support and as a mobile base for the Marines. This modifications included the protection of sensitive parts with armor, the installation of 40 mm (LDGs) or 20 mm (LDMs and LDPs) guns and the improvement of the crew accommodations, partially at the expense of the cargo deck.
The river boat flotillas were complemented by assault units of Special Marines ( fuzileiros especiais) and security units of Marines ( fuzileiros). The Portuguese Marines operated based in the patrol boats and landing craft and also using their own rubber boats.
For coastal duty the South Vietnamese Navy used larger seaworthy craft. These were replaced by newer U.S. Navy Swift Boats (PCF—Patrol Craft Fast, aluminum 50 footers) and United States Coast Guard Point-class cutters. By the late 1960s, the Swift Boat would commence operations alongside the PBRs in the inland waters, as well as maintaining operations along the coastline. Navy and Coast Guard ships assumed coastal duties. The Swift boats were operated by small crews but became a staple asset in riverine operations; they patrolled waterways, performed special operations, gunfire support and insertion of troops into enemy territory.
The brown-water Mobile Riverine Force was a joint venture between the Navy and the Army, modeled after the earlier French Riverine and coastal patrols in the First Indochina War (1946–1954). In the beginning this force consisted of mostly modified surplus U.S. World War II landing craft (boats), such as the LCMs, LCVPs, LCIs, etc. The only entirely new riverine boat from the French Indochina War had been the French designed STCN (an all-steel "V" hulled boat, approximately 40 feet in length, whose design had been influenced by the U.S. LCVP). This particular craft influenced the design of the U.S. Navy's only original riverine boat built for the Vietnam War—the 50-foot all-steel hull, aluminum superstructured Assault Support Patrol Boat (ASPB) or "Alpha Boat". The ASPB was built by the Gunderson Company, in Oregon, USA, and was of reinforced construction, in order to survive exploding mines. As a consequence, the ASPB earned a reputation as the "minesweeper" of the riverine forces.
Along with the aforementioned PBRs, other riverine craft included PCFs, ASPBs, and monitors (modified LCMs). Together these craft formed a Mobile Riverine Force, that utilized various supporting facilities, such as the Yard Repair Berthing and Messings, advance bases, LSTs, helicopter and seawolf units.
The brown-water navy (in conjunction with other efforts, such as Operation Market Time and Operation Game Warden) was largely successful in its efforts to stop North Vietnam using the South Vietnamese coast and rivers to resupply its military and the Viet Cong. The flow of weapons and ammunition came to a virtual standstill during Operation Market Time, from 1965 and 1970.
Brown-water river assault units were formalized in January 1967 with the 2nd Brigade, 9th Infantry Division arriving under the command of Major General William Fulton. Later that same year, in combination with U.S. Navy Task Force 116 & 117 they formed the Mobile Riverine Force. In 1970, for the last time since the Civil War, the Navy stood down the last of its brown-water navy units, as they were turned over to the South Vietnamese and Cambodian governments under the Vietnamization policy.
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