Humaitá-class gunboat
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The ''Humaitá''-class gunboat was a two-unit class of
riverine A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...
gunboats designed by Paraguayan naval engineer
José Bozzano José Alfredo Bozzano Baglietto (Asunción, Paraguay, December 7, 1895 – December 14, 1969) was a military engineer and senior officer of the Paraguayan Navy who designed the gunboats Humaitá-class gunboat, ''Paraguay'' and ''Humaitá'' that ...
and built in Genoa, Italy, for the
Paraguayan Navy The Paraguayan Navy ( es, Armada Paraguaya) is the maritime force of the Armed Forces of Paraguay, in charge of the defense of Paraguay's waters despite not having direct access to the sea. It has gone to war on two occasions: the War of th ...
from 1928 to 1931. The warships played a key role as fast armed transports during the Chaco War with
Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...
.


Design

The ''Humaitá'' class was designed to meet the Paraguayan goal of achieving naval supremacy in the Paraguay River, given the conflict with Bolivia over the Chaco region. The original plan had been part of Bozzano's thesis at the Massachusetts Institute of Technology. The gunboats had a larger freeboard than other fresh-water designs of the time. The forecastle was also longer than usual riverine units. The twin guns and the cannons made their gunnery heavier than some seagoing
destroyer In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against powerful short range attackers. They were originally developed in ...
classes, like the Italian and ,''Humaitá e Paraguay''
by Maurizio Brescia
or the British flotilla leaders. A British officer stated that the Paraguayan ships were the most powerful riverine vessels in the world.Farina, Bernardo Neri (2011). ''José Bozzano y la Guerra del Material''. Colección Protagonistas de la Historia, Editorial El Lector
Online edition
Chapter ''El Viaje Inolvidable''.
The range and the strength of the design foresaw the need of
troop transport A troopship (also troop ship or troop transport or trooper) is a ship used to carry soldiers, either in peacetime or wartime. Troopships were often drafted from commercial shipping fleets, and were unable land troops directly on shore, typicall ...
s in the incoming war. Bozzano was asked to build vessels capable of carrying a 1,400 men-strong regiment each.


Armament

The main battery consisted of two twin
Ansaldo Ansaldo Energia S.p.A. is an Italian power engineering company. It is based in Genoa, Italy. The absorbed parent company, Gio. Ansaldo & C., started in 1853. It was taken over by Leonardo S.p.A. In 2011, Leonardo S.p.A. sold 45% stake in An ...
4.7 in (120 mm) guns. The secondary armament was made of three Ansaldo anti-aircraft cannons, one for each band and a third on the foredeck. Originally the vessels mounted two Vickers 40 mm autocannons and cranes and racks for lying mines, of which each gunboat carried six.


Armour

The engines, main guns and bridge were protected by a light armour shield. The
armoured belt Belt armor is a layer of heavy metal armor plated onto or within the outer hulls of warships, typically on battleships, battlecruisers and cruisers, and aircraft carriers. The belt armor is designed to prevent projectiles from penetrating to t ...
was thick, the
turrets Turret may refer to: * Turret (architecture), a small tower that projects above the wall of a building * Gun turret, a mechanism of a projectile-firing weapon * Objective turret, an indexable holder of multiple lenses in an optical microscope * M ...
and deck armour had a thickness of and the bridge's armoured plate .


Propulsion

The propulsion system consisted of two boilers connected to two
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geared turbines. The turbines produced 3.800 hp for a speed of .


Ships in class


Operational history

The two ships of the class, ARP ''Humaitá'' (C2) and ARP ''Paraguay'' (C1), departed from Genoa on 19 April 1931, manned by Bozzano, a handful of Paraguayan officers and an Italian crew. They entered the Atlantic after paying an unintended official visit to
Gibraltar ) , anthem = " God Save the King" , song = " Gibraltar Anthem" , image_map = Gibraltar location in Europe.svg , map_alt = Location of Gibraltar in Europe , map_caption = United Kingdom shown in pale green , mapsize = , image_map2 = Gib ...
, where they were received by the battlecruiser , and sailed for Buenos Aires, Argentina, via Pernambuco in Brazil. In Buenos Aires the Italian personnel was replaced by a Paraguayan crew. The gunboats reached Asunción on 5 May 1931. The arrival of the vessels prompted yet another diplomatic protest from Bolivia, whose bilateral relations with Paraguay had been increasingly deteriorating due to the dispute over the Chaco region since 1928. The first operational mission of ''Humaitá'' was the deployment of a detachment of reservists to
Puerto Casado Puerto Casado (formerly known as La Victoria) is one of the 4 districts in Alto Paraguay Department, Paraguay. It includes the town of La Victoria, Paraguay, La Victoria or Puerto La Victoria, which has a population of around 7,800. History and ...
, some from the frontline, in July 1932, barely a month after the beginning of the Chaco War with Bolivia. Along with their role of fast transport of soldiers and resupplies, the gunboats provided air defense to the shipping on the Paraguay River. The first engagement against Bolivian aircraft took place near Puerto Leda on 22 December 1932, when two Vickers Vespas dropped a bomb and strafed ''Humaitá'', only to be driven off. Paraguayan sources claimed one aircraft damaged. The Vespas had attacked and damaged the Paraguayan gunboat at
Bahía Negra Bahía Negra is a district in the department of Alto Paraguay, Paraguay.. Located on the right bank of the Paraguay River The Paraguay River (Río Paraguay in Spanish, Rio Paraguai in Portuguese, Ysyry Paraguái in Guarani) is a major river in ...
just minutes before. ''Humaitá'' was hit by several machine-gun rounds from one of the planes, but her armour shield prevented any damage. According to the Paraguayan Navy files, ''Humaitá'' ferried 62,546 troops upriver for a total of 84 trips. ''Paraguay'' carried 51,867 soldiers to the frontlines in 81 trips. The Bolivian army gave up any hope of a naval presence in the Paraguay River when they learned of the firepower of the gunboats, although they deployed the 50-ton armed launch ''Tahuamanu'' on the river for a brief time. In the last months of the war, as the Paraguayan offensives around
Villa Montes Villamontes (or: ''Villa Montes'') is a town in the Tarija Department in south-eastern Bolivia. Also it is called the benemerita town (well-deserving of the mother country) due to its importance during the Chaco War in the 1930s. Location ''V ...
dragged on, the Paraguayan High Command consulted the navy about the feasibility of dismounting ''Humaitá''s main guns and moving them in an inland trip to the trenches. A special tracked vehicle was adapted from a tractor to tow the ship's turrets through the forest. The Commander-in-Chief of the army, General Estigarribia, hoped that the rate of fire and range of the 4.7 in twin guns would pound the defenses of Villa Montes to pieces from away, but the war was over before the plan could come together. During the 1947 Paraguayan civil war, the crews of ''Humaitá'' and ''Paraguay'', at the time undergoing a major overhaul in Buenos Aires, took control of the vessels and arrested the officers loyal to president Higinio Morínigo. They sailed up to Carmelo, in Uruguay. The vessels had to be armed with machine guns instead of antiaircraft cannons, because the older ones had been dismounted to be replaced in Argentina. The crew also picked up a cache of 250 rifles. The rebel ships then steamed up the
Paraná river The Paraná River ( es, Río Paraná, links=no , pt, Rio Paraná, gn, Ysyry Parana) is a river in south-central South America, running through Brazil, Paraguay, and Argentina for some ."Parana River". Encyclopædia Britannica. Encyclopædia Br ...
, and near Paso de la Patria, Argentina, the government T-6 Texans aircraft unleashed a series of airstrikes on the rebel flotilla, disabling ''Humaitá'', which was hit by a bomb that destroyed the central gunfire director and became stranded off Ituzaingó. Rebel personnel from ''Paraguay'' landed on the islands of Corateí and San Pablo, but they were eventually isolated and captured on 25 July by loyal troops carried by the transport ships ''Tirador'' and ''Capitán Cabral''. ''Humaitá'' was afloat again by 13 August, when she and her
sister ship A sister ship is a ship of the same class or of virtually identical design to another ship. Such vessels share a nearly identical hull and superstructure layout, similar size, and roughly comparable features and equipment. They often share a ...
tried to enter the Paraguay River. Both ships were shelled by a loyal coastal battery and had to withdraw to Itá Ibaté in Argentina. The gunboats were interned by Argentine authorities, and eventually handed over to the Paraguayan government in August, when the rebellion was finally crushed. In 1955, ''Paraguay'' became involved in the aftermath of Argentina's Revolucion Libertadora, when former president Juan Domingo Perón went into exile aboard the Paraguayan vessel. The last military mission of the gunboats took place on the first hours of 3 February 1989, during the fall of president Alfredo Stroessner, when ''Humaitá'' along with the patrol boats ''Capitán Cabral'' and ''Itaipú'', joined the rebel forces and shelled government and military facilities loyal to Stroessner. The shelling was decisive for the success of the coup against the Stroessner dictatorship. The gunboats were upgraded in 1975. ''Humaitá'' was made into a
museum ship A museum ship, also called a memorial ship, is a ship that has been preserved and converted into a museum open to the public for educational or memorial purposes. Some are also used for training and recruitment purposes, mostly for the small numb ...
in 1992, at anchor in Asunción's bayARP ''Humaitá''
while ''Paraguay'' was still used as storage ship, pending the replacement of her steam propulsion with diesel engines. On 24 December 2022, ''Humaitá'' began to take water at her moorings and listed port side. She was refloated by divers and technicians of the Paraguayan Navy by 28 December.


References


Further reading

Sapienza, Antonio Luis (Helion, 2018), ''Aerial Operations in the Revolutions of 1922 & 1947 in Paraguay''.


External links

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(accessed 2016-06-09) *

(accessed 2016-06-09) {{DEFAULTSORT:Humaita class gunboat Gunboats of the Paraguayan Navy Ships of the Paraguayan Navy Ships built in Italy Riverine warfare Chaco War Ships of the Chaco War