The AvHoFlu Rio Negro, in the context of Operation CATRIMANI II, carried out an operational survey of the river that gives the operation its name, becoming the first MB ship to sail within the Yanomami Indigenous Land (TIY).

Narrow, shallow and with many rocks, the Catrimani River enters the TIY connecting the region to the Rio Branco, but poses a challenge to the navigation of larger vessels.

Having indigenous communities on the banks of the river, and giving access to the interior of the TIY, the Catrimani River is important for the actions that are being developed by the CATRIMANI II Joint Operational Command and by the State Agencies that, coordinated by the Government House of Roraima, are part of this great effort of the Federal Government.

The survey carried out by the ship brings important information about the operating conditions in the region and its passage through the indigenous communities allows the collection of important information for the planning of future Hospital Care Operations in that axis.
The AvHoFlu Rio Negro is one of the three ships subordinated to the Northwest Hydrography and Navigation Center (CHN-9), a Military Organization responsible for updating nautical cartography and maintaining navigation aids in the area of jurisdiction of the 9th Naval District Command (Com9ºDN), which covers the states of Acre, Amazonas, Rondônia, and Roraima.


Operation CATRIMANI II is a joint action between Public Security agencies, Agencies and the Armed Forces, in coordination with the Government House of Roraima, in the temporary and episodic use of means in the Yanomami Indigenous Land, in compliance with Ordinance GM-MD No. 1511, of March 26, 2024, which aims to act in a preventive and repressive manner against illegal mining, cross-border crimes and environmental crimes.