Despite exhaustive searches, no information can be found in the concrete literature about the deepest point of the EEZ in Brazil. In searches undertaken between 2014 and 2022, nothing was found, which forces us to believe that this is unavailable information.
In an attempt to try to answer this question, assuming the role of first source to raise possibilities for an answer, Vox Hub undertook a careful analysis, based initially on the map on page 37 of the Geographical Atlas of Coastal and Oceanic Zones in Brazil (IBGE, 2011, SEE), which provides a bathymetry of the country's ZEE. In the figure below we reproduce the map of all of Brazil, and in the details the two regions of attention.
Blue tones refer to regions below 4,288m; the purple tones of regions below 5,000m, and only occur in the oceanic portion east of Martim Vaz Island.
Based on this, and in accordance with the Plano de Levantamento da Plataforma Continental Brasileira (SEE), a circle taken from Martim Vaz with a radius of 370km was traced, defining the Brazilian portion of the EEZ in the region, that confines the deepest region of the Brazilian EEZ.
A careful manual search was undertaken in the area of this arc, and a position was identified at 19°38'39.44"S and 26°03'33.86"W, which had a depth of -5,854m. Subsequent searches in the region, also manual, did not find a deeper point. This point, unnamed, is located 355,2 km from Martim Vaz, c. 1,398 km off Bahia coast, and just 14,8 km from the border of Brazilian EEZ.
Is this point the deepest of the Brazilian EEZ? Probably not! But it is a proposal whose refutation, motivated by official data, will be extremely well accepted. Vox Hub is not afraid of making mistakes; afraid that there is nothing about.
