I'm pretty sure that the dredger RECREIO DOS BANDEIRANTES is the former RIO DE JANEIRO (IMO 5295818), built by IHC/De Klop for the Brazilian Government in 1961 and deleted from IHS-Fairplay in 2010, probably because they had no recent information. There was a sister MINAS GERAIS (IMO 5235648) which was apparently broken up in 4/2004. Still trying to get confirmation and it would be premature to give this one an IMO number.
Incidentally, after being abandoned by her owner (Bandeirantes Dragagem e Constru