Brazilian coast in the Atlantic Ocean, in an area with an "approximate depth of 5,000 meters (16,000 feet)," the Navy said in a statement. environmentalists criticized the decision, saying the aircraft carrier contains tons of asbestos, heavy metals and other toxic materials that could leach into the water and pollute the marine food chain. Brazil then brought the aircraft carrier back but did not allow it into port, citing the "high risk" to the environment