"Chile has submitted abundant evidence to the court showing the use, and respect of the boundary parallel for numerous purposes ranging from the laying of submarine cables to fisheries enforcement to air space," he added. "Peru had ample opportunity to object to Chile's actions, yet it never did."
The Peruvian government's lawyer, Alain Pellet, told the court Monday there is "a flagrant lack of any maritime delimitation" between the two countries.
Pellet said Peru wants the 16-judge court to draw a line that will equally divide the sea off the two countries' coasts based on established international law. "Peru asks neither more nor less than the laws of the sea grant to all coastal states," he said.
Hearings are continuing. Judges will likely then take months to reach a decision on the boundaries.
Associated Press writer Luis Henao contributed to this report from Santiago, Chile.