NEW DELHI — India has taken delivery of the fourth P-8I maritime patrol aircraft from Boeing, which has fulfilled the first half of a contract for eight of the type. The new aircraft has joined the other three P-8Is currently undergoing operational evaluation at the naval air station in Rajali, in southern India. Two more aircraft are expected to be delivered this year. “This marks an important milestone—the halfway point for P-8I deliveries to India,” says Dennis Swanson, Boeing Defense & Space vice president in India.