 Tracking ships normally operated in the South Atlantic Ocean, and the port of Recife, Brazil, contained a small contingent of PAA GMRD and RCAS personnel to assist technical personnel when their vessel arrived in the port for fuel, U.S. mail, logistics, or a recreation period.Providing in-port periods of rest and relaxation for technical personnel and crew members was a priority requirement, since the tracking ships often remained at sea for a month or more.The Vandenberg and Arnold also operated in the Pacific Ocean (North and South).