The Navy's Manned Spacecraft Recovery Force, maintains 24-hour surveillance of ships' positions and their readiness condition as well as weather conditions in the primary and contingency recovery areas. The Commander, Manned Spacecraft Recovery Force is responsible for the training of his force in addition to its control and coordination. Some 200 individual ships and large numbers of naval aircraft have participated in recovery operations since the Navy's first involvement in 1958. The recovery forces are divided into two task forces: TF 140, the Atlantic Recovery Force under control of the Atlantic Recovery Control Center (RCCA) at Norfolk, Va., and TF 130 under control of the Pacific Recovery Control Center (RCCP) at Kunai, Hawaii. Either can handle recovery during any phase of the mission, and each continually moves its forces to maintain the best recovery positions as the spacecraft's ground track shifts during earth orbit. The recovery ships receive up-to-date information from RCCA,RCCP and NASA's Mission Conrol Center.