Considering that the objectives of the agreement may be encouraged by complementary arrangements, including measures taken by naval vessels and military aircraft concerning the non-military vessels of each contracting party, the agreement also provides for: (1) generally, three to five days in advance, measures envisaged that “could pose a danger to navigation or aircraft in flight”; (2) information on incidents intended to be channelled through naval attachés belonging to each capital; and (3) annual meetings to review the implementation of the agreement. 5) “aircraft”: any military aircraft of the armed forces of the contracting parties, excluding spacecraft. The protocol to this agreement was born from the first meeting of the advisory committee established by the agreement. Each party recognized that additional arrangements for non-military vessels could improve their effectiveness. In the protocol signed on May 22, 1973 in Washington, D.C, each side pledged not to carry out simulated attacks on other people`s non-military ships. Convinced of the need to prevent dangerous military activities and thereby reduce the possibility of incidents between their armed forces, the agreement on maritime incidents, like other confidence-building measures, has no direct impact on the size, weapons or structure of the parties` troops. Rather, it aims to improve mutual knowledge and understanding of military activities; Reduce the possibility of conflict by accident, miscalculation or miscommunication; and increase stability in times of calm and crisis. In 1983, Secretary of the Navy John Lehman called the agreement “a good example of how the navy process works in the navy” and attributed soviet-American relations to the area that it would be “better than worse.” In 1985, he found that the frequency of incidents was “much lower than it was in the 1960s and early 1970s.” 1. In order to prevent dangerous military activities and to resolve incidents that may result from such activities quickly, the armed forces of the contracting parties establish and maintain communications in accordance with Schedule 1 of this agreement.