U.S.–Soviet Incidents at Sea agreement
The US-Soviet Incidents at Sea agreement is a 1972 bilateral agreement between the United States and the Soviet Union to reduce the chance of an incident at sea between the two countries and, in if one occurred, to prevent it from escalating. The United States proposed having talks on the agreement in 1968, and the Soviet Union accepted.
Source: Wikipedia — U.S.–Soviet Incidents at Sea agreement (CC BY-SA 4.0)