Após algumas pesquisas, encontrei um artigo do Wikileaks de 19 de novembro de 2009, que lê em parte:
- (SBU) SUMMARY: Miami and Havana air traffic controllers signed a letter of agreement (LOA) on November 12 updating procedures for the coordination of flights between Cuban and U.S. controlled airspace. Both sides stressed the excellent working relationship between the Miami Air Route Traffic Control Center (ARTCC) and the Havana Area Control Center (ACC). The U.S. delegation agreed to review information to be provided by the Cuban delegation regarding flights operating under the rules of "due regard" that could pose a safety risk. Both sides also agreed to discuss switching from verbal to electronic flight data sharing, on the margins of a regional aviation meeting in Miami in May 2010. END SUMMARY
Aparentemente, os procedimentos de handoff têm sido uma ocorrência regular há muito tempo e cooperam extensivamente.