The court sentenced the crew commander to 24 years in jail, and the other pilots to 14 years, Gamlet Gasparyan, press secretary of the Armenian foreign ministry, told RIA Novosti.
A South African citizen accused of organising the coup attempt was sentenced to 63 years while three other South Africans to 50-60 years.
Local residents facing the same charges have been sentenced to one year.
The court held to confiscate the fishing vessel owned by the Armenian Dvin concern.
Lawyers of the Armenian pilots intend to appeal the verdict in the Supreme Court of Equatorial Guinea, and international courts, if need be.
"We are convinced that the Armenian pilots have nothing to do with any actions aimed against Equatorial Guinea and its authorities, and the court failed to provide any substantial evidence to prove that they are guilty. The Armenian government will do its best to make sure that the competent Equatorial Guinean bodies make a fair decision to the point of releasing them," the Armenian Foreign Ministry reported.
The official Armenian delegation to Malabo that visited Equatorial Guinea more than once before and spared no effort will further stay in the country to discuss the release of the Armenian pilots to Armenia with the local authorities, the Foreign Ministry said.
Six Armenian pilots worked in Equatorial Guinea from January 2004 onboard the AN-12 aircraft registered in Armenia in accordance with an agreement between the German KAL company and the Armenian company, Dvin Concern. Late on March 7, the Armenian pilots and a representative of the German firm were arrested in Malabo.
The authorities of Equatorial Guinea are accusing them of involvement in the coup attempt as mercenaries. They are also accused of espionage - collecting information of political, economic and military interest.
The Armenian pilots strongly deny the charges.
