Brothers Air Services
Brothers Air Services, internationally known as BASCO, was established in 1967 by Sayid Zein A. Baharoon following the end of British colonialism in Aden. It operated in the People's Democratic Republic of Yemen from 1967 to 1971 before its assets were nationalized and incorporated into the newly created Alyemda Airline.
According to Erich Wiedemann, BASCO flew to Addis Ababa and Assab in neighboring Ethiopia.
According to Olivier Roy, BASCO operated weekly flights between Aden and Brussels.