In 2005, Kenya Airways became the first airline in sub-Saharan Africa to achieve the IOSA certification (IATA Operational Safety Audit), a rigorous safety standard. In 2010, the airline was again the first in Africa to achieve the International Air Transport Association (IATA) Safety Audit for Ground Operations (ISAGO). The on-board service is renowned and the lie-flat business class seat – Premier World – on the wide-body aircraft is consistently voted among the world’s top 10. Kenya Airways has consistently been voted amongst the best Airlines in Africa.