The Gulf carriers, as relative newcomers to the industry, were also able to invest in modern fleets ideally suited to the kind of model they were building. Initially, the twin-engine Boeing 777 was favoured for its 300-seat capacity and range of more than 7,000 nautical miles, while later, the Airbus A380 superjumbo also became a useful tool for carrying more than 500 passengers to and from congested airports where take-off and landing slots were scarce.