The BAe-146-301 is a 4-engined airliner capable of operating from 50ft above the surface to 35,000ft (10.7km, 0.38 kg/m3 nominal air density), for flights up to 5½hrs, whilst carrying research instrumentation fits up to 4,000kg and a crew up to 21. It carries a large existing instrumentation The BAe-146-301 is a 4-engined airliner capable of operating from 50ft above the surface to 35,000ft (10.7km, 0.38 kg/m3 nominal air density), for flights up to 5½hrs, whilst carrying research instrumentation fits up to 4,000kg and a crew up to 21. It carries a large existing instrumentation suite, optimized to atmospheric science. The aircraft is based at Cranfield in Bedfordshire, but can be deployed globally.