Gulfstream G600 Debuts At NBAA-BACE A fully outfitted Gulfstream G600 is making its debut at the 2017 edition of the NBAA-BACE. Gulfstream announced today that the aircraft will continue to be a testbed through until certification in 2018. The G600 features industry-leading cabin sound levels, the lowest cabin altitude and 100 percent fresh air, which reduce fatigue and increase mental awareness. The G600 has 14 panoramic windows that let in an abundance of natural light. The G600 is designed to seat up to 19 passengers. Once aboard, they can work, dine, relax and sleep.