Lavatory (enclosed / belted)
Business jet lavatories range from a curtained emergency seat with a toilet beneath the cushion in very light jets, through fully enclosed lavatories with solid doors and a sink in light and midsize aircraft, to large-cabin jets with two lavatories and, on ultra-long-range aircraft and bizliners, a shower. Many lavatory seats are certified as belted seats, which is how a six-seat jet can be marketed as seven seats; sitting on one for a flight is legal but not pleasant. For flights over 90 minutes, or with children, older passengers or anyone who values privacy, an enclosed lavatory is worth asking about specifically, and some very light jets have none at all.