The Brazilian Navy has three hospital ships, officially called Infirmary Assistance Ship (Navio de Assistência Hospitalar, in Portuguese), which are designed specifically to provide medical assistance on rivers having shallow waters. They have a helipad and carry two launches that can extend the vessels' reach into even shallower and narrower waters than the parent vessels can access. The vessels have two sickbays with a total of six berths, an operating theater, up to three dental offices, a laboratory, two clinics, and X-ray facilities. The vessels' main characteristics are: