The definition of a Base Type S is a type of aircraft that is designed to operate in a wide variety of environments. This type of aircraft is capable of operating in a variety of weather conditions, from hot and humid to cold and dry. The Base Type S is also designed to be able to fly at high altitudes and speeds, allowing it to cover large distances quickly. Additionally, the Base Type S is equipped with a variety of sensors and avionics that allow it to navigate in a variety of conditions. This type of aircraft is also designed to be able to land on a variety of surfaces, from hard-packed dirt to snow and ice. The Base Type S is also designed to be able to carry a variety of payloads, from cargo to passengers. Finally, the Base Type S is designed to be able to operate in a variety of conditions, from day to night, and in a variety of climates. All of these features make the Base Type S a great choice for those looking for an aircraft that can handle a variety of conditions and still provide a reliable and safe flight.