The United Earth AeroNav Forces (or AeroNav) was an organization under the United Earth government during the mid-21st century, which combined the aeronautic and naval functions of the world's militaries, as well as a variety of scientific, diplomatic, and other functions. For this reason, it was also known as the Combined Services. Their controlling authority was AeroNav Command, which was located on Norfolk Island in the South Pacific Ocean. AreoNav was one of two branches operating under authority of the PentaKrem, the other being the United Earth Ground Forces. (TOS novel: Strangers from the Sky)