(1) Radio navigational services are services  by which  it is possible to determine the position, speed, orientation, route  or other  characteristics  of an aircraft or vessel,  or obtain  information regarding  such parameters,  using  radio waves.

(2) Radio navigation services are of two categories-

(a) aeronautical  radio  navigation, being  navigational  services  provided to aircraft  for  satellite,  signal  collection  stations,  located  on  board the aircraft;  and

(b) maritime radio  navigation, being  radio navigation services provided to navigable vessels and for satellite, signal  collection stations  located  on board  the vessels.