Propagation of radio waves in ionized and non-ionized media and the characteristics of radio noise, for the purpose of improving radiocommunication systems.
| Working Party 3J (WP 3J) | Propagation fundamentals |
| Working Party 3K (WP 3K) | Point-to-area propagation |
| Working Party 3L (WP 3L) | Ionospheric propagation |
| Working Party 3M (WP 3M) | Point-to-point and Earth-space propagation |
| Task Group 3/2 (TG 3/2) | Development for point-general point-to-area propagation prediction method |