| Subject | Spanish | English |
| radio, obs. | factor MAFT | distance factor |
| radio, obs. | factor MAFT | MUF factor |
| radio, obs. | factor MAFT | ionospheric transmission factor |
| radio | MAFT básica | standard MUF obsolete term |
| radio | MAFT básica | classical MUF obsolete term |
| radio | MAFT básica | basic MUF |
| radio | MAFT clásica término obsoleto | standard MUF obsolete term |
| radio | MAFT clásica término obsoleto | classical MUF obsolete term |
| radio | MAFT clásica término obsoleto | basic MUF |
| radio | MAFT normal término obsoleto | standard MUF obsolete term |
| radio | MAFT normal término obsoleto | classical MUF obsolete term |
| radio | MAFT normal término obsoleto | basic MUF |