| Two or more aircraft in the same direction from the interrogator with a difference in slant range of less than 1.7NM |
| Two or more aircraft different directions from the interrogator at the same altitude with a difference in slant range of less than 1.7NM |
| Two or more aircraft different directions from the ground station at the same altitude with a difference in slant range of more than 1.7NM |
| Two modes, each 1024 codes |
EN 