| Serial number of recommendations | Authorized date | Corresponding Core content in recommendations |
| P.311-14 | 2013-09 | Acquisition, presentation and analysis of data in studies of tropospheric propagation |
| P.845-3 | 1997-08 | HF field-strength measurement |
| P.846-1 | 1995-10 | Measurements of ionospheric and related characteristics |
| P.1148-1 | 1997-05 | Standardized procedure for comparing predicted and observed HF sky-wave signal intensities and the presentation of such comparisons |