ZCZC HA28 251345 UTC SEP 26 IRAKLEIO RADIO NAVWARN 1215/26 AEGEAN SEA. ELEFSIS – POROS MEGARON GULF. CONDUCT OF SYSTEMS TRIALS ON 26 SEP 2026 FROM: 0700 UTC UNTIL 1700 UTC IN AREA BOUNDED BY: 37-49.54N – 023-13.51E 37-49.54N – 023-17.17E 37-52.36N – 023-17.17E 37-52.36N – 023-13.51E AVOID CROSSING ABOVE AREAS. CANCEL THIS MSG ON 261800 UTC SEP 26