ZCZC JA36 160909 UTC MAR 26 VARNA RADIO ON BEHALF OF ROMANIA NAVWARN 12/BLACK SEA.ROMANIA. BETWEEN 16.03.-30.06.2026 HYDROGRAPHIC MARINE ACTIVITIES ARE BEING CONDUCTED BY THE SHIP R/V KOBI RUEGG IN AREA: 43 54172N 029 42605E 43 53032N 029 42045E 43 53372N 029 40758E 43 54489N 029 41327E DANGEROUS FOR NAVIGATION. CANCEL THIS MSG ON 30.06./2200 UTC. NNNN